The present invention relates to an electrical facility in which an electrical apparatus is housed in a container. The electrical apparatus housed in the container includes a transformer. The container has a first short side surface which is one end in a longitudinal direction, a second short side surface which is the other end in the longitudinal direction and which faces the first short side surface, a first long side surface orthogonal to the first short side surface and the second short side surface, and a second long side surface which is orthogonal to the first short side surface and the second short side surface and which faces the first long side surface. The first short side surface is provided with a door which can be opened and closed. The transformer is disposed along the first short side surface.
A power conditioner according to the present invention generates a d-axis second voltage and a q-axis second voltage, which are obtained by removing a specific frequency from a d-axis first voltage and a q-axis first voltage that are generated on the basis of a d-axis system voltage and a q-axis system voltage. The power conditioner then generates a d-axis third voltage and a q-axis third voltage by removing harmonic components from the d-axis system voltage and the q-axis system voltage, and generates a d-axis compensation voltage and a q-axis compensation voltage for compensating for the d-axis third voltage and the q-axis third voltage that attenuate when the impedance of the three-phase lines of the electric power system is imbalanced. Furthermore, the power conditioner generates a first three-phase voltage command by performing current control on a three-phase current command that is generated on the basis of a d-axis current command and a q-axis current command. Furthermore, the power conditioner controls a power converter on the basis of a second three-phase voltage command, which is obtained by adding a three-phase voltage generated on the basis of the d-axis third voltage and the q-axis third voltage, a three-phase compensation voltage generated on the basis of the d-axis compensation voltage and the q-axis compensation voltage, and the first three-phase voltage command.
H02M 7/48 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande
A controller calculates, on the basis of an AC-side output electric current or output voltage of an inverter, a dq-axis positive-phase electric current, a dq-axis negative-phase electric current, a positive-phase virtual impedance, and a negative-phase virtual impedance. The controller also calculates a three-phase first positive-phase voltage on the basis of the dq-axis positive-phase electric current and the positive-phase virtual impedance, and calculates a three-phase first negative-phase voltage on the basis of the dq-axis negative-phase electric current and the negative-phase virtual impedance. Furthermore, the controller calculates a three-phase second positive-phase voltage to be the three-phase first positive-phase voltage when the positive-phase electric current is equal to or greater than a first threshold value and to be zero when the positive-phase electric current is less than the first threshold value, and calculates a three-phase second negative-phase voltage to be the three-phase first negative-phase voltage when the negative-phase electric current is equal to or greater than a second threshold value and to be zero when the negative-phase electric current is less than the second threshold value. Furthermore, the controller controls the inverter on the basis of a voltage command value that is obtained by subtracting the three-phase second positive-phase voltage and the three-phase second negative-phase voltage from a three-phase voltage command that is generated on the basis of a predetermined parameter.
H02M 7/48 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande
An induction heating system according to the present invention comprises: a plurality of transverse-type induction heating devices installed along a transport direction of a rolled material; and a computer that, on the basis of information related to the rolled material and actual values of a width-direction temperature distribution on an inlet side and an outlet side of the induction heating devices, calculates a heating pattern, which is a combination of power supplied to the inductor of each induction heating device and the position of each inductor that can move in a width direction of the rolled material, and sets a heating pattern for each of the induction heating devices. The computer is configured so as to execute: defining an evaluation function including a term of the deviation between a target value and a predicted value for the width-direction temperature distribution of the rolled material on the outlet side of each of the induction heating devices, and a term of power supplied to each of the inductors; and calculating a heating pattern candidate that is a heating pattern for when the evaluation function is minimized.
B21B 45/00 - Dispositifs pour le traitement de surface des pièces spécialement combinés aux laminoirs, disposés dans les laminoirs, ou adaptés pour être utilisés avec les laminoirs
B21B 37/74 - Commande de la température, p. ex. en refroidissant ou en chauffant les cylindres ou le produit
B21B 38/00 - Procédés ou dispositifs de mesure spécialement adaptés aux laminoirs, p. ex. détection de la position, inspection du produit
5.
ROLLING EQUIPMENT MACHINE DETERIORATION DIAGNOSING DEVICE
A deterioration diagnosing device of a rolling equipment machine includes an input/output data obtaining unit, a model identifying unit, a monitoring parameter calculating unit, a monitoring parameter usage determining unit, a representative value calculating unit, a representative value storage unit, and a deterioration diagnosing unit. The monitoring parameter usage determining unit includes a categorized monitoring parameter acquiring function for acquiring the monitoring parameters, so as to be classified according to categories designated depending on a rolling condition. The representative value calculating unit calculates a representative value of monitoring parameters from a predetermined time period corresponding to each of the categories. The representative value storage unit accumulates, with respect to each of the categories, the representative values over a learning period designated from a start of a monitoring process. The deterioration diagnosing unit includes a categorized deterioration determining function that determines presence/absence of deterioration with respect to each of the categories.
The purpose of the present disclosure is to provide a thin-film manufacturing apparatus with which a reduction in tact time is achieved. A thin-film manufacturing device (501) according to the present disclosure is configured to include an ultrasonic atomization device (101), a heating mechanism (201), and a base material rotation mechanism (301). The base material rotation mechanism (301) executes a base material rotation process for rotating a cylindrical base material (15) that includes a film formation part (15m) by driving a rotary belt driving motor (30). The cylindrical base material (15) is set to one of first and second arrangement states by means of the base material rotation process. The ultrasonic atomization device (101) executes a mist supply process on a film formation region of the film formation part (15m) set to the first arrangement state. When the film formation region of the film formation part (15m) is set to the second arrangement state, the heating mechanism (201) executes a heating process for heating the film formation region in the second arrangement state after the mist supply process.
B05C 9/14 - Appareillages ou installations pour appliquer des liquides ou d'autres matériaux fluides aux surfaces par des moyens non prévus dans l'un des groupes , ou dans lesquels le moyen pour déposer le liquide ou autre matériau fluide n'est pas important pour appliquer un liquide ou autre matériau fluide et exécuter une opération auxiliaire l'opération auxiliaire nécessitant un chauffage
B05C 9/12 - Appareillages ou installations pour appliquer des liquides ou d'autres matériaux fluides aux surfaces par des moyens non prévus dans l'un des groupes , ou dans lesquels le moyen pour déposer le liquide ou autre matériau fluide n'est pas important pour appliquer un liquide ou autre matériau fluide et exécuter une opération auxiliaire l'opération auxiliaire étant exécutée après l'application
The present invention comprises: a multi-parallel chopper circuit having a plurality of unit chopper circuits; and a control device having a plurality of control units provided so as to correspond to each of the plurality of unit chopper circuits. The plurality of control units control the operation of the plurality of unit chopper circuits so that a normal mode current component flowing through the unit chopper circuits approaches a normal mode current reference and a common mode current component flowing through the unit chopper circuits approaches a common mode current reference. As a result, the current shares of each of the unit choppers can be equalized even when two serial choppers are used as unit choppers and a plurality of unit choppers are connected in multi-parallel.
H02M 3/155 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu sans transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs
This ventilation hood is provided in a housing for housing an electrical apparatus, comprises a plurality of metal plates, and is configured to be foldable. One metal plate of the plurality of metal plates is fixed and attached to the housing, and the plurality of metal plates have a nest structure. One or more metal plates other than the one metal plate are deployed from the one metal plate so as to connect the indoor and outdoor sides of the housing during ventilation in the housing.
A ventilation hood provided in a housing that houses an electric device, the ventilation hood comprising: a metal plate that closes a ventilation port of the housing; a drive device that moves the metal plate so as to connect the indoor side and the outdoor side of the housing during ventilation in the housing; and a cover that is provided so as to cover a gap between the metal plate and the housing, except for the lower portion of the gap, during ventilation in the housing.
The objective of the present disclosure is to provide a chassis dynamometer capable of restraining a vehicle without requiring human intervention during a vehicle driving test. A side roller (3L (31)), which is a left side roller, presses a restraining roller (33) from the right side against a tire (6L), which is a left tire, to restrain the movement of the tire (6L) in the rightward direction. A side roller (3R), which is a right side roller, presses a restraining roller (33) from the left side against a tire (6R), which is a right tire, to restrain the movement of the tire (6R) in the leftward direction. The restraining roller (33) of the side roller (3L) is in contact with a lower region (6a) on the inner side of the tire (6L) and rotates in conjunction with the rotation of the tire (6L). The restraining roller (33) of the side roller (3R) is in contact with a lower region (6a) on the inner side of the tire (6R) and rotates in conjunction with the rotation of the tire (6R).
This operation assistance system comprises: a control value setting unit; an operation amount acquisition unit; an actual result data acquisition unit; a deterioration evaluation unit; an operation amount correction unit; and a corrected operation amount presentation unit. The control value setting unit sets, for rolling equipment, a control value calculated on the basis of a rolling plan. The operation amount acquisition unit acquires an operation amount for maximizing the production efficiency of the rolling equipment for which the control value has been set. The actual result data acquisition unit acquires time-series actual result data of the rolling equipment. The deterioration evaluation unit evaluates the deterioration state of the rolling equipment on the basis of the time-series actual result data. The operation amount correction unit corrects the operation amount on the basis of the deterioration state of the rolling equipment. The corrected operation amount presentation unit presents the corrected operation amount.
A voltage control apparatus includes an inverter and a controller connected to the inverter. The controller executes processing for, when a voltage drop of an output voltage of the inverter is equal to or larger than a threshold because of fluctuation in an AC voltage of a power grid, calculating virtual impedance using variables including an active voltage command value and a reactive voltage command value and an active current command value and a reactive current command value, processing for calculating a virtual active voltage and a virtual reactive voltage by multiplying, by the virtual impedance, each of an active current and a reactive current, and processing for performing voltage control based on the virtual active voltage and the virtual reactive voltage such that each of the active current and the reactive current can approach each of the active current command value and the reactive current command value.
H02J 3/18 - Dispositions pour réglage, élimination ou compensation de puissance réactive dans les réseaux
H02J 3/24 - Dispositions pour empêcher ou réduire les oscillations de puissance dans les réseaux
H02M 7/44 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques
A temperature control device for controlling the temperature of a rolled material in a hot rolling line comprises a rolling data acquisition unit, a model description unit, and an identification unit. The rolling data acquisition unit acquires rolling data including a temperature actual value of the rolled material. The model description unit describes a temperature model for calculating the temperature of the rolled material, and describes, as a function of the temperature of the rolled material, a water-cooling heat transfer rate, which is a parameter of the temperature model, with a curve or a polygonal line passing through the minimum heat flux point and the critical heat flux point. The identification unit identifies the water-cooling heat transfer rate by repeatedly deforming the curve or the polygonal line so that the difference between the temperature calculation value calculated using the temperature model and the temperature actual value is reduced.
B21B 37/76 - Commande du refroidissement sur la table de sortie
B21B 45/02 - Dispositifs pour le traitement de surface des pièces spécialement combinés aux laminoirs, disposés dans les laminoirs, ou adaptés pour être utilisés avec les laminoirs pour lubrifier, refroidir ou nettoyer
The present invention provides a SCADA system in which the time given to alarm information can be equalized between two redundant SCADA servers. The SCADA system includes a first SCADA server and a second SCADA server configured to be able to receive alarm-related signals from a PLC. Each of the first SCADA server and the second SCADA server, upon receiving an alarm-related signal from the PLC, generates alarm data in which the current time has been given to the alarm-related signal, and transmits the generated local alarm data to the other SCADA server. In addition, each of the SCADA servers receives remote alarm data from the other SCADA server. Furthermore, each of the SCADA servers, upon acquiring at least one of the local alarm data or the remote alarm data, selects either the local alarm data or the remote alarm data according to a predetermined rule.
A power conversion device according to an aspect of the embodiment is a power conversion device in which a delay time occurs from a first timing of updating a detection result of a position of a motor using a position sensor by outputting the detection result of each position of the motor in each first period from the position sensor to a second timing of acquiring position information of the motor in each second period within a control cycle of the motor. The power conversion device includes a compensation amount adjustment unit and a control unit. The compensation amount adjustment unit counts time from the first timing to the second timing and generates a compensation value for compensating for the position information based on the counting result. The control unit performs position control on the motor based on the position information as a result of compensation and position command information of the motor.
H02P 23/14 - Estimation ou adaptation des paramètres des moteurs, p. ex. constante de temps du rotor, flux, vitesse, courant ou tension
G01B 7/30 - Dispositions pour la mesure caractérisées par l'utilisation de techniques électriques ou magnétiques pour mesurer des angles ou des cônesDispositions pour la mesure caractérisées par l'utilisation de techniques électriques ou magnétiques pour tester l'alignement des axes
A SCADA web HMI system includes a plurality of PLCs, a plurality of HMI client devices, and a SCADA serve device. The SCADA server device includes a communication driver and a client management unit connected to the plurality of HMI client devices. The client management unit transmits in-use screen information indicating a screen currently used by the HMI client devices to the communication driver. The communication driver acquires a screen-specific device list in which parts, and numbers and memory addresses of the PLCs storing the signal data corresponding to the parts are defined, for each of screens displayed on the HMI client devices, selects the signal data defined in the screen-specific device list corresponding to the currently-used screen indicated by the in-use screen information, adds a screen identifier to the selected signal data, and transmits the resultant signal data to the client management unit for each data type.
G05B 19/05 - Automates à logique programmables, p. ex. simulant les interconnexions logiques de signaux d'après des diagrammes en échelle ou des organigrammes
The objective of the present invention is to provide a chassis dynamometer that suppresses resonance and vibration phenomena, without changing the mechanical structure of the chassis dynamometer. An inverter (4) of a chassis dynamometer (1) according to the present disclosure includes: a notch filter (40) that attenuates a signal in an attenuation target frequency band including the mechanical natural frequency of the chassis dynamometer 1, from a rotation command signal (S3), and outputs a rotation command signal (S3A); a secondary HPF (45) that passes signals in a high-frequency band including the mechanical natural frequency, among an encode signal (S7), to obtain an encode signal (S7A); a subtractor (47B) that subtracts the encode signal (S7A) from the rotation command signal (S3A) to obtain a rotation command signal (S3B); and a roller drive control unit (RC) that generates a drive control signal (S4) on the basis of the rotation command signal (S3B).
A power conditioner (10) calculates a d-axis reverse-phase current command (Indref) on the basis of a reverse-phase voltage (Vns) on the AC side of an inverter (12). In addition, the power conditioner calculates a three-phase reverse-phase current command (Ins_ref) or a three-phase reverse-phase voltage command (Vns_ref) by performing reverse-phase current control for causing a reverse-phase current (Ino) on the AC side of the inverter to follow the d-axis reverse-phase current command. Furthermore, the power conditioner generates a voltage command value (Vref) for controlling the inverter on the basis of a three-phase positive phase current command (Ips_ref) generated on the basis of the three-phase reverse-phase current command and predetermined parameters (a phase command value θ ref, a d-axis voltage command value Vdref, a q-axis voltage command value Vqref, etc.), or on the basis of a three-phase positive phase voltage command (Vps_ref) generated on the basis of the three-phase reverse-phase voltage command and the predetermined parameters. Thus, the power conditioner controls the inverter on the basis of the voltage command value.
H02M 7/48 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande
This power conditioner is provided with an inverter that converts DC power supplied from a DC power source into AC power and supplies the AC power to a power grid, and a controller that controls the inverter. The controller calculates a differential impedance being a difference between a positive phase impedance obtained by dividing a d-axis positive phase voltage included in a positive phase voltage on the AC side of the inverter by a d-axis positive phase current included in a positive phase current, and a reverse phase impedance obtained by dividing a d-axis reverse phase voltage included in a reverse phase voltage on the AC side of the inverter by a d-axis reverse phase current included in a reverse phase current. Further, the controller stops the inverter if a solo operation condition is met where the absolute value of the differential impedance falls below a threshold value.
H02M 7/48 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande
20.
DRIVE POWER SUPPLY FOR MECHANICAL SWITCH, POWER SUPPLY DEVICE, AND METHOD FOR DIAGNOSING DEGRADATION
A mechanical switch includes a mechanical contact, and a coil that receives supply of a drive current from a drive power supply and opens or closes the mechanical contact. The drive power supply includes a capacitor, and a switch connected between the capacitor and the coil. The switch is temporarily turned on in order to turn on/off the mechanical switch, and supplies the drive current from the capacitor to the coil. The drive power supply further includes a charging circuit that charges the capacitor in an OFF period of the switch, a detection circuit that detects a charging current and a voltage of the capacitor, and a diagnosis circuit that diagnoses a degradation state of the capacitor from the detected charging current and voltage.
H01H 71/04 - Moyens pour indiquer l'état du dispositif de commutation
H01H 33/28 - Dispositions à énergie incorporée dans l'interrupteur pour actionner le mécanisme moteur
H01H 47/00 - Circuits autres que ceux appropriés à une application particulière du relais et prévue pour obtenir une caractéristique de fonctionnement donnée ou pour assurer un courant d'excitation donné
H02M 3/335 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu avec transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrodes de commande pour produire le courant alternatif intermédiaire utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs
This power conversion device comprises: a delta connection cascade-type three-phase MMC power converter; and a control device (3) for controlling the power converter. In the control device (3), a phase voltage balance control unit (30) calculates an arm current command value (Iuv*, Ivw*, Iwu*) of each arm and a circulating current command value (Iz*) so that the difference between a representative value of voltage of a power storage element included in each arm and a representative value of voltage of power storage elements included in all arms becomes small. A reverse phase current command value calculation unit (40) calculates reverse phase current command values (Idn*, Iqn*) on the basis of the arm current command values and the circulating current command value. The phase voltage balance control unit (30) is configured to limit the magnitude of the arm current command values and the circulating current command value.
A voltage control apparatus, when a voltage drop of an output voltage of an inverter is equal to or larger than a threshold, calculates first virtual impedance using various variables, calculates, such that an output current of the inverter does not exceed a rated value, second virtual impedance to be temporarily added to the first virtual impedance, calculates a virtual active voltage and a virtual reactive voltage by multiplying each of an active current and a reactive current calculated by the output current, by virtual impedance obtained by adding up the first virtual impedance and the second virtual impedance, and performs voltage control based on the virtual active voltage and the virtual reactive voltage such that each of the active current and the reactive current can approach each of an active current command value and a reactive current command value required of a power grid.
A power conversion apparatus and a method for cooling the power conversion apparatus according to an embodiment of the present invention comprise: a semiconductor module including a semiconductor switching element and a diode connected to the semiconductor switching element; a control device that outputs a control signal indicating the duty of the semiconductor switching element; and a heat sink that is connected to the semiconductor module, has a flow path allowing a refrigerant to flow therethrough, and absorbs heat generated by the semiconductor module. The control device changes, in accordance with the duty, the flow rate of the refrigerant flowing through the heat sink.
H01L 25/07 - Ensembles consistant en une pluralité de dispositifs à semi-conducteurs ou d'autres dispositifs à l'état solide les dispositifs étant tous d'un type prévu dans une seule des sous-classes , , , , ou , p. ex. ensembles de diodes redresseuses les dispositifs n'ayant pas de conteneurs séparés les dispositifs étant d'un type prévu dans la sous-classe
H01L 25/18 - Ensembles consistant en une pluralité de dispositifs à semi-conducteurs ou d'autres dispositifs à l'état solide les dispositifs étant de types prévus dans plusieurs différents groupes principaux de la même sous-classe , , , , ou
H01L 23/473 - Dispositions pour le refroidissement, le chauffage, la ventilation ou la compensation de la température impliquant le transfert de chaleur par des fluides en circulation par une circulation de liquides
An immersion motor (12) according to an embodiment comprises a stator (33) and a rotor (32). The stator and the rotor are each coated with a polyethylene-based heat-fusible material. An immersion pump (10) comprises the immersion motor having a motor shaft (31) to which the rotor is fixed, and the immersion pump comprises a pump shaft (21) connected to the motor shaft, and a pump body (22) formed integrally with the pump shaft. Accordingly, the immersion pump can operate with high efficiency in a state in which the stator and the rotor are directly immersed in anhydrous ammonia.
H02K 5/12 - Enveloppes ou enceintes caractérisées par leur configuration, leur forme ou leur construction spécialement adaptées à un fonctionnement dans un liquide ou dans un gaz
H02K 3/32 - Enroulements caractérisés par la configuration, la forme ou la réalisation de l'isolement
A method for manufacturing an immersion motor according to an embodiment is for manufacturing an immersion motor that is driven while being immersed in anhydrous ammonia, wherein a plurality of conductive wires constituting a stator coil are attached to a stator core, a first coating film of a polyethylene-based thermal fusion material is formed by a powder coating method on the entire stator core to which the plurality of conductive wires are attached, a rotor core is attached to a rotor, a second coating film of the polyethylene-based thermal fusion material is formed by the powder coating method on the entire rotor to which the rotor core is attached, and the rotor on which the second coating film is formed is attached to the stator core on which the first coating film is formed.
H02K 5/12 - Enveloppes ou enceintes caractérisées par leur configuration, leur forme ou leur construction spécialement adaptées à un fonctionnement dans un liquide ou dans un gaz
H02K 3/32 - Enroulements caractérisés par la configuration, la forme ou la réalisation de l'isolement
This power electronics system comprises: a housing that is installed outdoors; a power electronics device that is disposed inside the housing; and an exhaust duct that is attached to the housing and that is long in the vertical direction. The housing has a first intake port provided on one side surface, and a first exhaust port provided at a lower part of another side surface opposite the one side surface. The exhaust duct is attached to the other side surface so as to cover the first exhaust port, and has a second exhaust port provided to an upper part of at least one of the side surfaces that are opposite each other in the width direction, and a snow protection filter provided to the second exhaust port.
An inverter (10) includes a multilevel circuit having a plurality of switching elements (Q1 to Q4), converts first to third DC voltages supplied from a DC positive bus (L1), a DC neutral point bus (L2), and a DC negative bus (L3) into AC voltages, and supplies the AC voltages to a load. A control device superimposes, on a sinusoidal voltage command value, a third harmonic of the voltage command value to generate a reference AC voltage. The control device compares the reference AC voltage with a carrier signal having a peak-peak value corresponding to the DC voltage between the DC positive bus and the DC negative bus and generates a gate signal for turning on and off the plurality of switching elements (Q1-Q4). The control device detects the load factor of the power conversion device from the detection value of output current by a current detector (11). In a first case where the load factor is larger than a predetermined threshold value, the control device increases the amount of superimposition of the third harmonic wave with respect to the voltage command value as compared with a second case where the load factor is equal to or less than the threshold value.
H02M 7/48 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande
A control board (1) of an embodiment includes: a housing (2); a unit (10) that is provided on a base panel (3) in the housing; a caster (19) that is provided on a bottom portion (10d) of the unit and is capable of traveling on the base panel; an upper portion fixation panel (17) that fixes a backside upper end (10fu) of the unit at a time of storing the unit; a guide groove (32) that regulates a movement of the caster such that the unit is lowered to a fixation position toward a back side at the time of storing the unit; and a unit fixation portion (14) that fixes a backside lower end (10fd) of the unit when an entire lower surface region of the unit comes into contact with the base panel. Thereby, the control board is provided which is capable of improving a fixation performance of the unit to the housing, preventing a component inside the unit, and an electric conductor, a cable, or the like that is connected from being damaged, and improving ease and workability in taking the unit in and out of the housing.
A ground fault detection circuit (6) comprises first to fourth resistance elements (31-34). Terminals on one side of the first to third resistance elements (31-33) are respectively connected to first to third AC lines (RL, SL, TL), and terminals on the other side of the first to third resistance elements (31-33) are all connected to a terminal on one side of a fourth resistance element (34). A terminal on the other side of the fourth resistance element (34) receives a ground voltage. The ground fault detection circuit (6) comprises a determination circuit (100) which, on the basis of the inter-terminal voltage of the fourth resistance element (34), determines whether a ground fault has occurred in a power conversion device. The determination circuit (100) includes: a first comparator (36) for comparing the inter-terminal voltage of the fourth resistance element (34) with a first reference voltage (VR); and a first on-delay timer (37) for receiving the output of the first comparator (36).
H02H 3/34 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion sensibles à la différence de tensions ou de courantsCircuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion sensibles à un angle de déphasage entre tensions ou courants comprenant la comparaison des valeurs de tension ou de courant en des points correspondants des différents conducteurs d'un même système, p. ex. de courants dans des conducteurs d'aller et retour d'un système triphasé
G01R 31/50 - Test d’appareils, de lignes, de câbles ou de composants électriques pour y déceler la présence de courts-circuits, de continuité, de fuites de courant ou de connexions incorrectes de lignes
H02H 3/16 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion sensibles à un courant de défaut à la terre ou à la masse
H02H 3/247 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion sensibles à une baisse ou un manque de tension ayant des moyens de temporisation
Provided is a power conversion device comprising: a plurality of converters that are connected in parallel with an AC circuit, are connected in parallel with a DC circuit, and perform at least one of conversion from AC power to DC power and conversion from DC power to AC power; a control circuit that controls the operation of power conversion by the plurality of converters; and a plurality of converter current detectors that each detect the magnitude of AC current flowing through each of the plurality of converters. The control circuit calculates the entire converter current total equivalent value by multiplying one converter current detection value by the number of the plurality of converters and generates a control signal for controlling the operation of the plurality of converters on the basis of the entire converter current total equivalent value. This provides the power conversion device capable of appropriately controlling the operation of the plurality of converters connected in parallel with a simpler configuration.
H02H 7/10 - Circuits de protection de sécurité spécialement adaptés aux machines ou aux appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou de ligne, et effectuant une commutation automatique dans le cas d'un changement indésirable des conditions normales de travail pour convertisseursCircuits de protection de sécurité spécialement adaptés aux machines ou aux appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou de ligne, et effectuant une commutation automatique dans le cas d'un changement indésirable des conditions normales de travail pour redresseurs
H02M 7/12 - Transformation d'une puissance d'entrée en courant alternatif en une puissance de sortie en courant continu sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande
Provided is a power supply device comprising: a converter (12) that converts power supplied from a power supply (2) into DC power corresponding to a DC load; a current detector (16) that detects the magnitude of the current of the DC power supplied from the converter to the DC load (4); a voltage detector (18) that detects the magnitude of the voltage of the DC power supplied from the converter to the DC load; and a control device (16) that controls the operation of converting the power by the converter. The control device has: a current control mode for controlling the operation of the converter so as to output a current of constant magnitude corresponding to a current command value; and a voltage control mode for controlling the operation of the converter so as to output a voltage of constant magnitude corresponding to a voltage command value. When the current control mode is set, the control device causes a proportional integration controller (52), which controls a current calculation value so that the voltage of constant magnitude corresponding to the voltage command value is output, to set a final current command value as the initial value of the current calculation value. Thus, a power supply device in which a large fluctuation in output current can be suppressed even when switching from a current control mode to a voltage control mode is provided.
H02M 3/155 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu sans transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs
32.
LEARNING SYSTEM AND LEARNING METHOD FOR PREDICTION MODEL
The present disclosure relates to a learning system that sequentially learns a prediction model for a manufacturing device which has different product requirements. This learning system comprises: at least one processor; and a storage device that retains, as learning data, a parameter which uses a probability distribution to express a learning value calculated on the basis of data acquired during manufacturing and the timing at which the parameter was updated last. The at least one processor uses a prediction model corrected on the basis of the learning data to calculate a set value for controlling a manufacturing device, acquires a manufacturing performance value corresponding to a prediction value of the prediction model, computes a parameter expressing a performance value probability distribution on the basis of at least one acquired performance value, updates the learning data, and stores the learning data in a storage device.
In the present invention, a result collection unit collects actual values including an inlet-side temperature actual value and an outlet-side temperature actual value of a cooling device and an speed actual value of a rolled material, and collects the open/close state of a fill valve of each spray system. A predicted value calculation unit calculates an outlet-side temperature predicted value of the cooling device for each representative point by using the actual value of each representative point. An error change amount calculation unit calculates an error between the outlet-side temperature actual value and the outlet-side temperature predicted value of each representative point, selects two representative points from the plurality of representative points, and calculates the amount of change in the error between the two representative points. A unit-error change amount holding unit specifies, as a state-change spray system, a spray system in which the open/close state of the fill valve has changed between the two representative points, calculates a unit error change amount that is a change amount of each state-change spray system, and holds the unit error change amount for each open/close state of the fill valve of each state-change spray system. A failure diagnosis unit diagnoses a failure of the spray system on the basis of the unit error change amount held for each open/close state of the fill valve.
B21B 45/02 - Dispositifs pour le traitement de surface des pièces spécialement combinés aux laminoirs, disposés dans les laminoirs, ou adaptés pour être utilisés avec les laminoirs pour lubrifier, refroidir ou nettoyer
B21B 37/74 - Commande de la température, p. ex. en refroidissant ou en chauffant les cylindres ou le produit
B21B 37/76 - Commande du refroidissement sur la table de sortie
This uninterruptible power supply device comprises a converter (1), a bidirectional chopper (2), an inverter (3), a control device (5), and a reference voltage generation circuit (50). The converter (1) converts AC power supplied from a first AC power supply (6) into DC power and supplies the DC power to DC bus bars (Lp, Ln). The bidirectional chopper (2) is connected between a power storage device (B1) and the DC bus bars (Lp, Ln) and supplies DC power from the power storage device (B1) to the DC bus bars (Lp, Ln) during power failure of the first AC power supply (6). The inverter (3) converts the DC power received from the DC bus bars (Lp, Ln) into AC power and supplies the AC power to a load (8). The control device (5) controls any of the converter (1), the bidirectional chopper (2), and the inverter (3) according to a power supply mode of the uninterruptible power supply device so that the DC voltage of the DC bus bars (Lp, Ln) becomes a reference voltage. The reference voltage generation circuit (50) generates the reference voltage so as to satisfy the DC voltage required by each of the converter (1), the bidirectional chopper (2), and the inverter (3).
H02J 9/06 - Circuits pour alimentation de puissance de secours ou de réserve, p. ex. pour éclairage de secours dans lesquels le système de distribution est déconnecté de la source normale et connecté à une source de réserve avec commutation automatique
Provided is a power conversion apparatus comprising: a main circuit unit which performs conversion of power; and a control device which controls the conversion of power performed by the main circuit unit. The control device has a command value calculation unit which calculates a phase-voltage phase command value and a phase-voltage amplitude command value for an AC current to be outputted from the main circuit unit. When the occurrence of disturbance is detected in a power system, the command value calculation unit: calculates a command value for a frequency by adding a correction value for a frequency at the time of the occurrence of disturbance to a reference value for the frequency of the AC voltage outputted from the main circuit unit; and calculates the phase-voltage phase command value by multiplying the integration result of the command value for the frequency by 2π. When the occurrence of disturbance is detected in the power system, the command value calculation unit calculates the phase-voltage amplitude command value by adding a correction value for the magnitude of the AC voltage at the time of the occurrence of disturbance to a reference value for the magnitude of the AC voltage to be outputted from the main circuit unit. As a result, a power conversion apparatus and a control device therefor capable of improving continuity in coordinated operation with a power system even when disturbance occurs in a power system side are provided.
H02J 3/16 - Circuits pour réseaux principaux ou de distribution, à courant alternatif pour règler la tension dans des réseaux à courant alternatif par changement d'une caractéristique de la charge du réseau par réglage de puissance réactive
H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs
36.
SYNCHRONOUS MOTOR DRIVE DEVICE AND DRIVE CONTROL METHOD
A synchronous motor drive device according to an embodiment comprises a power conversion unit and a control unit. The power conversion unit supplies the power generated by control to a synchronous motor. The control unit selects either a first control or a second control on the basis of whether or not the control state of the synchronous motor satisfies a predetermined identification condition, said first control giving priority to linearity in a conversion request item of conversion processing and being applied to a first region, said second control giving priority to a request item other than the linearity in the conversion request item of the conversion processing and being applied to a second region, said first region and said second region being included within an application range of the conversion processing for generating a current reference for current control from a request torque reference related to control of the synchronous motor.
This power conversion device comprises: a converter (1) that converts AC power supplied from an AC power supply (6) into DC power and supplies the DC power to DC lines (L1, L3); capacitors (C1-C4) that are connected to the DC lines (L1, L3); an inverter (3) that converts the DC power received from the DC lines (L1, L3) into AC power and supplies the AC power to a load (8); and a control device (5) that controls the converter (1) so that the DC voltage (VD) of the DC lines (L1, L3) becomes a reference voltage. The control device (5) detects, on the basis of at least either the DC voltage (VD) of the DC lines (L1, L3) or the load current flowing through the load (8), a transient change in which the load (8) changes suddenly. The control device (5) temporarily increases the control responsiveness of the DC voltage (VD) by the converter (1) in response to the detection of the transient change of the load (8).
H02M 5/458 - Transformation d'une puissance d'entrée en courant alternatif en une puissance de sortie en courant alternatif, p. ex. pour changement de la tension, pour changement de la fréquence, pour changement du nombre de phases avec transformation intermédiaire en courant continu par convertisseurs statiques utilisant des tubes à décharge ou des dispositifs à semi-conducteurs pour transformer le courant continu intermédiaire en courant alternatif utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs
H02J 9/06 - Circuits pour alimentation de puissance de secours ou de réserve, p. ex. pour éclairage de secours dans lesquels le système de distribution est déconnecté de la source normale et connecté à une source de réserve avec commutation automatique
H02M 7/12 - Transformation d'une puissance d'entrée en courant alternatif en une puissance de sortie en courant continu sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande
38.
POWER CONVERSION DEVICE AND SWITCHING CHARACTERISTIC ADJUSTMENT METHOD
A power conversion device according to an embodiment comprises a pressure-contact type semiconductor switching element, a drive circuit, and a connection cable. The drive circuit supplies a control signal for the semiconductor switching element. The connection cable connects the drive circuit and a control signal terminal of the semiconductor switching element and supplies the control signal to the control signal terminal of the semiconductor switching element. In the connection cable, a substantially half-rotation twist about the extension direction of the connection cable is provided at a predetermined distance away from the control signal terminal of the semiconductor switching element in the extension direction of the connection cable.
H02M 7/48 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande
H02M 7/12 - Transformation d'une puissance d'entrée en courant alternatif en une puissance de sortie en courant continu sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande
39.
MATERIAL PROPERTIES PREDICTION DEVICE FOR ROLLED PRODUCTS
A material properties prediction device for rolled products includes: an approximate model creation unit that creates an approximate model offline that comprehensively predicts material properties of a group of rolled products to be manufactured on a rolling line; and a material properties prediction unit that online predicts material properties in individual three-dimensional mesh-shaped areas of a rolled product manufactured on the rolling line, by using the approximate model. The approximate model creation unit includes: a dataset creation unit that creates a dataset to be used to create approximate model, in which the dataset creation unit has a condition setting unit that sets rolling conditions for the group of rolled products, and a material calculation unit that calculates metallurgical phenomena and material properties under the rolling conditions; and a model parameter determination unit that determines parameters expressing the approximate model by using the dataset.
This uninterruptible power supply device includes: a semiconductor switch that is connected between a bypass AC power supply and a load, is turned on when the bypass AC power supply is normal, and is turned off when the bypass AC power supply has a power failure; and an inverter that converts DC power supplied from an AC power supply or a battery into AC power and supplies the AC power to the load when the bypass AC power supply has a power failure, and supplies an assist current to the load if a load current is larger than a threshold current when the bypass AC power supply is normal, the assist current being a difference between the load current and the threshold current. Therefore, even if the load current is increased by load variation, the current flowing through the semiconductor switch can be maintained at the threshold current or lower.
H02J 9/06 - Circuits pour alimentation de puissance de secours ou de réserve, p. ex. pour éclairage de secours dans lesquels le système de distribution est déconnecté de la source normale et connecté à une source de réserve avec commutation automatique
This capacitor and capacitor assembly according to an embodiment have a capacitor body and a plate-like terminal. The capacitor body has a planar board surface. The plate-like terminal can connect a mating component to a connection surface parallel to the board surface. The connection surface of the plate-like terminal on the positive electrode side and the connection surface of the plate-like terminal on the negative electrode side are arranged so as to be skewed from each other in the normal direction of the board surface.
H01G 2/08 - Dispositions de réfrigérationDispositions de chauffageDispositions de ventilation
H02M 3/28 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu avec transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrodes de commande pour produire le courant alternatif intermédiaire
42.
MULTILEVEL POWER CONVERSION SYSTEM, AND CIRCUITRY OF MULTILEVEL POWER CONVERSION SYSTEM
A system for preventing semiconductor elements of a power converter from breaking down due to an overvoltage by a lightning surge in a multilevel power conversion system is provided. The multilevel power conversion system includes a multilevel power converter, and a controller that includes an operation control unit that causes an operation mode of the multilevel power converter to transition to a standby mode in which power conversion is not performed between a DC input/output unit and an AC input/output unit based on a predetermined condition, and a gate signal generation unit that generates and outputs a gate signal that puts at least one of a third semiconductor switching element or a second semiconductor switching element into a conducting state or a switching state in the standby mode.
H02M 1/00 - Détails d'appareils pour transformation
H02M 1/088 - Circuits spécialement adaptés à la production d'une tension de commande pour les dispositifs à semi-conducteurs incorporés dans des convertisseurs statiques pour la commande simultanée de dispositifs à semi-conducteurs connectés en série ou en parallèle
H02M 7/5387 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs, p. ex. onduleurs à impulsions à un seul commutateur dans une configuration en pont
43.
APPARATUS AND TEMPERATURE ABNORMALITY DETECTION METHOD
In an apparatus according to an embodiment, a heat-generating element that generates heat by energization is accommodated in a housing of the apparatus, and a fan provided in the housing is used to forcibly air-cool the inside of the housing. The apparatus includes a first temperature sensor, a second temperature sensor, and a controller. The first temperature sensor is disposed on the windward side of the fan in the flow of air generated by the fan, and detects the temperature on the windward side of the fan. The second temperature sensor is disposed downstream of the fan in the flow of air generated by the fan, and detects the temperature downstream of the fan. The controller detects that the air volume has decreased by using the difference between the temperature on the windward side of the fan and the temperature on the leeward side of the fan.
H02M 7/48 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande
When the processor receives execution data, the processor causes an executable program to progress based on the execution data. When the processor receives update data, the processor writes the update data into a memory and causes updating of an update program to progress. When the update of the update program is completed and the programmable device is thereafter reset, the processor ends the executable program and launches the update program as the executable program.
H02J 13/00 - Circuits pour pourvoir à l'indication à distance des conditions d'un réseau, p. ex. un enregistrement instantané des conditions d'ouverture ou de fermeture de chaque sectionneur du réseauCircuits pour pourvoir à la commande à distance des moyens de commutation dans un réseau de distribution d'énergie, p. ex. mise en ou hors circuit de consommateurs de courant par l'utilisation de signaux d'impulsion codés transmis par le réseau
H02J 7/00 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries
H02J 9/06 - Circuits pour alimentation de puissance de secours ou de réserve, p. ex. pour éclairage de secours dans lesquels le système de distribution est déconnecté de la source normale et connecté à une source de réserve avec commutation automatique
This power conditioner comprises: an inverter that converts DC power supplied from a DC power source into AC power and supplies the AC power to a power grid; and a control device that controls the inverter. On the basis of a first differential voltage which is the difference between a reverse-phase voltage on the AC side of the inverter and a voltage obtained by removing the high-frequency component of the reverse-phase voltage, the control device generates a reverse-phase current command for causing reverse-phase AC current to flow from the inverter. The control device performs control so as to stop the inverter when a second differential voltage, which is the difference between the reverse-phase voltage and a reverse-phase voltage command obtained by multiplying characteristics of the impedance between the inverter and the power grid by the reverse-phase current command, satisfies a threshold value condition.
H02M 7/48 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande
H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs
46.
CONTOUR DETECTION DEVICE AND SHAPE MEASUREMENT DEVICE
A contour detection device disclosed herein comprises: a camera for imaging a material to be rolled; and a processing circuit for processing a video captured by the camera. The processing circuit is configured to execute: dividing the video into a plurality of frames; identifying a plurality of target frames, in which the tip of the material to be rolled is present, among the plurality of frames; detecting a coordinate group representing the position of the material to be rolled in each target frame; calculating a coordinate conversion matrix for converting the coordinate group of each of the target frames into a preset reference coordinate group; obtaining one composite image from the plurality of target frames converted using the coordinate conversion matrix; and detecting the contour of the material to be rolled from the luminance of the composite image.
B21B 38/04 - Procédés ou dispositifs de mesure spécialement adaptés aux laminoirs, p. ex. détection de la position, inspection du produit pour mesurer l'épaisseur, la largeur, le diamètre ou d'autres dimensions transversales du produit
A power conversion device and an electric facility according to an embodiment include semiconductor circuit units, capacitors, and a transformer. The semiconductor circuit units are provided on the input side and the output side. The capacitors are connected to the semiconductor circuits and form capacitor rows together with respective semiconductor circuits on the input side and the output side. The transformer is connected to the semiconductor circuit units of the capacitor rows on the input side and the output side. When viewed in a first direction, on one side of the transformer in a second direction orthogonal to the first direction, the capacitor rows on the input side and the output side are arranged side by side in a third direction orthogonal to the first direction and the second direction.
H02M 3/28 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu avec transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrodes de commande pour produire le courant alternatif intermédiaire
48.
VOLTAGE ABNORMALITY DETECTION DEVICE AND POWER SUPPLY DEVICE
An adder according to the present invention sets a voltage upper limit value (VU) by adding a first voltage to a sinusoidal reference voltage (VREF) for which the frequency and phase thereof match those of an AC voltage (VI). If an instantaneous value of the AC voltage (VI) exceeds the voltage upper limit value (VU), a first integrator integrates over time a first deviation (VI-VU) of the instantaneous value of the AC voltage with respect to the voltage upper limit value. A voltage rise detection circuit detects a voltage rise of the AC voltage (VI) if a first integral value obtained by the first integrator exceeds a first threshold value. A subtractor sets a voltage lower limit value (VL) by subtracting a second voltage from the reference voltage (VREF). If the instantaneous value of the AC voltage (VI) is lower than the voltage lower limit value (VL), a second integrator integrates over time a second deviation (VI-VL) of the instantaneous value of the AC voltage with respect to the voltage lower limit value. A voltage drop detection circuit detects a voltage drop of the AC voltage (VI) if a second integral value obtained by the second integrator exceeds a second threshold value.
G01R 19/165 - Indication de ce qu'un courant ou une tension est, soit supérieur ou inférieur à une valeur prédéterminée, soit à l'intérieur ou à l'extérieur d'une plage de valeurs prédéterminée
A contamination state detection circuit (10) for detecting the contamination state of a first board of a power supply unit includes a first voltage divider circuit (22) for outputting a first divided voltage (V1) to a first node (N11). The first voltage divider circuit (22) includes a first resistance circuit (24) connected between a first power supply terminal (18) and the first node (N11), and a first resistance element (R1) connected between the first node (N11) and a second power supply terminal (20). The first resistance circuit (24) includes a plurality of second wiring patterns (WP1 to WP4) formed on a second board (11), and a plurality of second resistance elements (RA1 to RA4) having mutually different resistance values. The plurality of second wiring patterns (WP1 to WP4) have mutually different wiring widths equal to or less than the wiring width of a first wiring pattern formed on the first board. The plurality of second resistance elements (RA1 to RA4) are respectively connected in series with the plurality of second wiring patterns (WP1 to WP4) between the first power supply terminal (18) and the first node (N11). The contamination state detection circuit (10) detects the contamination state of the first wiring pattern on the basis of the first divided voltage (V1).
H02H 3/00 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion
H02J 9/06 - Circuits pour alimentation de puissance de secours ou de réserve, p. ex. pour éclairage de secours dans lesquels le système de distribution est déconnecté de la source normale et connecté à une source de réserve avec commutation automatique
This table roll control device of a hot rolling line controls the rotation speed of individual table rolls so that a rolled material is transported at a target speed. A table roll control device comprises: a collection unit that collects imaging data from a camera for capturing an image of a roughing mill and a table roll together with a rolled material, and registers the collected imaging data in a database; a transport speed detection unit that detects the transport speed of the rolled material from the imaging data collected by the collection unit; and a feedback control unit that performs feedback control of the rotation speed of the table roll so that the transport speed detected by the transport speed detection unit matches a target speed.
B21B 39/00 - Systèmes pour faire avancer, soutenir ou présenter le matériau, ou pour commander son mouvement, combinés avec des laminoirs, disposés dans des laminoirs, ou spécialement conçus pour être utilisés avec des laminoirs
B21B 38/00 - Procédés ou dispositifs de mesure spécialement adaptés aux laminoirs, p. ex. détection de la position, inspection du produit
B21B 39/02 - Avance du matériau ou soutien de celui-ciSystèmes de freinage ou de tension
Provided is a power conversion device comprising: a converter that is connected to a solar panel and also connected to an alternating current power system and that converts direct current power supplied from the solar panel to alternating current power corresponding to the power system and supplies the converted alternating current power to the power system side; and a control circuit for controlling the operation of power conversion by the converter. The control circuit has a cold-weather operation mode for: engaging a direct current switch when a direct current voltage of the solar panel reaches or exceeds a predetermined voltage that is lower than a lower limit value of a stipulated range; when the direct current voltage of the solar panel reaches or exceeds the lower limit value of the stipulated range, engaging an alternating current switch and controlling operation of the converter so that a direct current voltage of a charge accumulation element will be constant at a maximum value of an alternating current voltage of the power system; and starting up the converter when the direct current power of the solar panel reaches or exceeds a predetermined power. Provided thereby is a power conversion device making it possible to more appropriately start up operation of power conversion even when the outside air temperature is low.
H02H 7/122 - Circuits de protection de sécurité spécialement adaptés aux machines ou aux appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou de ligne, et effectuant une commutation automatique dans le cas d'un changement indésirable des conditions normales de travail pour convertisseursCircuits de protection de sécurité spécialement adaptés aux machines ou aux appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou de ligne, et effectuant une commutation automatique dans le cas d'un changement indésirable des conditions normales de travail pour redresseurs pour convertisseurs ou redresseurs statiques pour onduleurs, c.-à-d. convertisseurs de courant continu en courant alternatif
H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs
53.
POWER CONVERSION DEVICE AND BRACE FOR POWER CONVERSION DEVICE
This power conversion device comprises: an enclosure; a plurality of power converters arranged vertically; first and second support posts, each of which stands vertically inside the enclosure and supports the plurality of power converters; and a brace extending in a designated direction and connected to the first support post and the second support post. The first support post has a raised part to which the brace is connected. The brace includes: an insulating rodlike member having an end part and extending in the designated direction; and a securing member, connected to the end part, for securing the brace to the raised part. The securing member has: a base part extending in the designated direction and connected to the end part; and a connecting part branching off from the base part in two limbs so as to envelop the raised part from two sides, and connected to the raised part by means of a pin.
H02M 1/00 - Détails d'appareils pour transformation
H02M 7/48 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande
54.
OZONE GENERATION DEVICE AND METHOD FOR ATTACHING OBJECT-TRANSFER INTERNAL MEMBER
The purpose of the present disclosure is to provide an ozone generation device that can, in a structure having an object-transfer internal member, reduce environmental load and extend service life without decreasing the efficiency of use. In the present disclosure, an outer frame member (31) has an opening (31b), and an object-transfer internal member (32) is provided in the opening (31b). The object-transfer internal member (32) has a diameter variation property in which the member diameter (d2) becomes less than the opening diameter (d1) of the opening (31) at a cooling temperature (T1) or lower, and the member diameter (d2) becomes equal to or greater than the opening diameter (d1) in a non-cooling temperature range (TH). At a boundary surface (33) between the outer circumferential surface of the object-transfer internal member (32) and the inner circumferential surface of the opening (31b), the object-transfer internal member (32) and the opening (31b) are tightly attached to each other without having another member interposed therebetween.
C01B 13/11 - Préparation de l'ozone par décharge électrique
B23P 11/02 - Assemblage ou désassemblage de pièces ou d'objets métalliques par des processus du travail du métal non prévus ailleurs en dilatant une pièce et en l'emmanchant ensuite sur une autre pièce par retrait, ou en rétractant une pièce et en l'emmanchant ensuite par dilatation, p. ex. en employant la pression de fluidesAssemblage ou désassemblage de pièces ou d'objets métalliques par des processus du travail du métal non prévus ailleurs par assemblage à force
The purpose of the present invention is to provide a base surface treatment device for improving utilization efficiency of treatment liquid mist with respect to a surface of a base. An exhaust mechanism (31) in this substrate surface treatment device (101) of the present disclosure is disposed below a transport stage (2) that moves along a transport path (R2), and has an exhaust port (A31) in a region that overlaps the transport path (R2) in plan view. The exhaust mechanism (31) takes in a treatment liquid mist gas (22) from the exhaust port (A31) and executes exhaust treatment for exhausting air to outside of a surface treatment chamber (51). By this exhaust treatment, a mist gas circulation path (22a) including a region in the vicinity of the base surface along the surface of a base (1) is formed.
H01L 21/205 - Dépôt de matériaux semi-conducteurs sur un substrat, p. ex. croissance épitaxiale en utilisant la réduction ou la décomposition d'un composé gazeux donnant un condensat solide, c.-à-d. un dépôt chimique
H01L 21/31 - Traitement des corps semi-conducteurs en utilisant des procédés ou des appareils non couverts par les groupes pour former des couches isolantes en surface, p. ex. pour masquer ou en utilisant des techniques photolithographiquesPost-traitement de ces couchesEmploi de matériaux spécifiés pour ces couches
H01L 21/306 - Traitement chimique ou électrique, p. ex. gravure électrolytique
This maintenance support system includes a data storage device, an abnormality degree determination unit, a restoration time calculation unit, a maintenance evaluation unit, and a maintenance display unit. The data storage device stores, as records data acquired from measuring instruments installed in a steel plant, an abnormality occurrence time point, an abnormality occurrence location, a degree of abnormality, a maintenance method, a restoration time point at which an abnormal condition is restored to a normal condition due to execution of maintenance, a maintenance execution location, and a skill level of a person in charge who has executed the maintenance. The abnormality degree determination unit determines a degree of abnormality when an abnormality occurs in rolling equipment. The restoration time calculation unit calculates, for each of a plurality of past abnormalities having the same degree of abnormality as the degree of abnormality determined by the abnormality degree determination unit, a restoration time from the abnormality occurrence time point to the restoration time point due to execution of the maintenance. The maintenance evaluation unit uses a distance from the abnormality occurrence location to the maintenance execution location and the skill level to evaluate a predetermined number of maintenance methods with short restoration times calculated by the restoration time calculation unit. The maintenance display unit displays the maintenance method most highly evaluated by the maintenance evaluation unit on a display device.
B21C 51/00 - Dispositifs de mesure, de calibrage, d'indication, de comptage ou de marquage, spécialement conçus pour être utilisés dans la production ou la manipulation des matériaux concernés par les sous-classes
G05B 19/418 - Commande totale d'usine, c.-à-d. commande centralisée de plusieurs machines, p. ex. commande numérique directe ou distribuée [DNC], systèmes d'ateliers flexibles [FMS], systèmes de fabrication intégrés [IMS], productique [CIM]
57.
DISCONNECTION DETECTION DEVICE AND DISCONNECTION DETECTION METHOD
Provided is a disconnection detection device (10) comprising: a measurement circuit (12) that is connected to at least one cable of a pair of cables (6a, 6b) between a solar panel (3) and a power conversion device (4) and that inputs a measurement signal into the at least one cable when the power conversion device (4) is stopped, thereby measuring measurement data relating to disconnection of the pair of cables (6a, 6b) at each optional timing; a storage unit (14) that stores a determination value based on measurement data measured by the measurement circuit (12); and a detection unit (16) that compares the determination value with the measurement data measured by the measurement circuit (12) after the storage unit (14) has stored the determination value and that detects, if the measurement data has changed by a prescribed amount or greater with respect to the determination value, a disconnection of the pair of cables (6a, 6b) and outputs an alarm signal. As a result, a disconnection detection device and a disconnection detection method that can be used to more easily set a determination value can be provided.
An uninterruptible power source device (10) is connected to an AC system (1) and a DC grid (6). The DC grid (6) includes a DC bus (7) connected to the AC system (1) through an AC/DC converter (5), a distributed power source (61) that outputs the generated DC power to the DC bus, and a DC load (65) that receives the DC power of the DC bus (7). The uninterruptible power source device (10) comprises: a DC link (12) for transmitting/receiving DC power; a converter (11) that converts AC power supplied from the AC system (1) into DC power and supplies the DC power to the DC link (12); an inverter (14) that converts DC power received from the DC link (12) into AC power and supplies the AC power to an AC load (8); and a DC/DC converter (16) that has a first DC terminal (T1) connected to the DC link (12), a second DC terminal (T2) connected to a power storage device (9), and a third DC terminal (T3) connected to the DC bus (7), and is configured to redistribute DC power between the first to third DC terminals.
H02M 7/48 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande
A storage battery system (10) comprises: a plurality of storage battery boards (13-1 to 13-N); and a control device (12) that controls the plurality of storage battery boards (13-1 to 13-N). The storage battery board (13-i) is provided with a switch (SW) for controlling the connection between the storage battery board (13-i) and an uninterruptible power supply device (1). The control device (12) controls the switches (SW) of the plurality of storage battery boards (13-1 to 13-N) on the basis of the size of a load (6) connected to the uninterruptible power supply device (1) during a power failure in which the power supply from an AC input power supply (2) to the uninterruptible power supply device (1) is cut off.
H02J 9/06 - Circuits pour alimentation de puissance de secours ou de réserve, p. ex. pour éclairage de secours dans lesquels le système de distribution est déconnecté de la source normale et connecté à une source de réserve avec commutation automatique
An AC input filter (2) includes a first reactor (12RA) having a first terminal connected to a second terminal of a switch (1) and a second reactor (12RB) having a first terminal connected to the second terminal of the switch (1). A converter (3) includes a first multilevel circuit (3A) connected between a second terminal of the first reactor (12RA) and first to third DC lines (L1 to L3) and a second multilevel circuit (3B) connected between a second terminal of the second reactor (12RB) and the first to third DC lines (L1 to L3). A control device calculates a first voltage, which is the sum of the voltages across the terminals of first and second capacitors (C1, C2), and a second voltage, which is the difference between the voltages across the terminals of the first and second capacitors (C1, C2). When an AC power supply is healthy, the control device controls the first and second multilevel circuits (3A, 3B) so that the first voltage goes to a reference voltage and the second voltage is eliminated. In the event of a power failure in the AC power supply, the control device controls the first and second multilevel circuits (3A, 3B) so that the second voltage is eliminated.
H02M 7/12 - Transformation d'une puissance d'entrée en courant alternatif en une puissance de sortie en courant continu sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande
H02M 7/48 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande
This power conditioner performs coordinate conversion of a voltage detection value indicating the detection value of the output voltage of an inverter into a d-axis voltage detection value and a q-axis voltage detection value. The power conditioner performs coordinate conversion of a current detection value indicating the detection value of the output current of the inverter into a d-axis current detection value and a q-axis current detection value. Furthermore, the power conditioner calculates, on the basis of a d-axis difference voltage that is the difference between the d-axis voltage detection value and a d-axis voltage command value, a first current command value so that the d-axis voltage detection value approaches the d-axis voltage command value. Furthermore, the power conditioner calculates, on the basis of a q-axis difference voltage that is the difference between the q-axis voltage detection value and a q-axis voltage command value, a second current command value so that the q-axis voltage detection value approaches the q-axis voltage command value. Furthermore, the power conditioner controls the voltage of the inverter so that the d-axis current detection value approaches the second current command value and the q-axis current detection value approaches the first current command value.
H02M 7/48 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande
First and second bases are arranged to face each other. An inverter is mounted on either of the first and second bases. A converter is mounted on the first base. A chopper is mounted on the second base. At least some of fins thermally connected to the converter via the first base are thermally connected to the chopper via the second base.
H02J 9/06 - Circuits pour alimentation de puissance de secours ou de réserve, p. ex. pour éclairage de secours dans lesquels le système de distribution est déconnecté de la source normale et connecté à une source de réserve avec commutation automatique
H02M 1/00 - Détails d'appareils pour transformation
H02M 1/10 - Dispositions comprenant des moyens de conversion, pour permettre l'alimentation à volonté d'une charge par des sources de puissance de nature différente, p. ex. à courant alternatif ou à courant continu
H02M 1/32 - Moyens pour protéger les convertisseurs autrement que par mise hors circuit automatique
H02M 3/00 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu
H02M 7/00 - Transformation d'une puissance d'entrée en courant alternatif en une puissance de sortie en courant continuTransformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif
63.
OZONE GENERATION DEVICE AND OZONE GENERATION METHOD
The purpose of the present disclosure is to provide a structure of an ozone generation device that is capable of generating a relatively high concentration of ozone gas while suppressing a refrigerant amount of a refrigerant to a minimally needed amount. In an ozone generation device according to the present disclosure, raw material gas (G1) is supplied from the entire periphery of an electric discharge space (6) toward the center, and ozone gas (G2) obtained in the electric discharge space (6) is output from an electric discharge central space (S1) to the outside via a gas outflow port (12). A refrigerant flow path (4) provided in a low-voltage electrode (1) has a center-priority refrigerant flow path structure in which a refrigerant (C1) is made to flow in an electrode center region (D1) prior to in an electrode peripheral region (D2), by causing the refrigerant (C1) to flow from a refrigerant inlet (4a) toward a refrigerant outlet (4b).
Provided is a grid-connected power conversion system that comprises a plurality of power conversion devices that convert power supplied from a plurality of distributed power sources to alternating-current power that is compatible with a power grid. When stopping the operation of a principal circuit unit of the power conversion devices, a controller of the power conversion devices performs an operation that switches a plurality of switching elements of the principal circuit unit for a prescribed period of time and then stops the operation of the principal circuit unit to suppress output of current from the principal circuit unit and inflow of current to the principal circuit unit from the power grid. The present invention thereby provides a grid-connected power conversion system that can suppress the occurrence of circulating current between a plurality of power conversion devices by means of a simpler configuration.
H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs
H02M 7/48 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande
This power conditioner includes an inverter that converts DC power into AC power and supplies the AC power to a power system, and a control device that controls the inverter. The control device estimates the system voltage on the basis of the output current of the inverter and the characteristics of the impedance between the inverter and the power system. Moreover, the control device generates a correction voltage on the basis of a voltage obtained by removing the high-frequency component from a differential voltage which is the difference between the estimated system voltage and a target voltage. Furthermore, the control device issues an instruction to the inverter on the basis of the voltage obtained by adding the correction voltage to the target voltage.
H02M 7/48 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande
A SCADA system according to one embodiment of the present disclosure comprises: a plurality of clients that can be connected to each of a plurality of SCADA servers; and an engineering tool that generates a static priority list specifying the static priority of connection with each SCADA server for at least one of the plurality of clients. Each client is connected to a SCADA server to which all of a plurality of programmable logic controllers are connected. For the clients whose static priority is specified in the static priority list, the SCADA server of the connection destination is determined in accordance with the static priority specified in the list. For the clients whose static priority is not specified in the static priority list, the SCADA server of the connection destination is determined such that loads are equalized among the SCADA servers to which all the programmable logic controllers are connected.
This abnormality determination device (500) is for a power conversion device (600) having an inverter (16) and an LC filter (22) disposed downstream of the inverter (16) and comprises: a simulation calculation circuit (300) that simulates ideal characteristics of a reactor (L2) and a capacitor (C2) of the LC filter (22); and an abnormality detection circuit (400) that detects an abnormality in the power conversion device (600) on the basis of the calculation result of the simulation calculation circuit (300), the magnitude of the current output from the inverter (16), and the magnitude of the voltage across the capacitor (C2).
H02M 7/48 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande
H02M 1/00 - Détails d'appareils pour transformation
68.
POWER CONVERSION DEVICE CONTROL DEVICE AND POWER CONVERSION DEVICE
A power conversion device control device comprising: an effective power calculation section that acquires an electric current value and a voltage value measured on an AC side of a power conversion device, and calculates an effective power value, which is a measurement value for the effective power output by the power conversion device, on the basis of the acquired electric current value and voltage value; an integration unit that acquires the effective power value from the effective power value calculation section and, only when the acquired effective power value is in a charging direction, integrates the effective power value to calculate a charging power; a gain unit that calculates a first control value obtained by multiplying the charging power integrated by the integration unit and a prescribed gain; a DC voltage determination section that acquires the first control value calculated by the gain unit, calculates a DC voltage value from the charging power on the basis of the acquired first control value, and determines whether the calculated DC voltage value is at or above a prescribed threshold value; and an addition unit that, when it is determined by the DC voltage determination section that the DC voltage value is at or above the prescribed threshold value, adds together a prescribed effective power command value and the first control value and implements P droop control.
H02M 7/48 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande
69.
CONTROL CIRCUIT FOR ROTARY RECTIFIER AND BRUSHLESS SELF-STARTING SYNCHRONOUS MOTOR
A control circuit for a rotary rectifier according to an embodiment of the present invention detects the instantaneous voltage of a field coil, computes the frequency from the instantaneous voltage, and causes a current to be supplied from the rotary rectifier to the field coil within a prescribed phase range that includes a zero-crossing point where the instantaneous voltage changes from positive to negative. Thus, the control circuit is highly versatile with a simple configuration, and can carry out phase-optimized excitation control in a reliable manner.
A power conversion device includes an inverter, a control circuit and a series body. The control circuit includes a modulation factor computing unit that computes a modulation factor of the inverter based on the DC voltage and an output voltage command value, a gate signal generator that generates a gate signal necessary for on/off drive of the switching elements for generation of a pulse train based on comparison between the computed modulation factor and a carrier signal, and a gate signal allocator circuit that adjusts allocation of a gate signal such that a voltage of the positive electrode side capacitor and a voltage of the negative electrode side capacitor are balanced.
H02M 7/483 - Convertisseurs munis de sorties pouvant chacune avoir plus de deux niveaux de tension
H02M 7/5395 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs, p. ex. onduleurs à impulsions à un seul commutateur avec commande automatique de la forme d'onde ou de la fréquence de sortie par modulation de largeur d'impulsions
An uninterruptible power supply apparatus includes an AC/DC converter that converts AC power supplied from a commercial AC power supply into DC power and supplies the DC power to a DC line, a DC/AC converter that converts the DC power received from the DC line into AC power and supplies the AC power to a load, a DC/DC converter that provides and receives DC power between the DC line and a battery, and a bidirectional converter that, in high-speed charging of the battery, operates in cooperation with the AC/DC converter, converts the AC power supplied from the commercial AC power supply into DC power, and supplies the DC power to the DC line. This can prevent a shortage of DC power during a high-speed charging operation and enables high-speed charging of the battery while supplying rated power to the load.
H02J 9/06 - Circuits pour alimentation de puissance de secours ou de réserve, p. ex. pour éclairage de secours dans lesquels le système de distribution est déconnecté de la source normale et connecté à une source de réserve avec commutation automatique
H02J 7/00 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries
H02J 7/02 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries pour la charge des batteries par réseaux à courant alternatif au moyen de convertisseurs
H02M 1/00 - Détails d'appareils pour transformation
H02M 1/12 - Dispositions de réduction des harmoniques d'une entrée ou d'une sortie en courant alternatif
H02M 1/14 - Dispositions de réduction des ondulations d'une entrée ou d'une sortie en courant continu
H02M 1/44 - Circuits ou dispositions pour corriger les interférences électromagnétiques dans les convertisseurs ou les onduleurs
H02M 7/219 - Transformation d'une puissance d'entrée en courant alternatif en une puissance de sortie en courant continu sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs dans une configuration en pont
H02M 7/521 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type thyratron ou thyristor exigeant des moyens d'extinction utilisant uniquement des dispositifs à semi-conducteurs dans une configuration en pont
A web-based HMI subsystem according to one embodiment of the present disclosure checks whether or not program update numbers match between a SCADA web program that is running on a web browser of a client and a SCADA web program that is installed on a SCADA server. If a discrepancy between the program update numbers is detected, a client installer is downloaded from the SCADA server, and the web browser is terminated. The downloaded client installer is executed, and an updated client program and the updated SCADA web program are installed on the client. In conjunction with the execution of the client installer, the web browser is restarted.
The inside and the outside of an inverter unit of a power conversion device according to the present embodiment are partitioned by a partition plate. The partition plate is provided with a round hole, and a cylindrical capacitor case is threaded through the round hole. A gap between the edge of the round hole in the partition plate and the capacitor case threaded through the round hole is filled by a gasket. The gasket is formed from a base and a membrane. The base and the membrane are of a single piece. The base has a circular shape and the edges thereof are pinched from the front and back when mounted in the round hole. The membrane extends from the base mounted in the round hole toward the center of the round hole and adheres to the circumferential surface of the capacitor case threaded through the round hole.
H02M 7/48 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande
A plurality of power conversion devices convert direct current power to load based on direct current power stored in a plurality of power storage devices. The plurality of power conversion devices convert power of the load into direct current power corresponding to the plurality of power storage devices. The plurality of power conversion devices charge the plurality of power storage devices based on the power of the load side. The control device includes a conversion device determination part determining the power conversion devices among the plurality of power conversion devices to which an operation command is to be transmitted. The conversion device determination part is configured to determine, based on the information related to the states of the plurality of power storage devices and the plurality of power conversion devices, a number of the power conversion devices to which the operation command is to be transmitted.
In the present invention, during rolling, a first actual results collection unit collects first exit-side sheet thickness measured values at a first management point of a rolling material, and rolling load measured values for each stand. During the rolling of the rolling material, a second actual results collection unit collects second exit-side temperature measured values at a second management point, which is farther toward the tail end side than the first management point. After the rolling of the rolling material, a first training unit trains a deformation resistance model, a rolling load model, and a mill elongation model on the basis of the first exit-side sheet thickness measured values and the rolling load measured values. After the rolling of the rolling material, a second training unit trains a temperature model on the basis of the second exit-side temperature measured values. Before rolling of the next material, a setting calculation unit calculates a roll gap setting value, a roll peripheral speed setting value, and a cooling water amount setting value, using the deformation resistance model, the rolling load model, and the mill elongation model that were trained by the first training unit, and the temperature model that was trained by the second training unit.
B21B 37/72 - Commande de la partie terminale arrièreCommande de la partie terminale avant
B21B 37/00 - Dispositifs ou procédés de commande spécialement adaptés aux laminoirs ou aux produits laminés
B21B 37/26 - Variation automatique de l'épaisseur selon un programme prédéterminé pour obtenir une bande ayant une succession de longueurs avec des épaisseurs constantes différentes
B21B 37/74 - Commande de la température, p. ex. en refroidissant ou en chauffant les cylindres ou le produit
A first controller includes a first processor and a first memory. A second controller includes a second processor and a second memory. In transmitting data from the first controller to the second controller, the first controller repeatedly performs a write operation of writing transmitted data into the first memory in accordance with a clock signal, and reads the transmitted data from the first memory and outputs the transmitted data. The second controller writes the received data into the second memory in accordance with the clock signal, and reads the received data from the second memory in accordance with the clock signal. When a plurality of data values of the received data read from the second memory match each other in a plurality of consecutive clock cycles including a current clock cycle, the second controller transmits the data value of the current clock cycle to the second processor.
H02J 9/06 - Circuits pour alimentation de puissance de secours ou de réserve, p. ex. pour éclairage de secours dans lesquels le système de distribution est déconnecté de la source normale et connecté à une source de réserve avec commutation automatique
G06F 1/26 - Alimentation en énergie électrique, p. ex. régulation à cet effet
H02M 1/00 - Détails d'appareils pour transformation
H02M 5/42 - Transformation d'une puissance d'entrée en courant alternatif en une puissance de sortie en courant alternatif, p. ex. pour changement de la tension, pour changement de la fréquence, pour changement du nombre de phases avec transformation intermédiaire en courant continu par convertisseurs statiques
A charging/discharging management system includes a plurality of output parts used to connect with EVs, and a charger connected to a power supply. The charger is configured to charge the EVs connected to the plurality of output parts based on power supplied from the power supply. The charger includes a power supply part configured to convert the power supplied from the power supply into direct current power corresponding to the EVs, a switching part connected with the power supply part and connected with each of the plurality of output parts, and a controller connected with the power supply part and the switching part. The switching part is configured to switch paths between the power supply part and the plurality of output parts. The switching part is configured to supply direct current power output from the power supply part to one of the plurality of output parts.
B60L 53/67 - Commande de plusieurs stations de charge
B60L 53/10 - Procédés de chargement de batteries spécialement adaptées aux véhicules électriquesStations de charge ou équipements de charge embarqués pour ces batteriesÉchange d'éléments d’emmagasinage d'énergie dans les véhicules électriques caractérisés par le transfert d’énergie entre la station de charge et le véhicule
B60L 53/62 - Surveillance et commande des stations de charge en réponse à des paramètres de charge, p. ex. courant, tension ou charge électrique
B60L 58/14 - Procédés ou agencements de circuits pour surveiller ou commander des batteries ou des piles à combustible, spécialement adaptés pour des véhicules électriques pour la surveillance et la commande des batteries en fonction de l'état de charge [SoC] empêchant les décharges excessives
H02J 7/06 - Régulation du courant ou de la tension de charge utilisant des tubes à décharge ou des dispositifs à semi-conducteurs
78.
DESIGN ASSISTANCE DEVICE AND DESIGN ASSISTANCE METHOD
A design assistance method includes: acquiring design candidate data including design parameters as electric motor design candidates, and acquiring a first evaluation value of each piece of design candidate data; selecting top at least one piece of design candidate data having the first evaluation value relatively high as first design candidate data, and generating second design candidate data including the design parameters from the first design candidate data; calculating a second evaluation value of the first design candidate data from the design parameters included in the first design candidate data, and calculating the second evaluation value of the second design candidate data from the design parameters included in the second design candidate data; and selecting design candidate data to be used as design data of the electric motor from among the first design candidate data and the second design candidate data from the second evaluation value.
This SCADA web HMI system comprises an address diversion source designation means and an address diversion means. The address diversion source designation means designates an existing component on a first screen as an address diversion source for a new component on a second screen, which is an address diversion destination. The address diversion means is used for causing the new component and the existing component to perform the same processing when the existing component is designated as the address diversion source for the new component by the address diversion source designation means. When an address assignment means has already assigned an address to the existing component, the address diversion means diverts the address of the existing component to the new component. A web browser displays an HMI screen, updates the display of the existing component on the first screen and the new component on the second screen according to a common display signal, and transmits operation signals corresponding to operations of the existing component and the new component to a common address of a PLC.
G06F 8/38 - Création ou génération de code source pour la mise en œuvre d'interfaces utilisateur
G05B 19/05 - Automates à logique programmables, p. ex. simulant les interconnexions logiques de signaux d'après des diagrammes en échelle ou des organigrammes
G06F 9/06 - Dispositions pour la commande par programme, p. ex. unités de commande utilisant des programmes stockés, c.-à-d. utilisant un moyen de stockage interne à l'équipement de traitement de données pour recevoir ou conserver les programmes
An electromagnetic wave detection device is one to detect an electromagnetic wave from an electromagnetic wave generation source in a second space partitioned by a partition plate to attenuate propagation of the electromagnetic wave from a first space in which the electromagnetic wave generation source is disposed, the electromagnetic wave detection device including an electromagnetic wave observation unit including: a metal wire having a penetrating portion to penetrate a through hole formed in the partition plate while being separated from a peripheral wall of the through hole; a protruding portion to protrude from the penetrating portion to the first space and receive the electromagnetic wave from the electromagnetic wave generation source; and an extending portion extending from the penetrating portion to the second space, in which one end portion located on the second space side is connected to a ground point located on the second space side.
This finishing-rolling mill roll balancing device is provided with a roll-balancing adjuster that before the leading end of rolled material wraps onto the coiler, adjusts respective rolling devices on the working end and driving end of the final mill stand to reduce asymmetrical flatness defects measured by a flatness gauge and eccentricity measured by an eccentricity gauge, and that after the leading end has wrapped onto the coiler, adjusts the rolling devices on the working end and driving end of the final mill stand to reduce wedges measured by a sheet-profile gauge.
B21B 37/58 - Commande de la force de laminageCommande de l'écartement des cylindres
B21B 1/26 - Méthodes de laminage ou laminoirs pour la fabrication des produits semi-finis de section pleine ou de profilésSéquence des opérations dans les trains de laminoirsInstallation d'une usine de laminage, p. ex. groupement de cagesSuccession des passes ou des alternances de passes pour laminer des bandes ou des feuilles en longueurs indéfinies selon un processus continu par laminage à chaud
09 - Appareils et instruments scientifiques et électriques
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
Radio control devices for remote monitoring and control of the functions and status of other electrical, electronic and mechanical devices and systems; equipment for measuring and monitoring energy consumption in controlled energy installations; downloadable and recorded computer software for managing or monitoring the energy consumption charges of monitored electricity installations; downloadable and recorded computer programs for remote monitoring, control and measurement Remote monitoring, remote control and remote telemetry of computer systems for the management and monitoring of energy consumption, and the providing information and advice relating thereto; design, creating or maintenance of computer programs; rental of computer hardware; providing temporary use of online non-downloadable computer programs for remote monitoring, control and measurement; providing visualization of energy usage through cloud computing, namely, providing graphical representation and analysis of energy usage data; server hosting; hosting of computer internet platforms; measurement, evaluation and analysis of energy consumption; technical advice in the field of energy conservation and energy efficiency
83.
VEHICLE TESTING APPARATUS AND METHOD OF CONTROLLING OPERATION OF VEHICLE TESTING APPARATUS
A displacement sensor according to the disclosure detects a tire turning angle of a tire, using a distance measurement region in the tire as a detection target to obtain angle measurement information. A controller receives the angle measurement information from the displacement sensor, determines a steering angle corresponding to the tire turning angle indicated by the angle measurement information, and outputs steering angle instruction information indicating the determined steering angle to a motor drive. The motor drive drives a rotation motor of a roller rotation mechanism according to the steering angle instruction information.
An uninterruptible power supply device (U) is provided with at least one power converter (1, 4, 5), a plurality of processors (7-12), a memory (15), and a memory access controller (13). The first processor (7) controls the at least one power converter (1, 4, 5) on the basis of information read from the memory (15), and writes control information in the memory (15). The second processor (8) measures a current and voltage input/output to/from at least one power converter (1, 3, 5), and writes measurement information in the memory (15). The third processor (9) exchanges information with other uninterruptible power supply devices and external devices, and writes reception information in the memory (15). The plurality of fourth processors (10) respectively generate a plurality of sets of trace data from the information stored in the memory (15). Trace conditions for generating corresponding trace data are set in advance in each of the plurality of fourth processors (10). Each of the plurality of fourth processors (10) stores the trace data generated according to the corresponding trace conditions in an external storage device.
H02J 9/06 - Circuits pour alimentation de puissance de secours ou de réserve, p. ex. pour éclairage de secours dans lesquels le système de distribution est déconnecté de la source normale et connecté à une source de réserve avec commutation automatique
A daisy-chain communication line of a power conversion system connects a master station for controlling a plurality of slave stations each including a power converter to the plurality of slave stations. The plurality of slave stations is configured to supply electric power to a load device from the power converter of each slave station. Each of the plurality of slave stations switches between “operation” for supplying electric power from the power converter and “suspension” for suspending supply of electric power and supplies electric power to the load device. The daisy-chain communication line includes a group of a first communication line for sending the control signal α and a second communication line for sending the operation permission signal β.
H02M 1/36 - Moyens pour mettre en marche ou arrêter les convertisseurs
H02M 1/00 - Détails d'appareils pour transformation
H02M 5/45 - Transformation d'une puissance d'entrée en courant alternatif en une puissance de sortie en courant alternatif, p. ex. pour changement de la tension, pour changement de la fréquence, pour changement du nombre de phases avec transformation intermédiaire en courant continu par convertisseurs statiques utilisant des tubes à décharge ou des dispositifs à semi-conducteurs pour transformer le courant continu intermédiaire en courant alternatif utilisant des dispositifs du type thyratron ou thyristor exigeant des moyens d'extinction utilisant uniquement des dispositifs à semi-conducteurs
A base member includes a bottom plate and a side plate. A plurality of first capacitors are aligned in a second direction on the bottom plate. The side plate is arranged upright in the first direction on the bottom plate. A pair of fin portions of each of fixation members are mounted on the side plate to fix the first capacitors to the base member. On the side plate, the fixation members on odd rows in the alignment direction are equal in position in the first direction. The fixation members on even rows in the alignment direction are equal in position in the first direction and differ in position in the first direction from the fixation members on the odd rows. The fin portions of two fixation members, adjacent to each other in the second direction, are aligned in the first direction.
The art of the present disclosure is applied to a control system for a continuous rolling machine comprising a rolling stand. The control system according to the present disclosure comprises a storage device for holding training data calculated on the basis of time-series data acquired during rolling. The control system calculates a set value of the roller speed of the rolling stand on the basis of the training data, acquires a correction command value performed on the set value while the steel sheet is passing through the continuous rolling mill, and updates the training data on the basis of the acquired correction command value.
A power conditioning system having a controller which includes voltage recognition circuitry that recognizes a voltage value of a voltage to be generated by a circuit component, a voltage calculation circuitry that calculates a voltage calculation value on the basis of the voltage value recognized by the voltage recognition circuitry, failure determination circuitry that compares the voltage calculation value calculated by the voltage calculation circuitry with a predetermined threshold and determines that a failure occurs in an AC capacitor in a case where the voltage calculation value is smaller than the predetermined threshold, and operation control circuitry that stops a power conditioner in a case where the failure determination circuitry determines that a failure occurs in the AC capacitor during operation of the power conditioner.
A frequency stabilization system according to an aspect includes: a power conversion unit configured to convert DC power into AC power and output the AC power to a power grid, the DC power being output by at least any of a photovoltaic panel and a storage battery; a bidirectional DC converter that is connected to the storage battery in series, the bidirectional DC converter being configured to control charging and discharging of the storage battery for the power conversion unit based on an active-power command value; a grid frequency detection unit configured to detect a grid frequency of AC power to be output to the power grid by the power conversion unit; a necessary-power calculation section configured to calculate power necessary for the power grid based on the detected grid frequency; a command value calculation section configured to calculate an active-power command value for the bidirectional DC converter based on the calculated necessary power; and an output control section configured to control a charging or discharging output of the storage battery to the power conversion unit by the bidirectional DC converter based on the calculated active-power command value.
A preventive maintenance system according to an embodiment of the present invention comprises: an induction heating device having an inductor including a coil that heats a material to be heated by electromagnetic induction of a high-frequency current from an inverter; a voltage detector that detects and outputs a voltage of the coil; a current detector that detects and outputs a current of the coil; and a control device that calculates an impedance of a circuit including the coil on the basis of the detected voltage and current. The control device calculates the impedance on the basis of the voltage and current detected before the material to be heated reaches the coil or after the material to be heated is discharged from the coil, and stores the calculated impedance in association with each time when the voltage and the current used to calculate the impedance are detected.
A plurality of semiconductor modules (M) are arranged on the first surface of a substrate (30) so as to be aligned along a first direction orthogonal to the vertical direction of this power conversion device. Each capacitor (40) has a cylindrical portion (44) and electrode terminals (42P, 42N) disposed at a first end portion in the extending direction of the cylindrical portion (44). At least one first capacitor (40_1) is disposed on the second surface side of the substrate (30) such that the extending direction of the cylindrical part (44) is a second direction orthogonal to the vertical direction and the first direction. At least one second capacitor (40_2) is disposed on the second surface side of the substrate (30) such that the extending direction of the cylindrical part (44) is the second direction and the electrode terminals (42P, 42N) are positioned opposite the electrode terminals (42P, 42N) of the at least one first capacitor (40_1) in the second direction. In a plan view seen from the first direction, the at least one first capacitor (40_1) and the at least one second capacitor (40_2) are disposed such that parts of the respective cylindrical portions (44) overlap with each other in the vertical direction and the second direction.
H02M 7/48 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande
H02M 7/12 - Transformation d'une puissance d'entrée en courant alternatif en une puissance de sortie en courant continu sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande
An electrolytic cell power supply device is provided, the electrolytic cell power supply device includes: a first converter configured to convert alternating current power supplied from a power system into direct current power; a storage element configured to store direct current power output from the first converter; a second converter configured to convert the direct current power stored in the storage element into other direct current power corresponding to the electrolytic cell, and supply the direct current power after the conversion between the anode and the cathode of the electrolytic cell; and a control device configured to control operations of the first and second converters, the control device includes a corrosion prevention operation mode In a power interruption of the power system, the corrosion prevention operation mode controlling the operation of the second converter to suppress a generation of a reverse current by supplying, to the electrolytic cell, a direct current power. Accordingly, an electrolytic cell power supply device that can suppress the generation of a reverse current with a simpler configuration is provided.
The purpose of the present disclosure is to provide a structure for an active gas generation device capable of supplying high-purity active gas without complicating the manufacturing process. In the present invention, an electrode unit (81) includes a dielectric protection film (FC2) that takes, from between dielectric films (F2) and (F3), the dielectric film (F2) as the dielectric film to be protected, and that is closely adhered to the lower surface of the dielectric film F2. A discharge space (4) is provided in a dielectric space (18) which is a space in which the dielectric protection film (FC2) and the dielectric film (F3) face each other, the discharge space including a region in which a high-voltage electrode (F5) and a ground electrode (F6) overlap in plan view. The constituent material of the dielectric protection film (FC2) has the protective characteristics of blocking the irradiation of ions generated by the dielectric barrier discharge to the dielectric film (F2) when the dielectric barrier discharge occurs in the discharge space (4), and not chemically reacting with the ions.
This control device for a multi-level power conversion system is a control device in a multi-level power conversion system having a multi-level power converter and a control device and using a carrier level shift modulation method, said multi-level power converter having a plurality of semiconductor switching elements and a plurality of neutral point elements. The control device performs: a process for generating a modulation wave on the basis of a voltage command value of each phase; a process for generating a carrier wave that is a triangular wave signal having a predetermined carrier period; a process for generating an injection carrier that is a signal that varies in a predetermined amplitude range and has the same carrier period as and an opposite phase to the carrier wave; a process for generating a modulated wave by performing a carrier injection control for superimposing the modulation wave and the injection carrier; and a process for generating a gate signal for controlling the operations of the plurality of semiconductor switching elements and the plurality of neutral point elements in the multi-level power converter, on the basis of the result of comparing the modulated wave obtained by the carrier injection control with a plurality of carrier waves.
A power supply device according to an embodiment is configured to supply DC power to an electrolytic cell producing hydrogen by electrolysis. The power supply device includes a power converter, a reactor, and a filter circuit; the power converter is self-commutated and includes a first output terminal and a second output terminal; the second output terminal is configured to output a positive voltage with respect to the first output terminal; the reactor is connected in series to at least one of the first output terminal or the second output terminal; and the filter circuit is connected between an anode and a cathode of the electrolytic cell. The filter circuit is a low-pass filter. A cutoff frequency of the filter circuit is set to be less than a switching frequency of the power converter.
H02M 1/14 - Dispositions de réduction des ondulations d'une entrée ou d'une sortie en courant continu
H02M 3/155 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu sans transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs
H02M 7/04 - Transformation d'une puissance d'entrée en courant alternatif en une puissance de sortie en courant continu sans possibilité de réversibilité par convertisseurs statiques
The purpose of the present disclosure is to provide a configuration of a chassis dynamometer that has a more compact installation space. A roller (2) in a roller device (100) that is provided to a chassis dynamometer according to the present disclosure includes a motor (2) that is provided within a roller outer frame body (10). In the motor (2), a rotation shaft (21) is attached to the roller outer frame body (10) so as to be able to rotate in conjunction with a rotation operation of a motor rotor (71), and an oscillation shaft (21) is attached to a stator structure (72) and does not operate in conjunction with the rotation operation of the motor rotor (71). The rotation shaft (21) is supported by a bearing stand (11) for rotation, and the oscillation shaft (22) is supported by a bearing stand (12) for oscillation. A cooling fan (50) that supplies a cooling airflow (F2) to the motor (7) is provided to the outside of the roller (2).
This uninterruptible power supply system comprises: N uninterruptible power supply devices (U) connected in parallel between an AC power supply (1) and a load (2); a current detector for detecting a load current; and a control device. N is an integer that is 2 or more, and M is an integer that is 1 or more and less than N. The uninterruptible power supply devices (U) include a converter (14) and an inverter (18). The uninterruptible power supply devices (U) are configured to be capable of switching between: a first power supply mode in which DC power generated by the converter (14) is supplied to the inverter (18) and stored in a power storage device (B); and a second power supply mode in which the DC power of the power storage device (B) is supplied to the inverter (18). In a case where the AC power supply (1) is sound and the load current detected by the current detector is smaller than a threshold current, the control device sets M uninterruptible power supply devices (U) among the N uninterruptible power supply devices (U) to the second power supply mode and sets N−M uninterruptible power supply devices (U) to the first power supply mode.
H02J 9/06 - Circuits pour alimentation de puissance de secours ou de réserve, p. ex. pour éclairage de secours dans lesquels le système de distribution est déconnecté de la source normale et connecté à une source de réserve avec commutation automatique
At least one first power converter of a plurality of power converters has a charging mode and a standby mode, the charging mode being a mode of converting AC power supplied from an AC power supply through a switch into DC power and storing the DC power in a corresponding power storage device, the standby mode being a mode of generating a control signal for power conversion and awaiting the power conversion. When an AC voltage supplied from the AC power supply is normal, a controller turns on the switch and alternately switches the at least one first power converter between the charging mode and the standby mode. When the AC voltage is not normal, the controller turns off the switch and controls the plurality of power converters such that each of the plurality of power converters converts DC power of the power storage device into AC power and supplies the AC power to a load.
H02J 9/06 - Circuits pour alimentation de puissance de secours ou de réserve, p. ex. pour éclairage de secours dans lesquels le système de distribution est déconnecté de la source normale et connecté à une source de réserve avec commutation automatique
H02J 7/34 - Fonctionnement en parallèle, dans des réseaux, de batteries avec d'autres sources à courant continu, p. ex. batterie tampon
H02M 1/00 - Détails d'appareils pour transformation
H02M 3/335 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu avec transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrodes de commande pour produire le courant alternatif intermédiaire utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs
H02M 7/48 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant alternatif sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande
This electric power conversion device (1) comprises: arms (A1-A3) that include a plurality of series-connected unit converters (5) and that are connected to an AC power supply (8); and a control device (7) that controls the arms. Each of the unit converters includes a capacitor (15). The control device includes an inspection unit (53) that is provided in correspondence with each of the unit converters and that inspects the corresponding capacitor. If the voltage (VPP) of an AC component (Vac) included in the voltage (VDC) across terminals of the corresponding capacitor is higher than a threshold voltage (Vt), the inspection unit determines that the corresponding capacitor needs to be replaced with a new one. Accordingly, it is possible to determine whether each of the plurality of capacitors needs to be replaced with a new one while operating the electric power conversion device.
In the present invention, at a transition time point at which a transition has occurred from rolling to an idling state, a rolling/idling prediction unit predicts the time it will take for a next material to be rolled to reach a roller. A cooling water quantity monitor unit acquires a quantity of cooling water being supplied to a nozzle at the transition time point. A roller thermal expansion prediction unit sets the time predicted by the rolling/idling prediction unit as a prediction period and predicts thermal expansion of the roller for the prediction period and at the transition time point. A cooling water quantity reduction computation unit, while coordinating with the roller thermal expansion prediction unit, computes a cooling water quantity which is to be reduced within the prediction period so that the difference between the thermal expansion at the transition time point and the thermal expansion for the prediction period is kept within a prescribed range. A variable flow rate valve adjustment unit adjusts the aperture of a variable flow rate valve so that the cooling water quantity is reduced only by the quantity computed by the cooling water quantity reduction computation unit.
B21B 28/02 - Maintenance des cylindres en état de fonctionnement, p. ex. remise en état
B21B 45/02 - Dispositifs pour le traitement de surface des pièces spécialement combinés aux laminoirs, disposés dans les laminoirs, ou adaptés pour être utilisés avec les laminoirs pour lubrifier, refroidir ou nettoyer
