Abstract

A SCADA web HMI system draws an HMI screen including a first material-to-be-rolled part arranged in a first zone and an extendable/contractible second material-to-be-rolled part arranged in a second zone. The first and second material-to-be-rolled parts are drawn at each drawing cycle shorter than a reception cycle of PLC signals. At each drawing cycle after a first PLC signal is received, a first material-to-be-rolled part head-end position is calculated based on a conveyance speed included in the first PLC signal and an elapsed time. A drawing size of the first material-to-be-rolled part is set to a length from an entry side of the first zone to the first material-to-be-rolled part head-end position. When a second PLC signal is received, the first material-to-be-rolled part head-end position has not reached the second zone, the drawing size of the first material-to-be-rolled part is set to a zone length of the first zone.

IPC Classes  ?

• G05B 19/042 - Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors

Abstract

An ultrasonic atomization apparatus according to the present disclosure includes a non-contact mist supply pipe that is provided above an atomization container without being in contact with the atomization container including a mist output pipe and a leakproof tank that is connected to the mist output pipe without being in contact with the non-contact mist supply pipe. The leakproof tank contains a sealing proper liquid. In this case, the sealing proper liquid is contained in a liquid containing space formed between the leakproof tank and the mist output pipe.

IPC Classes  ?

• B05B 17/06 - Apparatus for spraying or atomising liquids or other fluent materials, not covered by any other group of this subclass operating with special methods using ultrasonic vibrations
• B05B 12/08 - Arrangements for controlling deliveryArrangements for controlling the spray area responsive to condition of liquid or other fluent material discharged, of ambient medium or of target

Abstract

A target value and a detailed prediction value of the first control index (T1CTref, T1CTprd) are used to calculate an FF water injection amount. Target values of first and second control indexes (T1CTref, T2CTref) and measured values of first and second control indexes (T1CTact, T2CTact) are used to calculate an FB water injection amount. Coolant injection amounts in an FF bank group (B1 to Bj) is controlled based on respective positions of segments constituting the steel plate, an initial water injection amount, and the FF water injection amount. Coolant injection amounts in an FB bank group (Bj+1 to BN) is controlled based on the respective positions of the segments, the initial water injection amount, and the FB water injection amount.

IPC Classes  ?

• B21B 37/74 - Temperature control, e.g. by cooling or heating the rolls or the product

Abstract

This rolling emulation device executes: processing for acquiring a control signal used for control of a plurality of rolling machines from a controller for controlling the plurality of rolling machines via a communication interface; processing for emulating conveyance of a material subject to rolling by inputting the control signal to a rolling conveyance model simulating conveyance of a material subject to rolling in a rolling line; processing for generating simulation sensor signals simulating sensor signals output from a plurality of sensors provided on the rolling line on the basis of the result of the emulation by the rolling conveyance model; processing for acquiring actual sensor signals output from the plurality of sensors; learning processing for causing the rolling conveyance model to reflect a model correction value for reducing the difference between a simulation sensor signal and an actual sensor signal; and abnormality determination processing for determining, if the difference is equal to or greater than a first threshold value, that an abnormality has occurred in one of the plurality of rolling machines.

IPC Classes  ?

• B21C 51/00 - Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses
• B21B 37/00 - Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
• B21B 38/00 - Methods or devices for measuring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product

Abstract

This rolling recording device stores: a plurality of camera images acquired by a plurality of cameras for imaging a plurality of rolling mills; control signals to be inputted to the respective rolling mills; actual measurement values of rolling states acquired by a plurality of sensors provided on a rolling line; HMI screen information for creating an HMI screen in which the rolling line is exemplified; and time point information including an acquisition time point for each of the plurality of camera images, an input time point for each of the control signals, and an update time point for the HMI screen information. In addition, the rolling recording device executes: update processing for updating the HMI screen information on the basis of at least the actual measurement values regarding the rolling states; generation processing for generating an output display screen including a display screen for a target camera image, a display screen for a control signal, and the HMI screen which are synchronized on the basis of the time point information; display processing for displaying the output display screen on a monitor; saving processing for saving the output display screen; and reproduction processing for reproducing the history of the output display screens in response to a request.

IPC Classes  ?

• B21C 51/00 - Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses
• B21B 37/00 - Control devices or methods specially adapted for metal-rolling mills or the work produced thereby

Abstract

This rotating electric machine includes a stator, a rotor, a shaft, and a housing. The housing has a frame, a bracket, and a terminal member. The frame has a first inner peripheral surface, a second inner peripheral surface, a first joint surface, and a support part. The first inner peripheral surface forms a first through-hole in which the stator and the rotor are accommodated. The second inner peripheral surface forms a second through-hole in which the terminal member is accommodated. The first joint surface is connected to an end of the first inner peripheral surface in a first direction and is oriented in the first direction. The support part protrudes from the second inner peripheral surface and supports the terminal member. The bracket has a second joint surface facing the first joint surface and a protrusion, and closes an end of the frame in the first direction. The protrusion protrudes from the second joint surface in a second direction opposite to the first direction, and is fitted into the first through-hole. Further, the protrusion has an outer peripheral surface facing the first inner peripheral surface, and overlaps the support part in a direction intersecting with the first direction.

IPC Classes  ?

• H02K 5/00 - CasingsEnclosuresSupports

Abstract

A power conversion device includes: a first alternating current terminal, a second alternating current terminal, and a third alternating current terminal are arranged facing each other inside the housing, the first three-phase in one enclosure semiconductor unit is configured so that a signal distribution board of the power conversion device transmits a U-phase signal to the first alternating current terminal, a V-phase signal to the second alternating current terminal, and a W-phase signal to the third alternating current terminal, and the second three-phase in one enclosure semiconductor unit is configured so that the signal distribution board of the power conversion device replaces wiring so that the U-phase and W-phase are reversed, and transmits a W-phase signal to the first alternating current terminal, a V-phase signal to the second alternating current terminal, and a U-phase signal to the third alternating current terminal.

IPC Classes  ?

• H02M 7/00 - Conversion of AC power input into DC power outputConversion of DC power input into AC power output
• H05K 7/14 - Mounting supporting structure in casing or on frame or rack
• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating

Abstract

A first communication line transmits a control signal from an I/F circuit to an n-th drive circuit. A second communication line transmits a state detection signal of semiconductor switches from the n-th drive circuit to the I/F circuit. An i-th drive circuit includes a driver for an i-th semiconductor switch, an abnormality detection circuit for detecting an abnormality of the i-th semiconductor switch, and first and second notification members. The abnormality detection circuit detects the abnormality of the i-th semiconductor switch and an operation state of the i-th semiconductor switch, and notifies a detection result using the first notification member. The abnormality detection circuit generates the state detection signal indicating an operation state of the i-th to n-th semiconductor switches, detects a mismatch between the control signal and the operation state of the i-th to n-th semiconductor switches, and notifies a detection result using the second notification member.

IPC Classes  ?

• H02M 1/32 - Means for protecting converters other than by automatic disconnection
• H02H 3/05 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection Details with means for increasing reliability, e.g. redundancy arrangements
• H02H 7/12 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for convertersEmergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for rectifiers for static converters or rectifiers
• H02M 1/092 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices the control signals being transmitted optically
• H02M 7/797 - Conversion of AC power input into DC power outputConversion of DC power input into AC power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

In an electrode unit of an active gas generation apparatus according to the present disclosure, a dielectric film support member includes a support surface supporting a high voltage side dielectric film from a lower side. A lower surface of the dielectric film suppression member provided on an upper side of a ground side dielectric film includes a dielectric contact region overlapped with a peripheral region of the high voltage side dielectric film and the support surface of the dielectric film support member in a plan view and a dielectric non-contact region overlapped with an intermediate region of the high voltage side dielectric film in a plan view. The high voltage side dielectric film is suppressed from the dielectric contact region on an upper side by the dielectric film suppression member receiving suppress strength of a plurality of suppression auxiliary members.

IPC Classes  ?

• H05H 1/24 - Generating plasma

Abstract

According to the present disclosure, there is provided an inexpensive power conversion system that can achieve loss reduction and space saving. The power conversion system includes: a power converter configured to convert direct-current power input from a direct-current power supply, into alternating-current power or direct-current power; a capacitor provided between a positive electrode direct-current line and a negative electrode direct-current line connected to input terminals of the power converter; a ground line provided with a first ground resistor and configured to connect the negative electrode direct-current line and a ground potential; a discharge line configured to connect the positive electrode direct-current line and the ground line on the ground potential side of the first ground resistor; and a discharge switch provided in the discharge line and configured to be turned on to discharge residual charges of the capacitor.

IPC Classes  ?

• H02M 7/537 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
• H02M 1/00 - Details of apparatus for conversion

Abstract

In an active gas generation apparatus according to the present disclosure, a first number of high voltage electrode structures are held in a holding space in corresponding grooves in the first number of grooves, respectively, and the second number of ground electrode structures are held in the holding space in corresponding grooves in the second number of grooves, respectively. The first number of high voltage electrode structures and the second number of ground electrode structures are alternately disposed along a Y direction, and a first planar region of each of the first number of high voltage electrode structures and a second planar region of each of the second number of ground electrode structures face each other with a separation space therebetween.

IPC Classes  ?

• H01J 37/32 - Gas-filled discharge tubes

Abstract

This DC power conversion device of one embodiment is configured so that a first bridge circuit is driven by a first drive signal and converts first DC power to first AC power. A second bridge circuit is driven using a second drive signal and converts second DC power of second DC voltage to second AC power. An inductance element is provided between the first bridge circuit and the second bridge circuit. A control device determines a phase difference between the first drive signal and the second drive signal that are used for dual active bridge (DAB) phase-shift control, respectively generates the first drive signal and the second drive signal in accordance with the phase difference, and drives the first bridge circuit and the second bridge circuit. In the case where an allowable range for the phase difference is determined using the first DC voltage and the second DC voltage and the magnitude of a current flowing in the inductance element is limited, the control device generates the first drive signal and the second drive signal such that the phase difference is limited within the allowable range.

IPC Classes  ?

• H02M 3/28 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC

Abstract

The present disclosure provides a strip thickness control device for a hot rolling mill that can reliably pass a leading end of a material-to-be-rolled without raising equipment cost even in a case of rolling the material-to-be-rolled extremely thinly. The strip thickness control device for a hot rolling mill includes a strip thickness meter installed at a delivery side of a last one of rolling stands in a series direction, a gap calculating unit that calculates a gap between rolls in each of the rolling stands, the gap being larger than a product target strip thickness of the material-to-be-rolled and corresponding to a passable strip thickness that enables a leading end of the material-to-be-rolled to be passed stably, a gap setting unit that sets the gap calculated by the gap calculating unit for each of the rolling stands, an automatic strip thickness control unit that executes automatic strip thickness control of minimizing a strip thickness deviation between a strip thickness measured value of the strip thickness meter and the passable strip thickness, and a target strip thickness changing unit that changes the passable strip thickness to the product target strip thickness by adding a strip thickness bias to the strip thickness deviation at a predetermined ramp rate after the leading end of the material-to-be-rolled is passed through the last one of the rolling stands.

IPC Classes  ?

• B21B 37/20 - Automatic gauge control in tandem mills
• B21B 38/04 - Methods or devices for measuring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring thickness, width, diameter or other transverse dimensions of the product

Abstract

A control apparatus including a first operation control circuit configured to open a direct-current switch when a power conversion apparatus is in a waiting state and a first direct-current voltage value is greater than a predetermined first threshold, a clocking circuit configured to, when the direct-current switch is opened, clock an elapsed time after the direct-current switch is opened, and a soundness determination circuit configured to calculate a first difference voltage value that is a difference between the first direct-current voltage value and a second direct-current voltage value when the power conversion apparatus is in the waiting state and the direct-current switch is opened, and the elapsed time is greater than or equal to a predetermined first time, to determine that the direct-current switch is abnormal when the first difference voltage value is less than or equal to the predetermined second threshold.

IPC Classes  ?

• H02H 3/26 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to difference between voltages or between currentsEmergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to phase angle between voltages or between currents
• H02H 7/122 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for convertersEmergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for rectifiers for static converters or rectifiers for inverters, i.e. DC/AC converters
• H02H 7/20 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for electronic equipment

Abstract

A cooler of an embodiment includes a contact surface, a flow path formation portion, a supply portion, a discharge portion, and at least one retention portion. The contact surface is in contact with a cooling target object. A flow path through which a refrigerant flows is formed in the flow path formation portion. The supply portion supplies the refrigerant to the flow path. The discharge portion discharges the refrigerant from the flow path. The retention portion changes a flow path cross-sectional area so as to promote retention of the refrigerant locally in the flow path.

IPC Classes  ?

• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating

Abstract

The purpose of the present disclosure is to provide a structure for an active gas generation device capable of supplying a uniform active gas to a treatment space. An electrode unit (55) in an active gas generation device (75) according to the present disclosure comprises a ground conductor (60) provided below a ground-side electrode constituting unit (E2). A housing bottom (1a) of a housing (1) has a housing opening (41), where the housing opening (41) includes an upper region (41a) and a lower tapered region (41t) of which the opening area increases the further downward. A plurality of gas ejection ports (70) provided to the ground conductor (60) are provided so as to approach each other the further downward such that a plurality of partial active gases collide in a collision region (80), where the collision region (80) is present within the lower tapered region (41t) or within the upper region (41a) which is above the lower tapered region (41t).

IPC Classes  ?

• H05H 1/24 - Generating plasma

Abstract

An insulating tape includes a base layer, two adhesive layers, and two reinforcing layers. The base layer has a first surface and a second surface opposite to the first surface. The two adhesive layers contain nano-sized silica particles, and each overlap a corresponding one of the first surface and the second surface. The two reinforcing layers are each provided for a corresponding one of the first surface and the second surface, and are bonded to the base layer by the adhesive layers.

IPC Classes  ?

• H02K 3/04 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
• H02K 3/32 - Windings characterised by the shape, form or construction of the insulation

Abstract

A controller according to one embodiment of the present invention is for a power conversion device comprising: a semiconductor switching element that generates heat by power conversion; a heat sink of the semiconductor switching element; and a cooling mechanism that cools the heat sink. The controller includes an element temperature estimation unit and a control unit. The element temperature estimation unit derives an estimated value of the temperature of the semiconductor switching element by using either the drive amount of the semiconductor switching element or the temperature at a predetermined position within a prescribed range from the position of the semiconductor switching element. The control unit identifies an abnormal state of the cooling mechanism when the temperature difference between the estimated value of the temperature of the semiconductor switching element and the temperature at the prescribed position in the power conversion device has exceeded a predetermined threshold temperature. The threshold temperature is set to be lower than the upper limit temperature of an allowable range for the temperature difference and higher than a reference temperature predetermined in association with the calorific value of the semiconductor switching element.

IPC Classes  ?

• H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
• H02M 1/00 - Details of apparatus for conversion

Abstract

This quality defect analysis assistance system for a rolled product is provided with a plurality of recording devices, a conversion device, and a search device. A first recording device records steel sheet time-unit information, rolling facility time-unit information, and manual operation time-unit information in a time-axis performance database in association with a product ID of the steel sheet. The conversion device converts each of the steel sheet time-unit information, the rolling facility time-unit information, and the manual operation time-unit information into length-unit information. A second recording device records each information converted by the conversion device in a product-unit database in association with the product ID. A third recording device records a rolling plan of the rolling plant and an error occurrence record of the rolling facility in the product-unit database. The search device uses the product ID of the steel sheet determined to be a defective product as a search key to extract information on the defective product from the time-axis performance database, the product-unit database, a machine-unit database, and an electricity-unit database.

IPC Classes  ?

• B21B 38/00 - Methods or devices for measuring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product

Abstract

This SCADA web HMI system comprises a PLC, an HMI client machine, and a SCADA server machine connected via a computer network. The PLC transmits block data relating to a field apparatus group that constitutes an industrial plant to the SCADA server machine at prescribed periods. The SCADA server machine comprises a communication driver that receives the block data, and a client management unit that is connected one-to-one with a plurality of HMI client machines, and performs WebSocket communication with each HMI client machine. The HMI client machines each execute a web browser that displays an HMI screen on which parts showing the status of the industrial plant are disposed, and update the status of the parts according to the signal data received from the client management unit. The HMI client machine comprises a client installer for installing SCADA web programs loaded during startup of the web browser.

IPC Classes  ?

• G05B 19/05 - Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts

Abstract

This paper wind-up device comprises: a first wind core which is provided on a first arm and on which paper is to be wound up, the first arm turning around a rotation axis; a first motor that drives the first wind core; a second wind core which is provided on a second arm and on which the paper is to be wound up after the first wind core, the second arm turning around the rotation axis; and a control device that performs rotation control of the first motor and the second motor. In the rotation control, after the wind-up of the paper by the first wind core is completed, and during operation of a traverse cutter that cuts the paper near the second wind core after the second wind core, due to the turning of the second arm, came to a position at which to wind up the paper, if the torque value of the second motor is equal to or greater than a torque reference value, the control device switches the control mode of the second motor from speed control to torque control, and performs tension correction control for adjusting the torque value of the second motor such that the tension of the paper falls within a target range.

IPC Classes  ?

• B65H 19/22 - Changing the web roll in winding mechanisms or in connection with winding operations
• B65H 18/10 - Mechanisms in which power is applied to web-roll spindle
• B65H 19/26 - Cutting-off the web running to the wound web roll
• B65H 23/198 - Registering, tensioning, smoothing, or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in winding mechanisms or in connection with winding operations motor-controlled

Abstract

Provided is a DC power supply device that is connected to a load that can become a DC power supply, the DC power supply device comprising: a main circuit unit that has a high potential output terminal connected to a high potential input terminal of the load, and a low potential output terminal connected to a low potential input terminal of the load, and that is connected to a power supply, converts the power supplied from the power supply to DC power according to the load, and that supplies the converted DC power to the load; and a first rectifying element that is provided at one of between the high potential input terminal and the high potential output terminal, and between the low potential input terminal and the low potential output terminal, and suppresses the inflow of energy from the load to the main circuit unit. As a result, provided is a DC power supply device that can suppress the inflow of energy from the load.

IPC Classes  ?

• H02M 7/12 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02M 3/155 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

An electric power conversion unit comprising a casing, a first element, a second element, and an anti-explosion plate. The first element is disposed inside the casing. The second element is disposed adjacent to the first element in a horizontal direction inside the casing. The anti-explosion plate covers the first element and the second element in a top view of the casing. The anti-explosion plate is a laminate conductor connected to the first element and the second element.

IPC Classes  ?

• H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode

Abstract

Provided is an HMI screen creation device capable of creating an HMI screen in which a plurality of operation elements can be exclusively placed with a high degree of freedom without degrading the quality of the HMI screen. An HMI screen design device according to the present disclosure comprises a drawing unit having a stencil area in which the plurality of operation elements to be placed on the HMI screen are arranged so as to be selectable and a drawing area in which a drawing is prepared by placing the operation elements selected on the stencil area, and a drawing data generating unit that generates drawing data, which is data about the drawing, in which the plurality of operation elements are placed. The drawing unit includes an exclusive grouping means that mutually exclusively groups the plurality of operation elements placed on the drawing.

IPC Classes  ?

• G06F 3/04817 - Interaction techniques based on graphical user interfaces [GUI] based on specific properties of the displayed interaction object or a metaphor-based environment, e.g. interaction with desktop elements like windows or icons, or assisted by a cursor's changing behaviour or appearance using icons
• G05B 23/02 - Electric testing or monitoring
• G06F 3/14 - Digital output to display device
• G06F 8/34 - Graphical or visual programming

Abstract

This hot rolling line comprises: a rough rolling mill; a finishing rolling mill; an intermediate device group provided between the rough rolling mill and the finishing rolling mill; a rough outlet side thermometer provided between the rough rolling mill and the intermediate device group; a finishing inlet-side thermometer provided between the finishing rolling mill and the intermediate device group; and a control device. The intermediate device group includes a cooling device which uses cooling water to cool a material-to-be-rolled. The control device includes: a setting calculation device which determines a flow rate setting value of the cooling water in the cooling device; a feed forward control device which executes, on the basis of the flow rate setting value, a feed forward control of the flow rate of the cooling water in the cooling device; and a learning device which calculates learning values on the basis of actual flow rate values of the cooling water in the cooling device and finishing inlet-side temperature values indicating actual temperature values of the material-to-be-rolled measured by the finishing inlet-side thermometer.

IPC Classes  ?

• B21B 45/02 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning

Abstract

An electric power conversion unit includes a housing, a plurality of fans, a heat sink, and a plurality of semiconductor elements. The fan generates a flow of air at an inside of the housing. The heat sink forms a flow path of the air on an upstream side of a flow route of the air at the inside of the housing. The plurality of semiconductor elements is arranged and aligned along a direction which intersects a flow direction of the air in the heat sink on an element arrangement plane of the heat sink.

IPC Classes  ?

• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating

Abstract

In the present invention, regarding first control indexes for steel-sheet winding temperature, four values, i.e., target, simple prediction, detailed prediction, and measured values, are calculated. Additionally, regarding second control indexes for steel-sheet winding temperature, three values, i.e., target, simple prediction, and measured values, are calculated. The target value and the detailed prediction value corresponding to the first control indexes are used for calculating a water spray amount (FF water spray amount) in FF banks. The target values corresponding to the first and second control indexes and the measured values corresponding to the first and second control indexes are used for calculating a water spray amount (FB water spray amount) in FB banks. The water spray amount in the FF banks is controlled on the basis of the positions of segments constituting the steel sheet, an initial water spray amount, and the FF water spray amount. The water spray amount in the FB banks is controlled on the basis of the positions of the segments constituting the steel sheet, an initial water spray amount, and the FB water spray amount.

IPC Classes  ?

• B21B 45/02 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
• B21B 37/76 - Cooling control on the run-out table

Abstract

This plate thickness control device of a rolling mill, which rolls a material-to-be-rolled to obtain a target plate thickness of a product, comprises a thickness deviation learning unit and a gap correction amount calculation unit. The plate thickness deviation learning unit learns a tendency of a plate thickness deviation that is the difference between the plate thickness of a product and the actual plate thickness of a material-to-be-rolled, which is measured in the outlet side of the rolling mill. In addition, the plate thickness deviation learning unit adopts, as the material-to-be-rolled, a material-to-be-rolled intended to be rolled by means of the rolling mill, and predicts, before rolling the material-to-be-rolled, the plate thickness deviation of the material-to-be-rolled on the basis of product information including the kind of steel and the plate thickness of a product of the material-to-be-rolled, and a value of the material-to-be-rolled measured at the upstream side of the rolling mill. The gap correction amount calculation unit calculates a gap correction amount for correcting a roll gap of the rolling mill so as to negate the plate thickness deviation predicted by the plate thickness deviation learning unit. The plate thickness control device of the rolling mill adjusts the roll gap of the rolling mill on the basis of the gap correction amount calculated by the gap correction amount calculation unit before rolling the material-to-be-rolled.

IPC Classes  ?

• B21B 37/20 - Automatic gauge control in tandem mills

Abstract

The purpose of the present disclosure is to provide an ultrasonic atomization device capable of obtaining a mist supply amount of raw material solution mist with good responsiveness and accuracy. The ultrasonic atomization device (201) according to the present disclosure comprises: a non-contact type mist supply pipe (40) which is disposed above an atomization vessel (1), including a mist output pipe (1t), without contact with the atomization vessel (1); and a leakage prevention tank (45) which is connected to the mist output pipe (1t) without contact with the non-contact type mist supply pipe (40). The leakage prevention tank (45) accommodates an appropriate sealing liquid (16). At this time, the appropriate sealing liquid (16) is also accommodated inside a liquid accommodation space (SP14) disposed between the leakage prevention tank (45) and the mist output pipe (1t).

IPC Classes  ?

• B05B 17/06 - Apparatus for spraying or atomising liquids or other fluent materials, not covered by any other group of this subclass operating with special methods using ultrasonic vibrations

Abstract

The purpose of the present disclosure is to provide an ultrasonic atomization device that can precisely obtain the mist supply amount of raw material solution mist with good responsivity. An ultrasonic atomization device (101) according to the present disclosure has a non-contact type mist supply pipe (20) above an atomization vessel (1) such that the non-contact type mist supply pipe (20) is not in contact with the atomization vessel (1) including a mist output pipe (1t). A pipe overlapping space (SP12) is provided between a coupling pipe part (23) of the non-contact type mist supply pipe (20) and an upper region (A1t) of the mist output pipe (1t). A leakage prevention gas supply pipe (25) is provided inside the pipe overlapping space (SP12) such that the leakage prevention gas supply pipe (25) is in contact with neither the mist output pipe (1t) nor the non-contact type mist supply pipe (20). The leakage prevention gas supply pipe (25) outputs mist leakage prevention gas (G2) from a gas output port (28) provided in an upper part of the leakage prevention gas supply pipe (25).

IPC Classes  ?

• B05B 17/06 - Apparatus for spraying or atomising liquids or other fluent materials, not covered by any other group of this subclass operating with special methods using ultrasonic vibrations

Abstract

In this uninterruptible power supply system (1), each uninterruptible power supply device (U) includes a reactor (21) and a semiconductor switch (23) which are connected in series between a bypass AC power supply (6) and a load (8). When turning on each semiconductor switch, load current (IL) is shunted to the series connection bodies of the N reactors and semiconductor switches. Accordingly, in comparison with a case without the reactors, it is possible to suppress and reduce variation in the magnitudes of currents (I1 to IN) flowing through the N semiconductor switches, thereby enabling reduction in the size of the semiconductor switch and reduction in cost.

IPC Classes  ?

• H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over

Abstract

Provided is a tension control device capable of suppressing a speed overshoot of rolling stock after exiting a final rolling stand of a finishing mill, to improve the accuracy of a stopping position of a tail end of the rewound rolling stock. The tension control device controls the tension of the rolling stock when the rolling stock that has exited the final rolling stand of the finishing mill is being wound onto a mandrel via a pinch roll. The tension control device is configured to be capable of switching a rotational drive of the mandrel between speed control and current control. The tension control device comprises a selecting means for comparing a torque required for speed control and a torque required for current control and selecting the smaller torque as a final torque, and an integrator for integrating an output of the speed control, and is additionally provided with a limit setting unit for setting a limit corresponding to a tension reference for the integrator, the configuration being such that the output of the integrator does not become saturated.

IPC Classes  ?

• B21C 47/02 - Winding-up or coiling

Abstract

A bidirectional chopper (2) selectively performs a charging operation for storing DC power received from DC bus lines (L1, L2) into an electricity storage device (7) and a discharging operation for outputting the DC power of the electricity storage device (7) to the DC bus lines (L1, L2). An inverter (3) converts the DC power received from the DC bus lines (L1, L2) into AC power to supply the AC power to a load (8) and converts a regenerative power generated by the load (8) into DC power to output the DC power to the DC bus lines (L1, L2). In the electricity storage device (7), a SOC reference value is set that is smaller than the upper limit value of an SOC usable range and larger than the lower limit value of the usable range. When an AC power supply (6) is healthy, a control device (5) controls the bidirectional chopper (2) so that the SOC of the electricity storage device (7) becomes the SOC reference value. When the AC power supply (6) is failed, the control device (5) controls, on the basis of the usable range, the discharging operation corresponding to the powering operation of the load (8) and the charging operation corresponding to the regenerative operation of the load (8).

IPC Classes  ?

• H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over
• B66B 1/34 - Control systems of elevators in general Details
• B66B 5/02 - Applications of checking, fault-correcting or safety devices in elevators responsive to abnormal operating conditions

Abstract

A drive device according to a first aspect of an embodiment comprises an impedance adjusting unit. The impedance adjusting unit uses a current value flowing through elements of a power converter and adjusts the impedance of a path for sending a control signal from a drive unit of the elements to a semiconductor switching element among the elements.

IPC Classes  ?

• H02M 1/08 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters

Abstract

In the present invention, an electric power converter comprises a housing, and first and second three-phase block semiconductor units of identical structure within the housing, wherein: each of the first and second three-phase block semiconductor units has a cooler, a semiconductor, a gate driver substrate, a first AC terminal, a second AC terminal, and a third AC terminal; the first AC terminals, the second AC terminals, and the third AC terminals are positioned facing each other within the housing so that the coolers are arranged on the outer side within the housing and so that the semiconductors, the gate driver substrates, the first AC terminals, the second AC terminals, and the third AC terminals are arranged on the inner side within the housing; the first three-phase block semiconductor unit is configured so that, due to a signal distribution substrate provided to the electric power converter, a U-phase signal is transmitted to the first AC terminal, a V-phase signal is transmitted to the second AC terminal, and a W-phase signal is transmitted to the third AC terminal; and the second three-phase block semiconductor unit is configured so that, due to the signal distribution substrate provided to the electric power converter, wiring is switched so that a U phase and a W phase are reversed, a W-phase signal being transmitted to the first AC terminal, a V-phase signal being transmitted to the second AC terminal, and a U-phase signal being transmitted to the third AC terminal.

IPC Classes  ?

• H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
• H02M 7/493 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode the static converters being arranged for operation in parallel

Abstract

The purpose of the present disclosure is to provide an ultrasonic atomization device that can precisely detect the liquid surface level of a raw material solution. In an ultrasonic atomization device (100) of the present disclosure, a raw material solution separation pipe (20) is provided to a side surface of an atomization container (1). The raw material solution separation pipe (20) has a raw material solution accommodation space (22) that is for accommodating a raw material solution (15) and a raw material solution passage port (20B) that is for performing supply and discharge of the raw material solution (15) between a raw material solution container and the raw material solution separation pipe (20). A liquid surface detector (40) is provided in proximity to the raw material solution separation pipe (20). The liquid surface detector (40) detects the level of the liquid surface (15A) of the raw material solution (15) in the raw material solution accommodation space (22) and outputs a liquid surface detection signal (S40) indicating the detected level of the liquid surface (15A).

IPC Classes  ?

• B05B 17/06 - Apparatus for spraying or atomising liquids or other fluent materials, not covered by any other group of this subclass operating with special methods using ultrasonic vibrations

Abstract

The purpose of the present disclosure is to provide an active gas generation device having a structure for preventing dielectric breakdown of a dielectric film. In an electrode unit (51) of an active gas generation device (71) according to the present disclosure, a dielectric film support member (10) has a support surface (10F) that supports a high voltage–side dielectric film (2) from below. The lower surface of a dielectric film suppression member (11) provided above a ground-side dielectric film (3) has: a dielectric substance contact area (112) that overlaps a peripheral area of the high voltage–side dielectric film (2) and the support surface (10F) of the dielectric film support member (10) in a plan view; and a dielectric substance non-contact area (111) that overlaps an intermediate area of the high voltage–side dielectric film (2) in a plan view. The high voltage–side dielectric film (2) is suppressed from the dielectric substance contact area (112) thereabove by the dielectric film suppression member (11) that receives the pressing force of a plurality of suppression assist members (32).

IPC Classes  ?

• H05H 1/24 - Generating plasma

Abstract

A phase angle detection system according to one aspect of an embodiment of the present invention detects the phase angle of an electric motor in a drive system equipped with a transmission unit that changes the rotation speed of the electric motor. This phase angle detection system comprises: a first sensor; a second sensor; and an arithmetic processing unit. The first sensor outputs a first signal for detecting at least a specific phase angle of a rotor of the electric motor. The second sensor outputs a second signal that enables the detection of the amount of rotation of an output shaft of the transmission unit. In the arithmetic processing unit, the amount of deviation included in a detection result of the specific phase angle from the first signal is predefined for each rotational direction of the electric motor, and the deviation amount of the first signal determined by the rotational direction of the electric motor, the detection result of the first signal, and the second signal are used to calculate an estimated value of the absolute angle of the rotor of the electric motor.

IPC Classes  ?

• H02P 6/16 - Circuit arrangements for detecting position

Abstract

Provided is a control device in a power conversion device for photovoltaic power generation connected with solar panels at a DC side, wherein the control device comprises: a modulation rate calculation unit which calculates a modulation rate on the basis of a DC voltage of the DC side of the power conversion device and a system voltage RMS value of an AC side of the power conversion device; a limiter adjustment unit which calculates a lower limit limiter operation value on the basis of a prescribed lower limiter setting value, the system voltage RMS value, and a prescribed rated value in response to the modulation rate calculated by the modulation rate calculation unit; a limiter which updates a DC voltage command lower limit limiter on the basis of the lower limit limiter operation value calculated by the limiter adjustment unit; a maximum power point follow-up control unit which performs a maximum power point follow-up control on the basis of DC power generated by the solar panels to calculate a first DC voltage command value, and determines a second DC voltage command value on the basis of the calculated first DC voltage command value and the DC voltage command lower limit limiter set in the limiter; and an inverter control unit which controls an inverter in the power conversion device on the basis of the second DC voltage command value determined by the maximum power point follow-up control unit.

IPC Classes  ?

• H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
• G05F 1/67 - Regulating electric power to the maximum power available from a generator, e.g. from solar cell

Abstract

Provided is a rolling risk presentation device that can present a rolling risk to an operator in a rolling plant such that countermeasures for suppressing and preventing the occurrence of an alarm are taken prior to rolling. The rolling risk presentation device comprises a system database, an alarm history information classification unit, an occurrence probability calculation unit, and a rolling risk presentation unit. The system database stores alarm history information including alarms generated in the past during rolling. The alarm history information classification unit classifies and organizes the alarm history information, that is stored in the system database, by each type of material to be rolled and product size. The occurrence probability calculation unit statistically calculates the number of occurrences of each alarm classified and organized by the alarm history information classification unit for each type of material to be rolled and product size, and calculates the probability of occurrence of each alarm. The rolling risk presentation unit displays the occurrence probability calculated by the occurrence probability calculation unit for each alarm, and thereby presents, to the operator in the rolling plant and before rolling of the material to be rolled, the rolling risks that may occur during rolling of the material to be rolled.

IPC Classes  ?

• B21B 38/00 - Methods or devices for measuring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
• B21B 33/00 - Safety devices not otherwise provided forBreaker blocksDevices for freeing jammed rolls
• G05B 23/02 - Electric testing or monitoring

Abstract

In the present invention, a first communication line (F1) transmits a control signal (S) from an interface circuit (34) to an n-th drive circuit (GDn) in sequence via a first drive circuit (GD1). A second communication line (F2) transmits a semiconductor switch state detection signal (DS) from the n-th drive circuit (GDn) to the interface circuit (34) in sequence via the first drive circuit (GD1). An i-th drive circuit (GDi) includes a driver for driving an i-th semiconductor switch (SWi) in response to the control signal (S), an abnormality detection circuit for detecting an abnormality of the i-th semiconductor switch (SWi), and first and second notification members (A1, A2). The abnormality detection circuit detects an abnormality of the i-th semiconductor switch (SWi) on the basis of the control signal (S) and an operating state of the i-th semiconductor switch (SWi) and notifies of the detection result by using the first notification member (A1). The abnormality detection circuit generates state detection signals indicating operating states of the i-th to the n-th semiconductor switches (SWi to SWn), detects mismatch between the control signal (S) and the operating states of the i-th to the n-th semiconductor switches (SWi to SWn) on the basis of the control signal (S) and the state detection signals, and notifies of the detection result by using the second notification member (A2).

IPC Classes  ?

• H02H 7/00 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
• H02H 3/05 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection Details with means for increasing reliability, e.g. redundancy arrangements
• H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over

Abstract

A power supply device according to the embodiment supplies DC power to an electrolytic cell that generates hydrogen through electrolysis. This power supply device comprises: a self-excited power converter including a first output terminal and a second output terminal that outputs a positive voltage with respect to the first output terminal; a reactor serially connected to at least one of the first output terminal and the second output terminal; and a filter circuit connected between an anode and a cathode of the electrolytic cell. The filter circuit is a low-pass filter. The cutoff frequency of the filter circuit is set to be lower than the switching frequency of the power converter.

IPC Classes  ?

• C25B 9/65 - Means for supplying currentElectrode connectionsElectric inter-cell connections
• H02M 7/02 - Conversion of AC power input into DC power output without possibility of reversal

Abstract

The purpose of the present disclosure is to provide an active gas generation device capable of supplying a high-concentration active gas. In an active gas generation device (5) according to the present disclosure, a first number of high-voltage electrode structures (13) are each held inside a holding space (S54) of a corresponding groove (54) among a first number of grooves (54), and a second number of grounding electrode structures (14, 3, 4) are each held inside a holding space (S54) of a corresponding groove (54) among a second number of grooves (54). The first number of high-voltage electrode structures (13) and the second number of grounding electrode structures (14, 3, 4) are alternately disposed in a Y-direction. A first planar region of each of the first number of high-voltage electrode structures (13) and a second planar region of each of the second number of grounding electrode structures (14, 3, 4) face each other with a separation space (S56) therebetween.

IPC Classes  ?

• H05H 1/24 - Generating plasma

Abstract

Provided is a camber control device for a continuous rolling mill, capable of reducing a camber in a tip part of a rolling material and suppressing the occurrence of telescoping of a steel strip coil. In this invention, a tip camber measurement unit calculates a tip camber measurement value at a rolling material tip part on the basis of a meandering amount of the rolling material detected by a meandering amount detector. A camber rectification leveling computation unit calculates a camber rectification leveling amount on the basis of the tip camber measurement value. A tip leveling setting unit sets a tip leveling control length and a tip leveling correction amount for reducing the tip camber for a reduction leveling device of each rolling stand. A reduction leveling control unit adjusts the reduction leveling device to a tip-leveling-correction-amount-added position before the rolling material enters the each rolling stand and adjusts the position of the reduction leveling device in such a manner that the tip leveling correction amount gradually decreases after the rolling length at the each rolling stand has reached the tip leveling control length.

IPC Classes  ?

• B21B 37/58 - Roll-force controlRoll-gap control
• B21B 37/68 - Camber or steering control for strip, sheets or plates, e.g. preventing meandering
• B21B 38/04 - Methods or devices for measuring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring thickness, width, diameter or other transverse dimensions of the product
• B21C 51/00 - Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses

Abstract

An assembly jig for a power conversion apparatus, comprising: a pair of fixing portions (11, 15) arranged so as to oppose each other in a first direction orthogonal to an up-down direction; and a supporting member (21) which is provided so as to be attachable from below to a pair of insulating frames (121, 122) fixed to the pair of fixing portions (11, 15) so as to oppose each other in a second direction orthogonal to the up-down direction and first direction and which is for supporting, in the state of being attached to the pair of insulating frames (121, 122), heat dissipation plates and power semiconductor elements that are alternately arranged to be stacked in the first direction between the pair of insulating frames (121, 122), wherein the supporting member (21) comprises a guide portion that, when the heat dissipation plates and power semiconductor elements having been stacked are pressure-welded to each other in the first direction, guides the movements of the heat dissipation plates and power semiconductor elements in the first direction.

IPC Classes  ?

• H01L 23/40 - Mountings or securing means for detachable cooling or heating arrangements
• H01L 25/10 - Assemblies consisting of a plurality of individual semiconductor or other solid-state devices all the devices being of a type provided for in a single subclass of subclasses , , , , or , e.g. assemblies of rectifier diodes the devices having separate containers
• H01L 25/11 - Assemblies consisting of a plurality of individual semiconductor or other solid-state devices all the devices being of a type provided for in a single subclass of subclasses , , , , or , e.g. assemblies of rectifier diodes the devices having separate containers the devices being of a type provided for in subclass
• H01L 25/18 - Assemblies consisting of a plurality of individual semiconductor or other solid-state devices the devices being of types provided for in two or more different main groups of the same subclass of , , , , or

Abstract

The present disclosure provides a low-cost power conversion system that allows for lower loss and less space to be required. The power conversion system comprises: a power converter that converts DC power inputted from a DC power supply to AC power or DC power; a capacitor provided between a positive pole DC line and a negative pole DC line connected to an input terminal of the power converter; a ground line that connects the negative pole DC line and a ground potential and that is provided with a first grounding resistor; a discharge line that connects the positive pole DC line and the ground line on the ground potential side of the first grounding resistor; and a discharge switch that is provided in the discharge line and is turned ON when discharging the residual charge in the capacitor.

IPC Classes  ?

• H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode

Abstract

A design assistance device (2) is configured to comprise: a data acquisition unit (11) for acquiring, as candidate design data for an electric motor, a plurality of pieces of candidate design data that include a plurality of design parameters, and acquiring a first evaluation value for each of the plurality of pieces of candidate design data; and a data generation unit (13) that selects, from among the plurality of pieces of candidate design data acquired by the data acquisition unit (11), some pieces of candidate design data from the first place in the descending order of the first evaluation value as a plurality of pieces of first candidate design data and generates, from the plurality of pieces of first candidate design data, a plurality of pieces of second candidate design data including the plurality of design parameters. In addition, the design assistance device (2) comprises: an evaluation value calculation unit (14) that calculates a second evaluation value for each piece of the first candidate design data on the basis of the plurality of design parameters contained in this piece of the first candidate design data and calculates the second evaluation value for each piece of the second candidate design data on the basis of the plurality of design parameters contained in this piece of the second candidate design data; and a design data selection unit (15) for using the second evaluation values calculated by the evaluation value calculation unit (14) to select, from among the plurality of pieces of first candidate design data and the plurality of pieces of second candidate design data, candidate design data to be used as the design data for the electric motor.

IPC Classes  ?

• G06F 30/20 - Design optimisation, verification or simulation
• G06F 111/06 - Multi-objective optimisation, e.g. Pareto optimisation using simulated annealing [SA], ant colony algorithms or genetic algorithms [GA]

Abstract

This electric power conversion control device comprises: an optical fiber; an optical detection part; and a protection control part. The optical fiber is formed to guide light taken in through the side surface of an extending light guide part in the extension direction and to output the light from an end of the light guide part. The optical detection part detects the light guided to the end of the light guide part. When the optical detection part has detected light resulting from an accident accompanied by arc flash, the protection control part halts electric power conversion carried out by an electric power converter relating to the optical fiber.

IPC Classes  ?

• G01R 31/00 - Arrangements for testing electric propertiesArrangements for locating electric faultsArrangements for electrical testing characterised by what is being tested not provided for elsewhere

Abstract

Provided is an EV charging facility comprising: a plurality of charging stands that, by being attachably/detachably connected to EVs, charge power storage devices mounted to the connected EVs; a plurality of power supply circuits that convert power fed from a power system side into DC power corresponding to the EVs and feed the converted DC power to any of the charging stands; a charging and discharging stand that, by being attachably/detachably connected to an EV, charges and discharges a power storage device mounted to the connected EV; and a bidirectional converter that performs bidirectional power conversion in a direction in which the power storage device of the EV connected to the charging and discharging stand is charged and a direction in which the power storage device of the EV connected to the charging and discharging stand is discharged. Accordingly, it is possible to provide an EV charging facility which comprises a plurality of charging stands and which can reduce contracted power with a simpler configuration, and an operation method therefor.

IPC Classes  ?

• H02J 3/46 - Controlling the sharing of output between the generators, converters, or transformers

Abstract

According to one embodiment of the present invention, an inverter apparatus (100) comprises: a power converter (101) for an armature winding; a power converter (102) for a field winding; a velocity control unit (110) which controls three-phase current on dq-axes; a field current control unit (120) which controls field winding current; a simulator (130); and a damper winding failure detection device (200). The damper winding failure detection unit (200) has: a switching unit (210) which switches between a normal operation mode and a failure inspection mode; an inspection current command value generation unit (220) which outputs an AC as a q-axis current command and outputs a DC equivalent value as a d-axis current command in the failure inspection mode; and an inspection time measurement/determination unit (230) which measures a response in a field winding (13) and determines, from a response signal, the presence or absence of anomaly in the damper winding.

IPC Classes  ?

• H02P 23/00 - Arrangements or methods for the control of AC motors characterised by a control method other than vector control
• H02P 6/32 - Arrangements for controlling wound field motors, e.g. motors with exciter coils
• H02P 25/022 - Synchronous motors

Abstract

This electromagnetic wave detection device detects electromagnetic waves from an electromagnetic wave generation source (100) in a first space A in which the electromagnetic wave generation source (100) is disposed and a second space B that is divided by a partitioning plate (200) which attenuates the propagation of electromagnetic waves. The electromagnetic wave detection device comprises an electromagnetic wave observation part (10) comprising a metal wire including: a penetration section (11) that penetrates through a through hole (200A) formed in the partitioning plate (200) while being spaced apart from a peripheral wall of the through hole; a protrusion section (12) that protrudes from the penetration section (11) toward the first space A, and receives electromagnetic waves from the electromagnetic wave generation source (100); and an extension section (13) that extends from the penetration section (11) into the second space B. One end of the electromagnetic wave observation part that is positioned on the second space B side is connected to a ground contact point (300) positioned on the second space B side.

IPC Classes  ?

• G01R 29/08 - Measuring electromagnetic field characteristics
• G01R 31/12 - Testing dielectric strength or breakdown voltage

Abstract

The present disclosure provides a hot rolling mill plate thickness control device capable of reliably threading a tip end portion of material being rolled, without increasing equipment costs, even if the material being rolled is being rolled to be extremely thin. The hot rolling mill plate thickness control device comprises: a plate thickness gauge installed on an exit side of a final rolling stand in a row-arrangement direction; a gap calculating unit for calculating a gap between rolls of each rolling stand, said gap being greater than a product target plate thickness of the material being rolled and corresponding to a threadable plate thickness with which the tip end portion of the material being rolled can be stably threaded; a gap setting unit for setting the gap calculated by the gap calculating unit for each rolling stand; an automatic plate thickness control unit for executing automatic plate thickness control to minimize a plate-thickness deviation between a plate thickness measured value from the plate thickness gauge and the threadable plate thickness; and a target plate thickness changing unit for changing the threadable plate thickness to the product target plate thickness by adding a plate-thickness bias to the plate-thickness deviation with a predetermined ramp rate, after the tip end portion of the material being rolled has been threaded through the final rolling stand.

IPC Classes  ?

• B21B 37/20 - Automatic gauge control in tandem mills

Abstract

This control device comprises: a first action control unit that causes a DC switch to open when a power conversion device is in a standby state and when a first DC voltage value acquired by a voltage acquiring unit has become greater than a predetermined first threshold; a clock unit that, when the DC switch is opened by the first action control unit, clocks the elapsed time after the DC switch has been opened; and a soundness determining unit that when the DC switch is opened while the power conversion device is in the standby mode and when the elapsed time period clocked by the clock unit has reached or exceeded a predetermined first time period, calculates a first differential voltage value that is the difference between the first DC voltage value acquired by the voltage acquiring unit and a second DC voltage value, determines that the DC switch is normal when the first differential voltage value is greater than a predetermined second threshold, and determines that the DC switch is abnormal when the first differential voltage value is equal to or less than the predetermined second threshold.

IPC Classes  ?

• H02H 7/122 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for convertersEmergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for rectifiers for static converters or rectifiers for inverters, i.e. DC/AC converters
• G01R 31/327 - Testing of circuit interrupters, switches or circuit-breakers
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers

Abstract

The daisy chain communication path of this power conversion system connects a master station that controls a plurality of slave stations each including a power conversion device and the plurality of slave stations to each other. The plurality of slave stations are configured so as to supply power from the power conversion device within each slave station to each load device. The plurality of slave stations switch between "operation" for supplying power from the power conversion devices and "stop" for interrupting the supply of the power to supply the power to the respective load devices. The daisy chain communication path forms a set of a first communication path for sending a control signal α and a second communication path for sending an operation permission signal β. When detecting a communication failure, each of the plurality of slave stations "stops" the supply of power to the power conversion device of a relevant slave station that has detected the communication failure and controls the other slave stations among the plurality of slave stations using the control signal α and the operation permission signal β to "stop" the supply of the power to the power conversion devices of the other slave stations. After that, in a state in which the power supply from each power conversion device is "stopped", the whole or a part of the plurality of slave stations notify, using the control signal α, the master station of information about a failure location in which the failure location is identifiably specified.

IPC Classes  ?

• H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
• H02M 7/49 - Combination of the output voltage waveforms of a plurality of converters

Abstract

This DC power distribution system comprises a DC bus line (100) distributing DC power, a first power converter (CPL), and a voltage stabilizing device (10). The first power converter (CPL) is connected between the DC bus line (100) and a load and converts the DC power from the DC bus line (100) to the power required by the load. The voltage stabilizing device (10) is connected to the DC bus line (100) in parallel with the first power converter (CPL). The voltage stabilizing device (10) supplies power to the DC bus line (100) in accordance with the variation of an input voltage input from the DC bus line (100) to the first power converter (CPL) and the DC power supplied from the DC bus line (100) to the first power converter (CPL).

IPC Classes  ?

• H02J 1/00 - Circuit arrangements for dc mains or dc distribution networks

Abstract

This sheet width control device is applicable to a reversing rolling mill that comprises: an edger that has a pair of edger rolls that perform edge rolling on a material being rolled; and a horizontal rolling mill that is disposed downstream of the edger and has a pair of horizontal rolls that perform horizontal rolling on the material being rolled. The sheet width control device comprises a reduction control device, a reduction position detector, a tracking device, and a sheet width actual value calculation device. The reduction control device is configured to cause the edger to operate such that the pair of edger rolls make contact with the material being rolled during reverse pass rolling. The reduction position detector is configured to detect the reduction position of the edger when the pair of edger rolls are in contact with the material being rolled during reverse pass rolling. The tracking device is configured to track the position in the longitudinal direction of the material being rolled during reverse pass rolling. The sheet width actual value calculation device is configured to calculate a sheet width actual value for the material being rolled at a plurality of positions in the longitudinal direction on the basis of the output of the reduction position detector and the output of the tracking device.

IPC Classes  ?

• B21B 38/04 - Methods or devices for measuring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring thickness, width, diameter or other transverse dimensions of the product
• B21B 37/00 - Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
• B21B 37/22 - Lateral spread controlWidth control, e.g. by edge rolling

Abstract

This method for assisting operation in a rolling line comprises a step for acquiring various data related to a rolled product manufactured on the rolling line. The method comprises: a step for calculating, for each product specification and on the basis of the various data, an occurrence rate of errors occurring in at least one of the quality of a rolled product, the operating status of a rolling line, and operator operations on actuators of the rolling line; and a step for setting, for each product specification and in accordance with how high the occurrence rate is, the manufacturing difficulty of the rolled product. The method further comprises a step for outputting assistance data from an operator terminal to assist an operator who is involved in a manufacturing process of an object to be manufactured on the rolling line, the assistance data comprising, as data on the manufacturing difficulty of the object to be manufactured, data on the manufacturing difficulty of a rolled product having the same product specifications as the product specifications of the object to be manufactured.

IPC Classes  ?

• B21B 37/00 - Control devices or methods specially adapted for metal-rolling mills or the work produced thereby

Abstract

The present disclosure provides a plate thickness control method for a rolling mill whereby it is possible to calculate an appropriate gap correction amount for the rolling mill on the basis of the amount of change in a rolling load between a previous material and a material in question, and to thus improve plate thickness precision. The plate thickness control method for a rolling mill includes: a step in which a rolled coil rolled immediately beforehand by a rolling mill is designated as a previous material, a rolled coil rolled after the previous material is designated as a material in question, the relationship between the amount of change in a rolling load between the previous material and the material in question and the amount of change in a gap error regarding the rolling mill is approximated sequentially by means of a regression model, and a gap error in the rolling of the material in question is predicted on the basis of the regression model; a step in which a gap setting amount in rolling of the material in question is corrected on the basis of the predicted value of the gap error; and a step in which a regression coefficient of the regression model is updated on the basis of the actual rolling load obtained by rolling the material in question and the amount of change in the actual gap error.

IPC Classes  ?

• B21B 37/58 - Roll-force controlRoll-gap control
• B21B 37/20 - Automatic gauge control in tandem mills
• B21B 37/64 - Mill spring or roll spring compensation systems, e.g. control of prestressed mill stands

Abstract

A winding control system according to one embodiment comprises: a motor drive control device that controls the driving of a motor which rotationally drives a mandrel for winding a rolled material around a coil; a tail end sensor that detects one point of the rolled material to thereby output a detection signal indicating that the rolled material passes through a tail end; a winding control device that tracks the position of the tail end; a first camera that is provided between the finishing roll mill and the mandrel and captures images for first image data including information about the shape of the tail end; and an image analysis device that performs image analysis on the first image data at a timing at which the detection signal is emitted, generates a correction value for correcting the position of the tail end on the basis of a result of the image analysis of the image data, and outputs the correction value to the winding control device. The winding control device corrects the position of the tail end by using the correction value.

IPC Classes  ?

• B21C 47/02 - Winding-up or coiling
• B21C 51/00 - Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses

Abstract

The power supply device according to an embodiment comprises: a power conversion unit including first input terminals, a first capacitor connected between the first input terminals, a first output terminal that supplies output current to an electromagnet, a first power conversion circuit connected between the capacitor and the output terminal, and first wiring that electrically connects the capacitor and the power conversion circuit to each other; and a control device that controls the power conversion unit on the basis of current command values sequentially supplied from the outside. The control device detects the sequential two maximal current values or sequential two minimal current values of the current command values to estimate the frequency of the output current.

IPC Classes  ?

• H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode

Abstract

The present disclosure provides a thickness schedule calculation method and a rolling plant that make it possible to calculate and set a limit value for a limit check that is preferable for maintaining a stable rolling and operating state with reduced rolling troubles. The thickness schedule computing method comprises a computing step of computing a thickness schedule by using a rolling model formula including a forward slip model and a rolling load model, on the basis of a rolling load or motor power. The computing step includes a calculating step of calculating at least one of an upper limit value and a lower limit value of the rolling reduction ratio in each rolling stand on the basis of past rolling data, for each product specifications including a steel type category for rolling and a thickness category, and a setting step of setting at least one of the upper limit value and the lower limit value calculated in the calculating step as a limit value for a limit check with respect to the rolling reduction ratio.

IPC Classes  ?

• B21B 37/20 - Automatic gauge control in tandem mills
• B21B 37/00 - Control devices or methods specially adapted for metal-rolling mills or the work produced thereby

Abstract

In the present invention, a command value limiter applies limits to command values which are issued by a host device and which are for charging power and discharging power. A drive signal generator generates a drive signal for an inverter circuit in accordance with a command value for charging power limited by the command value limiter or a command value for discharging power limited by the command value limiter. A PI controller, in response to a direct-current voltage that is applied to the inverter circuit being higher than the working voltage of a charging limiter, calculates a PI control value (a PI control value for limiting charging) for the deviation between the direct-current voltage and the working voltage of the charging limiter and, in response to the direct-current voltage being lower than the working voltage of a discharging limiter, calculates a PI control value (a PI control value for limiting discharging) for the deviation between the direct-current voltage and the working voltage of the discharging limiter. A limiter regulator strengthens limitation of the command value for charging power from the command value limiter in accordance with the PI control value for limiting charging and strengthens limitation of the command value for discharging power from the command value limiter in accordance with the PI control value for limiting discharging.

IPC Classes  ?

• H02J 3/32 - Arrangements for balancing the load in a network by storage of energy using batteries with converting means
• H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode

Abstract

An insulation diagnosis device according to an embodiment performs insulation diagnosis for a three-phase alternate-current motor on the basis of a U-phase current, a V-phase current, and a W-phase current supplied to the three-phase alternate-current motor, the insulation diagnosis device comprising: a current vector calculation unit (23, 24) that calculates at least one of a zero-phase current vector or a negative-phase current vector on the basis of the U-phase current, the V-phase current, and the W-phase current; a reference current vector storage unit (25) that pre-stores a reference current vector; a current difference vector calculation unit (26) that calculates a current difference vector, which is the difference between the current vector calculated by the current vector calculation unit (23, 24) and the reference current vector; and a determination unit (28) that determines the insulation state of the three-phase alternate-current motor on the basis of the current difference vector.

IPC Classes  ?

• G01R 31/34 - Testing dynamo-electric machines
• G01R 31/12 - Testing dielectric strength or breakdown voltage
• G01R 31/52 - Testing for short-circuits, leakage current or ground faults

Abstract

The present disclosure provides a system for controlling cutting by a crop shear, the system being capable of suppressing cutting errors in a cut material at a set cutting point to the extent possible even if the speed of the cut material varies. This system for controlling cutting by a crop shear, which cuts a cut material being transported on a hot-rolling line, comprises an image detector that detects an image of the cut material being transported, the image detector being disposed on the input side of the crop shear. A tip end position or tail end position of the cut material and the movement amount of the cut material are established from the image data detected by the image detector, and the drive speed of cutting blades of the crop shear is adjusted on the basis of the established tip end position or tail end position and movement amount of the cut material.

IPC Classes  ?

• B23D 36/00 - Control arrangements specially adapted for machines for shearing or similar cutting, or for sawing, stock while the latter is travelling otherwise than in the direction of the cut

Abstract

In the event of power interruption of a commercial AC power source (6), this uninterruptible power supply device: controls a bidirectional chopper (2) such that a DC voltage (VD) between DC lines (L1, L3) becomes a second reference voltage (VDR 2) higher than a first reference voltage (VDR 1) for a prescribed time (Tc); and then controls the bidirectional chopper (2) such that the DC voltage becomes the first reference voltage. Accordingly, during power interruption, a battery current (IB) can be temporarily increased above usual, and even when a small-sized capacitor (C1 to C4) is used, it is possible to prevent the DC voltage from dropping below a lower limit voltage (VDL).

IPC Classes  ?

• H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over

Abstract

Provided is a control device of a power conversion device, said power conversion device comprising: at least one alternating-current capacitor that is disposed in a capacitor circuit which branches from an alternating-current circuit on an output side of an inverter, and that is disconnected from the circuit during a failure; and an electric current sensor that is disposed in the capacitor circuit, and that acquires an electric current value of an alternating-current electric current of each phase flowing to the alternating-current capacitor. The control device comprises: an amplitude calculation unit that acquires, from the electric current sensor, the electric current value of the alternating-current electric current of each phase flowing to the alternating-current capacitor, and that calculates, on the basis of the acquired electric current value of the alternating-current electric current of each phase, a value of an amplitude of a fundamental wave component of the alternating-current electric current of each phase; and a failure determination unit that compares the sizes of a prescribed determination value and the value of the amplitude of the fundamental wave component of the alternating-current electric current of each phase calculated by the amplitude calculation unit, and that determines that there is a failure of the alternating-current capacitor if the value of the amplitude of at least one phase among the values of the amplitude of the fundamental wave component of the alternating-current electric current of the phases is less than the prescribed determination value.

IPC Classes  ?

• H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode

Abstract

The present invention provides a SCADA web HMI system that can prevent delay in updates of display on screens of HMI client machines and stoppage of a server machine even when a processing load on the server machine is large. A SCADA server machine comprises a communication driver and a client management unit that is connected one-to-one with HMI client machines. The client management unit comprises: a reception thread that receives signal data from the communication driver; first and second signal data buffers that can store the signal data, which is received by the reception thread, in association with a signal data identifier for each data type; and a transmission thread that reads signal data stored in the first or second signal data buffer, and transmits the read signal data to an HMI client machine. While the transmission thread is reading signal data from one of the first and second signal data buffers and transmitting the read signal data to an HMI client machine, signal data stored in the other one of the first and second signal data buffers is overwritten.

IPC Classes  ?

• H04L 67/5651 - Reducing the amount or size of exchanged application data
• H04Q 9/00 - Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom

Abstract

A control panel according to an embodiment comprises a housing, an article placement board, and a pull-out mechanism. The front surface of the housing is open. The article placement board is disposed along the front-back direction inside the housing, and has articles attached thereto. The pull-out mechanism pulls out the article placement board in the forward direction while maintaining the orientation thereof when housed inside the housing. The present invention provides a control panel with which it is possible to effectively use the space inside the housing, improve ease of use, and support flexible article placement.

IPC Classes  ?

• H05K 7/18 - Construction of rack or frame
• H02B 1/36 - Racks with withdrawable units

Abstract

This electric power conversion unit is provided with a housing, a plurality of fans, a heat sink, and a plurality of semiconductor elements. The fans cause an air flow inside the housing. The heat sink forms an air flow passageway upstream of an air circulation path inside the housing. The plurality of semiconductor elements are arranged side-by-side along a direction transverse to the air circulation direction of the heat sink on an element arrangement surface of the heat sink.

IPC Classes  ?

• H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
• H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode

Abstract

This phase synchronization control circuit (12) comprises: a phase difference detector (20) that detects a phase difference (Δθ) between an AC voltage (VI) and an AC signal (vac); a frequency control unit (21) that generates a first frequency control value (Fc1) such that the phase difference disappears; a frequency limiter (25) that limits the first frequency control value (Fc1) within a variable limit range and generates a second frequency control value (Fc2); a limiter control unit (26) that sets the variable limit range on the basis of the phase difference, and reduces the width of the variable limit range in accordance with a reduction of the phase difference; and an oscillator (28) that generates an AC signal of a frequency that takes a value that corresponds to the second frequency control value. Accordingly, overshoot of the frequency of the AC signal can be kept low.

IPC Classes  ?

• H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
• H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over
• H03L 7/08 - Details of the phase-locked loop

Abstract

A rotating electric machine (10) according to an embodiment comprises a housing (13), a bearing (15), and a cylindrical member (17). The bearing (15) rotatably supports a shaft (14) around a rotating central axis (Ax). The cylindrical member (17) has an oil thrower portion (17m) and a seal portion (17n) which are integrally formed. The oil thrower portion (17m) is cylindrically formed around the rotating central axis (Ax), and the shaft (14) is inserted into the inside thereof. The oil thrower portion (17m) is separated from the outer circumferential surface (14a) of the shaft (14) with a first space. The seal portion (17n) is positioned opposite the bearing (15) with respect to the oil thrower portion (17m) and is cylindrically formed around the rotating central axis (Ax). The seal portion (17n) is separated from the outer circumferential surface (14a) with a second space smaller than the first space.

IPC Classes  ?

• H02K 5/173 - Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
• F16C 33/66 - Special parts or details in view of lubrication
• F16C 33/78 - Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members

Abstract

An uninterruptible power supply device (100) comprises a compensation power supply circuit (1) and a bypass circuit (20). The bypass circuit is provided electrically in parallel to the compensation power supply circuit. The bypass circuit includes first to third switches (15U-15W) and first to third circuits (17-19). The first to third switches are respectively connected to first to third phases of a three-phase alternating current load. The first to third circuits are respectively provided electrically in parallel to the first to third switches. The first circuit includes a first snubber circuit (17A), a second snubber circuit (17B), and a power line (PL11). The second circuit includes a first snubber circuit (18A), a second snubber circuit (18B), and a power line (PL12). The third circuit includes a first snubber circuit (19A), a second snubber circuit (19B), and a power line (PL13). The respective power lines (PL11, PL12, and PL13) of the first to third circuits are electrically connected to each other.

IPC Classes  ?

• H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over
• H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode

Abstract

A plurality of connection members (10, 20) are connected to an electric apparatus and extend in a first direction perpendicular to a vertical direction. A plurality of terminal members (30, 40) are respectively attached to the plurality of connection members (10, 20) and have a plurality of electric wires respectively connected thereto. The plurality of terminal members (30, 40) respectively include fixing portions (31, 41) and connection portions (32, 42). The fixing portions (31, 41) are attached to the connection members (10, 20) and extend in the first direction. The connection portions (32, 42) are connected to one end portions of the fixing portions (31, 41) in a longitudinal direction and have the electric wires connected thereto. The connection portions (32, 42) extend in a direction orthogonal to the direction in which the fixing portions (31, 41) extend. The plurality of terminal members (30, 40) are respectively attached to the connection members (10, 20) in either a first posture in which the connection portions (32, 42) extend upward in the vertical direction or a second posture in which the connection portions (32, 42) extend downward in the vertical direction.

IPC Classes  ?

• H02B 1/20 - Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards
• H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over

Abstract

A rack (110) comprises a first to a fourth column members (11 to 14), and a first and a second guide members (15A, 15B). A casing of an electric device (20) has a first and a second side surfaces in the width direction that are respectively supported by the first and second guide members (15A, 15B). A first and a second regulation members (30A, 30B) are respectively attached to the inner surfaces of the first and second side surfaces of the casing to regulate movement of the casing toward the front of the rack (110). The second regulation member (30B) is opposed and attached to the first regulation member (30A) in the width direction. In a state in which the electric device (20) is housed in the rack (110), the first regulation member (30A) is positioned between the first and third column members (11, 13) in a fore-aft direction. The second regulation member (30B) is positioned between the second and fourth column members (12, 14) in the fore-aft direction.

IPC Classes  ?

• H05K 7/18 - Construction of rack or frame

Abstract

The purpose of the present invention is to obtain an active-gas-generating apparatus that can supply high-concentration active gas from a gas jetting port to a downstream process space. In the active-gas-generating apparatus (51) of the present disclosure, a region in which electrically conductive films for electrodes (31, 41) overlap as seen in plan view within a main dielectric space, which is the space in which a dielectric film for electrodes (30) and a dielectric film for electrodes (40) face each other, is defined as a main discharge space (50). A region including a dielectric through-port (14) and a cover through-port (15) within an auxiliary dielectric space, which is the space in which the dielectric film for electrodes 30 and a shield dielectric film 8 face each other, is defined as an auxiliary discharge space (58). The auxiliary discharge space (58) includes a portion of a buffer space (9) above the shield dielectric film (8), and a path that reaches from the auxiliary discharge space (58) to gas jetting ports (61, 62) is defined as the active gas flow path.

IPC Classes  ?

• H05H 1/24 - Generating plasma

Abstract

This power conversion system control device comprises: a power converter connected to a power source or to a capacitor via wiring; a coil disposed in a position which is around the wiring and at which, when a short circuit failure has occurred because of voltage in the capacitor or in the power source being short-circuited, magnetic fluxes generated by the short circuit failure are interlinked; and a voltage detection circuit for detecting the voltage value of voltage between both ends of the coil. The power conversion system control device further comprises: a voltage acquisition unit for acquiring the voltage value of voltage between both ends of the coil detected by the voltage detection circuit; and a failure detection unit for detecting a short circuit failure of the power converter on the basis of the voltage value acquired by the voltage acquisition unit.

IPC Classes  ?

• H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode

Abstract

According to the present invention, a rolling productivity improvement assistance device for a plant that rolls an iron/non-iron material comprises a data collection unit that collects plant data that includes a production plan, production results, and an operating state from the plant, an indicator calculation unit that, for the plant data acquired by the data collection unit, calculates a productivity, factors for the productivity, and a value for an indicator for each of the factors, a data storage unit that stores the plant data acquired by the data collection unit and indicator data that is data for the values of the indicators calculated by the indicator calculation unit, a productivity evaluation unit that, each time plant data has been gathered, compares the indicators for a productivity to be evaluated with results for the indicators for past productivities to evaluate productivity decline, and a display unit that displays the results of the productivity decline evaluation by the productivity evaluation unit, the productivity that was the basis for the evaluation results, the factors for the productivity, and the value of the indicator for each of the factors.

IPC Classes  ?

• B21B 37/00 - Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
• B21B 38/00 - Methods or devices for measuring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
• G05B 19/418 - Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]

Abstract

The purpose of the present invention is to: when a sensor failure occurs during plant operations, provide support by comparing amounts of decrease in production quantity for various possible operational actions and performing guidance display of operation actions which are optimal from the perspective of productivity; and minimize the amount of decrease in production quantity. To accomplish this, this plant operation support system performs a guidance display of provisional action information in a case in which, in a state in which a sensor has failed, the post-provisional action production quantity, for when a provisional action is implemented on the plant and operations are continued in accordance with provisional action information for continuing operations of the plant, is greater than or equal to the post-replacement production quantity, for when restarting operations after work for replacing the failed sensor with a normal sensor is performed.

IPC Classes  ?

• G05B 23/02 - Electric testing or monitoring

Abstract

This plate crown control device controls tandem rolling equipment on the basis of an outlet plate crown setting calculation value of each stand as calculated by setting calculation, a mechanical plate crown setting calculation value of each stand, and a bending force and shift position setting value of each stand. A processor calculates a first current learning value on the basis of the difference between a mechanical plate crown observation value and a mechanical plate crown result calculation value. The processor proportionally divides a first learning value by the first current learning value and a smoothing gain and updates the first learning value. The processor, in the next setting calculation and thereafter, calculates the bending force and shift position setting value of each stand by using a corrected mechanical plate crown setting calculation value obtained by adding the first learning value to the mechanical plate crown setting calculation value.

IPC Classes  ?

• B21B 37/38 - Control of flatness or profile during rolling of strip, sheets or plates using roll bending
• B21B 37/28 - Control of flatness or profile during rolling of strip, sheets or plates

Abstract

This load current distribution adjusting device for a storage battery power conversion device comprises: a cross current calculation unit for calculating the cross current of a relevant power conversion device on the basis of an average current of the output currents of a plurality of storage battery power conversion devices performing an autonomous parallel operation and the output current of the relevant power conversion device; a first correction amount calculation unit for calculating a first correction amount of a voltage command value on the basis of the cross current calculated by the cross current calculation unit and the output voltage of the relevant power conversion device; a gain calculation unit for calculating a weighted gain of the relevant power conversion device on the basis of an average voltage of the respective DC voltages of the plurality of storage battery power conversion devices and the DC voltage of the relevant power conversion device; a second correction amount calculation unit for calculating a second correction amount of the voltage command value on the basis of the first correction amount calculated by the first correction amount calculation unit and the weighted gain calculated by the gain calculation unit; and an output current control unit for controlling the output current of the relevant power conversion device on the basis of a predetermined voltage command value and the second correction amount calculated by the second correction amount calculation unit.

IPC Classes  ?

• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02J 7/02 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
• H02J 7/34 - Parallel operation in networks using both storage and other DC sources, e.g. providing buffering
• H02J 3/46 - Controlling the sharing of output between the generators, converters, or transformers
• H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over

Abstract

This uninterruptible power supply apparatus 1 comprises an operation unit (11) for setting a second reference voltage (VBR), a computation unit (21) for establishing a first reference voltage (VDR) that is higher than the set second reference voltage and lower than a maximum value (VDRmax) for the first reference voltage, a first reference voltage generation unit (22) for generating the first reference voltage established by the computation unit, and a second reference voltage generation unit (32) for generating the second reference voltage set by the operation unit. Therefore, the voltage (VD) of a DC line (4) can be reduced below the maximum value for the first reference voltage, and the efficiency of the uninterruptible power supply apparatus 1 can be improved.

IPC Classes  ?

• H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over

Abstract

A detection device according to an embodiment of the present application detects the presence or absence of a workpiece adhered to the inner wall of a drum of a mill for crushing minerals. This detection device stores an initial torque detected at a preset initial rotation angle, calculates a maximum torque on the basis of the initial torque, the initial rotation angle, and a rotation angle greater than the initial rotation angle, calculates the ratio of the torque at the rotation angle divided by the maximum torque, compares the ratio to a preset threshold, and determines that there is a workpiece adhered to the inner wall of the drum if the ratio is equal to or greater than the threshold.

IPC Classes  ?

• B02C 17/18 - Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls Details

Abstract

This SCADA web HMI client device comprises a processor and a memory. The memory stores a user access level, image data of an HMI screen, and screen access right information that are received from a web server. The screen access right information includes an operation access level of the HMI screen and operation possibility of the HMI screen through a web browser. The processor draws the HMI screen on the web browser in an operation possible state when the user access level is equal to or higher than the operation access level and an operation on the HMI screen through the web browser is allowed. The processor draws the HMI screen on the web browser in an operation impossible state when the user access level is lower than the operation access level or the operation on the HMI screen through the web browser is not allowed.

IPC Classes  ?

• G05B 23/02 - Electric testing or monitoring

Abstract

In the present invention, a power converter comprises: an inverter that includes a plurality of switching elements, receives DC voltage from a DC voltage source as an input, converts the received DC voltage to variable-voltage, variable-frequency AC voltage, and outputs the converted AC voltage to a load; a control unit that performs PWM control for driving the plurality of switching elements on or off; and a serial arrangement of a positive-electrode-side capacitor and a negative-electrode-side capacitor connected between a positive electrode and a negative electrode of a DC voltage on the input side of the inverter. The output potential of the inverter has at least: the potential of the positive electrode of the DC voltage source; the potential of the negative electrode; and the potential of the neutral point, which is the connection point between the positive-electrode-side capacitor and the negative-electrode-side capacitor. The control unit includes: a modulation factor calculator that calculates the modulation factor of the inverter on the basis of the DC voltage and an output voltage command value; a gate signal generator that compares the calculated modulation factor and a carrier signal and generates a gate signal necessary for on/off-driving of the switching element for generating a pulse train; and a gate signal allocation unit that adjusts the allocation of the gate signals so that the voltage of the positive-electrode-side capacitor and the voltage of the negative-electrode-side capacitor are balanced.

IPC Classes  ?

• H02M 7/487 - Neutral point clamped inverters

Abstract

This product quality analysis assistance system is applied to a steel plant. In a first process, a plurality of defective waveform patterns determined to be defective in quality are classified into at least one defective waveform pattern group on the basis of similarity. In a second process, a score of correlation with a condition based on product specifications and a process data waveform pattern is calculated for the defective waveform pattern group. In a third process, when the score of correlation indicating characteristics of the defective waveform pattern group is greater than a condition threshold, an input screen including a representative waveform pattern representing the defective waveform pattern group, information according to the score of correlation, and a factor and countermeasure input area is displayed on a monitor.

IPC Classes  ?

• G06Q 50/04 - Manufacturing

Abstract

This SCADA web HMI system draws an HMI screen including a first strip part disposed in a first zone and an extendable second strip part disposed in a second zone. The first strip part and the second strip part are drawn each drawing cycle shorter than the reception cycle of PLC signals. The tip position of the first strip part is calculated each drawing cycle from the time when a first PLC signal is received, on the basis of a transfer speed and an elapsed time included in the first PLC signal. The drawing size of the first strip part is set to the length from the entry side of the first zone to the tip position of the first strip part. Further, if the tip position of the first strip part has not reached the second zone when a second PLC signal is received, the drawing size of the first strip part is set to the zone length of the first zone.

IPC Classes  ?

• G05B 23/02 - Electric testing or monitoring
• B21B 38/00 - Methods or devices for measuring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product

Abstract

In the present invention, a SCADA web HMI system draws an HMI screen including a first rolled part disposed in a first zone and an extensible second rolled part disposed in a second zone. The first rolled part and the second material part are drawn in each drawing period, which is shorter than the PLC signal receiving period. The first rolled part tip position is calculated on the basis of the conveying speed and elapsed time included in the first PLC signal in each drawing period from the time the first PLC signal is received. The size of the drawn first rolled part is set to the length from the entry side of the first zone to the first rolled part tip position. If the first rolled part tip position has not reached the second zone when the second PLC signal has been received, the size of the drawn first rolled part is set to the length of the first zone.

IPC Classes  ?

• G05B 23/02 - Electric testing or monitoring
• B21B 38/00 - Methods or devices for measuring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product

Abstract

This electric motor control device comprises a signal identification unit and an overvoltage detection unit. The signal identification unit includes an optical isolator for converting electric signals supplied through a terminal to which an external device is connected, and furthermore includes a switch for opening a connection circuit connected to the terminal. The overvoltage detection unit is formed so as to open the switch when the voltage applied to the connection circuit exceeds a threshold voltage.

IPC Classes  ?

• H02P 29/024 - Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load

Abstract

Provided is an insulation tape comprising a base layer, two adhesive layers, and two reinforcement layers. The base layer includes a first surface and a second surface on the opposite side of the first surface. The two adhesive layers contain nano-sized silica particles and are overlaid on the first surface and the second surface, respectively. The two reinforcement layers are provided for the first surface and the second surface, respectively, and are adhered to the base layer by the adhesive layers.

IPC Classes  ?

• H02K 3/30 - Windings characterised by the insulating material

Abstract

In the present invention, first and second communication lines (L1, L2) connect, with daisy chains, a plurality of control circuits respectively corresponding to a plurality of UPS modules (U1-U5). The transmission direction of data in the second communication line (L2) is reverse of the transmission direction of data in the first communication line (L1). First communication terminals (Tin1, Tout1) of each of the UPS modules receive, via the first communication line (L1), detection values of AC output currents of the other USP modules and transmit a detection value of an own AC output current to respective other control circuits. Second communication terminals (Tin2, Tout2) of each of the UPS modules receive, via the second communication line (L2), detection values of AC output currents of the other USP modules and transmit a detection value of an own AC output current to the respective other control circuits. The control circuits each generate a current command value on the basis of the detection values of the own AC output currents and the detection values of the AC output currents of the other UPS modules received by the first and/or second communication terminals.

IPC Classes  ?

• H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over

Abstract

Provided is an electric power conversion apparatus comprising: a main circuit unit that converts electric power of a distributed power supply into AC power corresponding to an electric power system; and a control unit that controls an operation of the main circuit unit. The control unit has: an estimated value computation unit that computes an estimated value of a resistance component of system impedance of the electric power system, an estimated value of a reactance component of the system impedance, and an estimated value of a voltage value of an infinite busbar power system, on the basis of an active power value at a connection point to the electric power system, a reactive power value at the connection point, and a voltage value at the connection point; and a reactive power computation unit that computes a reactive power command value of reactive power that is supplied to the electric power system, on the basis of the respective estimated values. The estimated value computation unit has a first estimation unit that computes the respective estimated values using a Kalman filter corresponding to a nonlinear system, and a second estimation unit that computes the respective estimated values using Newton's method. Thus, an electric power conversion apparatus, a control device, and a distributed power supply system that can more appropriately reduce voltage fluctuations at a connection point of a distributed power supply are provided.

IPC Classes  ?

• H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
• H02J 3/18 - Arrangements for adjusting, eliminating or compensating reactive power in networks
• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers

Abstract

Provided is a photovoltaic power generating system comprising: a plurality of solar cell panels; a plurality of power conversion devices which convert DC power supplied from the plurality of solar cell panels into AC power and supply the AC power to electric power systems; and a control device for controlling the operation of the plurality of power conversion devices. The control device has a total output value calculation unit for calculating a total effective power value representing the magnitude of effective power that can be outputted currently from all of the plurality of power conversion devices; a difference calculation unit for calculating a difference between a total upper limit command value and the total effective power value and dividing the difference by the number of the plurality of power conversion devices, thereby calculating a difference for each of the plurality of power conversion devices; and an upper limit command value calculation unit for adding the difference per power conversion device to an effective power value, thereby calculating an individual upper limit command value for each of the plurality of power conversion devices. Accordingly, it is possible to provide a photovoltaic power generating system and a control device which can inhibit excessive lowering of the total value of effective power to be supplied to electric power systems from a plurality of power conversion devices.

IPC Classes  ?

• H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers

Abstract

Provided is a switching device for charging equipment, the switching device comprising: a switching unit that switches connections between each of a plurality of power sources and each of a plurality of charging stations; and a control unit that controls the switching of connections by the switching unit. The switching unit has a plurality of first switching elements provided to correspond to the plurality of power sources, respectively, and a plurality of second switching elements that are provided between each of the plurality of first switching elements and each of the plurality of charging stations, and allow direct-current power, which is supplied from the plurality of power sources through the plurality of first switching elements, to be selectively supplied to each of the plurality of charging stations. The control unit controls switching of each of the plurality of first switching elements and the plurality of second switching elements, thereby controlling the switching of connections by the switching unit. Thus, provided is the switching device for charging equipment that can appropriately switch output locations while curbing increases in the cost of equipment.

IPC Classes  ?

• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02J 7/02 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters

Abstract

Provided is a power supply system for an autonomous system comprising: a plurality of power supply devices; a plurality of voltage-source voltage control power conversion devices that are connected in parallel with an autonomous system, converts the power supplied from the plurality of power supply devices to an AC power corresponding to the autonomous system, and supplies the converted AC power to the autonomous system; and a control device that controls the power conversion operations of the plurality of power conversion devices. The control device calculates the plurality of active power command values of the plurality of power conversion devices according to active powers required in the autonomous system and calculates the plurality of reactive power command values of the plurality of power conversion devices according to reactive powers required in the autonomous system. The plurality of power conversion devices perform voltage control operations so as to output the active powers according to the active power command values and output the reactive powers according to the reactive power command values. This provides the power supply system for the autonomous system capable of stably supplying power to the autonomous system even when the plurality of voltage-source voltage control power conversion devices are operated in parallel.

IPC Classes  ?

• H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
• H02M 7/493 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode the static converters being arranged for operation in parallel

Abstract

First to third capacitors (UC1-UC3) each have an identical rectangular parallelepiped shape. First surfaces (P1) of each of the rectangular parallelepiped capacitors each have first and second sides perpendicular to each other, second surfaces (P2) each have the second and third sides perpendicular to each other, and third surfaces (P3) each have the first and third sides perpendicular to each other. The length of the first sides is two times or greater than and less than three times the length of the third sides. The first and second capacitors (UC1, UC2) are disposed so that the first surfaces (P1) are perpendicular to an installation surface (10), the first surfaces (P1) face each other with a gap therebetween, and the second surfaces (P2) are horizontal to the installation surface (10). The third capacitor (UC3) is disposed so that the first surfaces (P1) face the second surfaces (P2) of the first and second capacitors (UC1, UC2) with a gap therebetween, and the third surfaces (P3) are flush with the third surfaces (P3) of the first and second capacitors (UC1, UC2).

IPC Classes  ?

• H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode

Abstract

A tandem rolling system according to the present invention makes it possible to reduce fluctuations in the plate thickness on the outlet side of the final stand. The tandem rolling system comprises a final target mass flow computation unit and an upstream mass flow control unit. The final target mass flow computation unit multiplies the actual value of the speed of a material to be rolled, measured on the outlet side of an Nth stand (N ≥ 3) that is the final stand, by a final-stand-outlet-side plate thickness target value defined in advance according to product specifications of the material to be rolled, and calculates a final target mass flow, which is the outlet-side mass flow of the final stand. The upstream mass flow control unit controls an actuator provided to an ith stand (1 ≤ i ≤ N - 2) or an actuator provided upstream relative to the ith stand, such that the outlet-side mass flow for the ith stand matches the final target mass flow.

IPC Classes  ?

• B21B 37/00 - Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
• B21B 37/18 - Automatic gauge control
• B21B 37/20 - Automatic gauge control in tandem mills
• B21B 37/46 - Roll speed or drive motor control

Abstract

This uninterruptible power supply system comprises: a selection unit (27) that selects, from among a plurality of uninterruptible power supply devices (U), the number of uninterruptible power supply devices required in order to supply power to a load (73). Each uninterruptible power supply device executes a driving operation in which power is supplied to the load in a case where a host device is selected, executes a standby operation in which power is not supplied in a case where the host device is not selected, and executes a diagnostic operation to diagnose whether a predetermined part (5, 8, 9) in the host device has failed during the standby operation. The selection unit changes the uninterruptible power supply devices to be selected so as to equalize the operating times of the plurality of uninterruptible power supply devices.

IPC Classes  ?

• H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over

Abstract

According to the present invention, at least one first electric power converter among a plurality of electric power converters (81 to 85) has a charging mode in which alternating current electric power supplied from an alternating current power source (71) via a switch (2) is converted into direct current electric power and stored in a corresponding electrical storage device (73), and a standby mode in which a control signal for electric power conversion is generated and standby for electric power conversion is performed. In a case in which alternating current voltage from the alternating current power source (71) is normal, a control device (10) turns the switch (2) on, and alternately switches at least one first electric power converter between the charging mode and the standby mode. In a case in which the alternating current voltage is not normal, the control device (10) turns the switch (2) off, and also controls each of the plurality of electric power converters (81-85) so as to convert direct current electric power of the electrical storage device (73) into alternating current electric power and to perform supply thereof to a load (72).

IPC Classes  ?

• H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over

Abstract

A SCADA web HMI client device according to the present invention comprises a processor and memory. The memory stores screen operation authority information, exception information, and image data of an HMI screen for monitoring an industrial plant, which have been received from a web server. The screen operation authority information stipulates, for each web browser, whether operation of the HMI screen is permitted. The exception information stipulates, for each web browser, whether operation of specific operation parts on the HMI screen is permitted. The processor executes a screen rendering process for rendering the HMI screen on the web browsers, wherein the operation permissions and denials thereof stipulated in the exception information are preferentially applied to said specific operation parts on the HMI screen, and the operation permissions and denials thereof stipulated in the screen operation authority information are applied to operation parts other than said specific operation parts on the HMI screen.

IPC Classes  ?

• G05B 23/02 - Electric testing or monitoring

Abstract

An uninterruptible power supply system (100) comprises a plurality of UPSs, a plurality of switches for connecting the plurality of UPSs in parallel with loads, and a connection circuit (40). The UPSs each include: a power converter (3) for generating an AC voltage having a predetermine frequency; and an output terminal (T3) for outputting the AC voltage generated by the power converter. The plurality of switches include a first switch (21b) connected between the output terminal of a first UPS (11) and the loads, a second switch (22b) connected between the output terminal of a second UPS (12) and the loads, and a third switch (23b) connected between the output terminal of a third UPS (13) and the loads. The connection circuit (40) is configured so that a reactor (41) is connected between the output terminal of the first UPS and the output terminal of the second UPS in a state in which the first and second switches are turned off and the third switch is turned on.

IPC Classes  ?

• H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over
• H02J 3/32 - Arrangements for balancing the load in a network by storage of energy using batteries with converting means
• H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode