The application relates to an OPW airbag which is woven into a part, comprising warp threads and weft threads, which are woven so as to produce at least three woven fabric layers, a lower fabric layer (UG), an upper fabric layer (OG), and a central fabric layer (MG) arranged therebetween. The airbag is characterized in that the warp threads and weft threads of the central fabric layer (MG) float in a selected through-flow region (DSB).
B60R 21/233 - Inflatable members characterised by their shape, construction or spatial configuration comprising a plurality of individual compartmentsInflatable members characterised by their shape, construction or spatial configuration comprising two or more bag-like members, one within the other
B32B 5/02 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments
B32B 27/12 - Layered products essentially comprising synthetic resin next to a fibrous or filamentary layer
A multi-channel charging system includes a power source supplying power, a transformer connected to the power source, a plurality of charging ports connected to the transformer and charging or discharging each object, a converter converting power between the power source and the transformer or between the object and the transformer, and a controller controlling the converter or each of the objects, wherein the controller transmits/receives a signal to or from each of the objects, controls power transmission/reception between each of the objects, or controls power transmission/reception between the power source and the objects.
B60L 53/66 - Data transfer between charging stations and vehicles
3.
One-piece woven (OPW) pressure-responsive air outlet, in particular for application to airbag discharge openings, as well as an airbag with such an air outlet sewn thereto
A one-piece woven pressure-responsive air outlet, for use as a vent, for application to airbag discharge openings, includes a lower fabric layer, a middle fabric layer and an upper fabric layer. The lower fabric layer includes warp and weft threads and an inflow region in which the warp and weft threads float. The middle fabric layer includes warp and weft threads and a flow-through region in which the warp and weft threads float. The lower and middle fabric layers include a first chamber and a second chamber downstream of the first chamber in a flow direction. At least one of the chambers is sealed with a thread breakage zone, in which between the fabric layers, selected (warp) threads of one fabric layer are merely tacked to selected (weft) threads of the other fabric layer and are capable of breaking or rupturing at a predefined internal pressure in the chamber.
D03D 11/02 - Fabrics formed with pockets, tubes, loops, folds, tucks or flaps
B60R 21/00 - Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
The present invention relates to an initial driving device and method for a solid-state transformer, in which an internal capacitor of a solid-state transformer is charged using a battery already possessed, instead of a separate external power source, so as to reduce overall parts of the solid-state transformer to improve the system reliability. The initial driving device for the solid-state transformer according to the present invention comprises: an AC/DC converter which converts a grid power into a direct current; a high voltage conversion unit which converts the output of the AC/DC converter into a high voltage; a medium frequency transformer (MFT) which converts the output of the high voltage conversion unit into a low voltage; a low voltage conversion unit which converts the output of the MFT into a charging voltage of an electric vehicle or a battery; and a control unit which controls operations of the AC/DC converter, the high voltage conversion unit, the MFT, and the low voltage conversion unit.
H02M 1/36 - Means for starting or stopping converters
H02M 3/07 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode
The present invention relates to a composite charging system and method capable of producing charging power for an electric vehicle by utilizing hydrogen energy supplied to a hydrogen vehicle, and compositely connecting hydrogen energy with a power system to efficiently perform charging of the electric vehicle, and more flexibly coping with the use of energy.
The composite charging system according to the present invention comprises: a hydrogen charger which charges hydrogen into a vehicle; a hydrogen power supply system which generates and supplies power on the basis of hydrogen; a system power supply system which supplies power from a power system; an electric charger which charges the electric vehicle; and a battery power supply system which stores power supplied from the hydrogen power supply system and the system power supply system, and supplies the stored power to the electric charger.
The invention relates to an OPW airbag which is woven into a part, comprising warp threads and weft threads, which are woven so as to produce at least three woven fabric layers, a lower fabric layer (UG), an upper fabric layer (OG), and a central fabric layer (MG) arranged therebetween. The airbag is characterized in that the warp threads and weft threads of the central fabric layer (MG) float in a selected through-flow region (DSB).
D03D 11/02 - Fabrics formed with pockets, tubes, loops, folds, tucks or flaps
B60R 21/233 - Inflatable members characterised by their shape, construction or spatial configuration comprising a plurality of individual compartmentsInflatable members characterised by their shape, construction or spatial configuration comprising two or more bag-like members, one within the other
A multi-channel charging system according to one embodiment may comprise: a power supply source for supplying power; a transformer connected to the power supply source; a plurality of charging ports, which are connected to the transformer and charge or discharge each object; a converter for converting power between the power supply source and the transformer or between the object and the transformer; and a control unit for controlling the converter or each object, wherein the control unit transmits/receives a signal to/from each object or can control the transmission/reception of power between the respective objects or control the transmission/reception of power between the objects and the power supply source.
The present invention relates to a composite charging system and method capable of producing charging power for an electric vehicle by utilizing hydrogen energy supplied to a hydrogen vehicle, and compositely connecting hydrogen energy with a power system to efficiently perform charging of the electric vehicle, and more flexibly coping with the use of energy. The composite charging system according to the present invention comprises: a hydrogen charger which charges hydrogen into a vehicle; a hydrogen power supply system which generates and supplies power on the basis of hydrogen; a system power supply system which supplies power from a power system; an electric charger which charges the electric vehicle; and a battery power supply system which stores power supplied from the hydrogen power supply system and the system power supply system, and supplies the stored power to the electric charger.
B60L 58/40 - Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for controlling a combination of batteries and fuel cells
B60L 53/24 - Using the vehicle's propulsion converter for charging
H02J 3/32 - Arrangements for balancing the load in a network by storage of energy using batteries with converting means
11.
Sensorless prediction method of overcurrent in isolated bidirectional DC-DC converter
Proposed is a method for accurately predicting an overcurrent flowing inside an isolated bidirectional DC-DC converter even without using a current sensor on primary and secondary sides of a transformer. In the converter according to the present disclosure, an average value of the inductor current is calculated after deriving inflection point current values by respectively modeling a current waveform for an inductor current of the transformer. A secondary side output current average value is calculated by comparing the calculated average value of the inductor current with a secondary side capacitor current average value of the converter at no load. Next, an error between the secondary side output current average value and an actually measured secondary side output current is calculated, and the inflection point current values of the current waveform are updated using a gain for reducing the error through PI control, whereby the overcurrent may be predicted.
H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
H02M 1/32 - Means for protecting converters other than by automatic disconnection
A power facility for remote control includes: an analog sensing value reception unit that collects an internal analog sensing value of the power facility; a digital conversion unit that converts the analog sensing value into digital information; and a communication unit that transmits the digital information to an external remote control device by using one optical path. Therefore, by allowing a plurality of analog sensing values from the power facility to be transmitted to the remote control device by using one optical path, transmission efficiency can be increased, and by converting a plurality of analog sensing values of the power facility into digital information and transmitting the digital information with an asynchronous frame, the plurality of analog sensing values can be efficiently transmitted through one optical path without a separate synchronous signal.
H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
An arrangement for mending a pipe, particularly a waste water pipe, which arrangement comprises the following elements: a first textile hose (ALg) woven in a single piece preferably laminated on the outer wall thereof, a felt hose (FS) arranged in the interior of the first textile hose (ALg) and wetted with a curable synthetic resin mixture, and a second textile hose (ALs), woven in a single piece and coated on its outer wall with a release agent, preferably silicon, not adhering to the synthetic resin mixture, for introduction into the felt hose (FS). A method for mending a pipe, particularly a waste water pipe, preferably uses the arrangement described.
B32B 41/00 - Arrangements for controlling or monitoring lamination processesSafety arrangements
B29C 63/20 - Lining or sheathing, i.e. applying preformed layers or sheathings of plasticsApparatus therefor using tubular layers or sheathings using pressure difference, e.g. vacuum
B32B 5/02 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments
B32B 5/26 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer another layer also being fibrous or filamentary
F16L 55/165 - Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe being inserted in the damaged section
The invention relates to an OPW (one piece woven) airbag comprising warp threads and weft threads which are woven into at least three woven fabric layers, a lower fabric layer (UG), an upper fabric layer (OG), and a central fabric layer (MG) arranged therebetween. The warp threads and weft threads of the central fabric layer (MG) protrude out of the central fabric layer (MG) and completely float between the lower fabric layer (UG) and the upper fabric layer (OG) in a first sub-region (ETB) of the OPW airbag and are integrated into the lower fabric layer (UG) or into the upper fabric layer (OG) in a second sub-region (ZTB) of the OPW airbag.
D03D 13/00 - Woven fabrics characterised by the special disposition of the warp or weft threads, e.g. with curved weft threads, with discontinuous warp threads, with diagonal warp or weft
B32B 7/05 - Interconnection of layers the layers not being connected over the whole surface, e.g. discontinuous connection or patterned connection
B32B 5/26 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer being a fibrous or filamentary layer another layer also being fibrous or filamentary
B32B 5/02 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by structural features of a layer comprising fibres or filaments
B60R 21/233 - Inflatable members characterised by their shape, construction or spatial configuration comprising a plurality of individual compartmentsInflatable members characterised by their shape, construction or spatial configuration comprising two or more bag-like members, one within the other
B60R 21/235 - Inflatable members characterised by their material
A power equipment for remote control, in the present invention, comprises: an analog sensing value reception unit for collecting an analog sensing value inside power equipment; a digital conversion unit for converting the analog sensing value to digital information; and a communication unit for transmitting the digital information to an external remote control device by using one optical line. Therefore, the present invention can transmit, to the remote control device, a plurality of analog sensing values in the power equipment by using one optical line, and thus can increase transmission efficiency, and can convert the plurality of analog sensing values in the power equipment to the digital information and transmit same as an asynchronous frame, and thus can efficiently transmit same through one optical line without a separate synchronous signal.
An OPW airbag having warp and weft threads woven together in at least three woven fabric layers: a lower fabric layer, an upper fabric layer, and a middle fabric layer therebetween. The weft threads of the middle fabric layer emerge from the middle fabric layer in a first partial region of the airbag and are tied partially to the upper fabric layer and partially to the lower fabric layer. The warp threads of the middle fabric layer emerge from the middle fabric layer in the first partial region of the airbag and float freely between the lower fabric layer and the upper fabric layer. The weft and warp threads of the middle fabric layer are incorporated into the lower fabric layer or into the upper fabric layer in a second partial region of the airbag or are tied to the lower or upper fabric layer at a few attachment points.
B60R 21/16 - Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
D03D 11/00 - Double or multi-ply fabrics not otherwise provided for
D03D 13/00 - Woven fabrics characterised by the special disposition of the warp or weft threads, e.g. with curved weft threads, with discontinuous warp threads, with diagonal warp or weft
B60R 21/235 - Inflatable members characterised by their material
An OPW airbag has warp and weft threads woven together in a lower fabric layer, an upper fabric layer and a middle fabric layer arranged therebetween. The airbag has, arranged along a longitudinal axis, front, middle and rear portions. A generator mouth and an inflow region are in the front portion. Upper and lower main chambers are in the middle portion. A first plurality of lower stiffening chambers is in the rear portion between the middle and lower fabric layers. A second plurality of upper stiffening chambers is in the rear portion between the middle and upper fabric layers. At least one upper stiffening chamber, which is narrower compared to the lower stiffening chamber, is associated with each lower stiffening chamber. The lower stiffening chambers are each spaced apart by lower woven seams. Bridge chambers, which cover the lower woven seams, are arranged between the middle and upper fabric layers.
01 - Chemical and biological materials for industrial, scientific and agricultural use
09 - Scientific and electric apparatus and instruments
Goods & Services
Surface-coating chemicals for LCD; surface-coating chemicals
for OLED; surface-coating chemicals for PDP; chemical
preparations for use in industry; heat radiation coatings
for LED; organic acid compounds; compositions for the
manufacture of technical ceramics; chemicals for X-ray film
processing; chemical additives for use in manufacture;
catalysts for use in chemical processes. Polaroid film for LED panel; film for LCD panels; optical
films for LCD; prism films for LCD; LED optical film;
conductive film for OLED display; transparent electrode film
for OLED display; optical films for displays; optical film
for polarizer; conductive film for flexible display;
transplant electrode film for flexible display; polymethyl
methacrylate (PMMA) sheet for LCD; microlens films for LCD;
complex films for LCD; LED inspection apparatus; LED desk
lamps display; electronic display panels; inspection
equipment for display panel; electric luminescent display
panels; flat panel display screens; ELD display panel;
organic light emitting diodes (oled); optical inspecting
equipment; reflective plates for liquid crystal displays;
optical sensors; optical filters for plasma display panels;
LED circuit; electric plugs; physical and chemical
laboratory apparatus and instruments; optical apparatus and
instruments, except for glasses and photographic apparatus;
precision measuring apparatus; measuring instruments;
apparatus and instruments for testing material; electrical
controllers; panels for the connection of electricity;
optical fiber connectors; module for LCD.
19.
SENSORLESS PREDICTION METHOD OF OVERCURRENT IN ISOLATED BIDIRECTIONAL DC-DC CONVERTER
Disclosed is a method for accurately predicting an overcurrent flowing inside an isolated bidirectional DC-DC converter, without using current sensors on the primary and secondary sides of a transformer. In the isolated bidirectional DC-DC converter according to the present invention, a current value is derived at an inflection point by modeling the respective current waveforms of inductor currents of the transformer, and the average value of the inductor currents is then calculated. A secondary-side output current average value is calculated by comparing the calculated average value of the inductor currents with a secondary-side capacitor current average value. Next, the error between the secondary-side output current average value and an actually measured secondary-side output current is calculated, and the inflection point current value of the current waveforms is updated using a gain for reducing the error through PI control. The overcurrent of the inductor current is predicted on the basis of the updated inflection point current value.
G01R 31/28 - Testing of electronic circuits, e.g. by signal tracer
H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
01 - Chemical and biological materials for industrial, scientific and agricultural use
40 - Treatment of materials; recycling, air and water treatment,
Goods & Services
High purity mixture gas for cleaning semiconductor; high
purity nitrogen compounds for etching semiconductor; high
purity mixture gas for cleaning display; high purity NF3 for
cleaning display; special gas for chemical purposes used for
cleaning semiconductor equipment; mixture gas for use in the
manufacture of semiconductors; gas for processing
semiconductor; ultra high purity gas for use in the
manufacture of semiconductors; Nitron Fluorine Three (NF3);
high purity mixture gas for cleaning solar batteries;
special gas for chemical purposes; fluoride for cleaning
purposes; gas purifying preparations; degassing agents;
carbonic acid gas; chemical preparations for use in
industry; quenching fluids for use in metalworking;
detergents for metal surface (not including detergents for
household purposes); coolants; chemical compositions for
metal plating; inorganic industrial chemicals; oxides;
hydrates; alkalies; compressed air; organic industrial
chemicals; organic acids; argon; nitrogen; nitrogen
compounds; catalysts for use in chemical processes;
antifreeze; bromine for chemical purposes; chemical
sorbents; enzyme stabilizers; salts [chemical preparations];
bases [chemical preparations]; etchants for use in the
manufacture of semiconductors. Gas production services; gas processing services; gas
compression services; purification of gases; petroleum gas
liquefaction; treatment of hazardous gases; processing of
natural gas; refining of natural gas; processing and
assembly of semiconductors; polishing of semiconductor;
recycling of chemicals; natural gas liquefaction services;
processing of metal surface using industrial chemicals;
treatment and coating of metal surfaces; coating of metal
surfaces using physical vapor deposition or chemical vapor
deposition processes; mineral accurate treatment; chemical
treatment of liquids; organic accurate treatment; processing
of compounds; processing of chemicals.
01 - Chemical and biological materials for industrial, scientific and agricultural use
40 - Treatment of materials; recycling, air and water treatment,
Goods & Services
High purity nitrogen gases for cleaning display; Nitron Fluorine Three gases (NF3) for cleaning; Fluorine gas for cleaning purposes; Nitrogen gas Gas production services; gas processing services; gas compression services; purification of gases; petroleum gas liquefaction; treatment of hazardous gases; processing of natural gas; refining of natural gas; processing and assembly of semiconductors; polishing of semiconductor; recycling of chemicals; natural gas liquefaction services; processing of metal surface using industrial chemicals; treatment and coating by means of galvanization of metal surfaces; coating of metal surfaces using physical vapor deposition or chemical vapor deposition processes; mineral accurate treatment; chemical treatment of liquids; organic accurate treatment of chemicals; processing in the nature of treatment of chemical compounds; processing in the nature of treatment of chemicals
22.
ARRANGEMENT AND METHOD FOR MENDING A PIPE, PARTICULARLY A WASTE WATER PIPE
The invention relates to an arrangement for mending a pipe, particularly a waste water pipe, which arrangement comprises the following elements: a first textile hose (ALg) woven in a single piece preferably laminated on the outer wall thereof, a felt hose (FS) arranged in the interior of the first textile hose (ALg) and wetted with a curable synthetic resin mixture, and a second textile hose (ALs), woven in a single piece and coated on its outer wall with a release agent, preferably silicon, not adhering to the synthetic resin mixture, for introduction into the felt hose (FS). The invention further relates to a method for mending a pipe, particularly a waste water pipe, preferably using the arrangement described.
The invention relates to an OPW airbag comprising warp threads and weft threads which are woven into at least three woven fabric layers, a lower fabric layer (UG), an upper fabric layer (OG), and a central fabric layer (MG) arranged therebetween. The warp threads and weft threads of the central fabric layer (MG) protrude out of the central fabric layer (MG) and completely float between the lower fabric layer (UG) and the upper fabric layer (OG) in a first sub-region (ETB) of the OPW airbag and are integrated into the lower fabric layer (UG) or into the upper fabric layer (OG) in a second sub-region (ZTB) of the OPW airbag.
B60R 21/231 - Inflatable members characterised by their shape, construction or spatial configuration
B60R 21/233 - Inflatable members characterised by their shape, construction or spatial configuration comprising a plurality of individual compartmentsInflatable members characterised by their shape, construction or spatial configuration comprising two or more bag-like members, one within the other
The invention relates to a one-piece woven airbag, in particular for vehicle restraint systems, with an upper fabric and a lower fabric which are joined together in a single-ply seam area forming the border of the airbag, with tether threads which are woven partially into the upper fabric and partially into the lower fabric and float there between over a defined length, which is characterized by upper limiting threads which are woven into the upper fabric and/or lower limiting threads which are woven into the lower fabric, the limiting threads between upper fabric and lower fabric floating over a defined number of floating tether threads and being attached to attachment points of their fabric layer.
Device for fixing a connection to an OPW airbag, with an expansion sleeve (2), with a plurality of expansion shells (4), and a mandrel (6) extending longitudinally through the expansion sleeve (2) having a stretching piece (8) arranged in the vicinity of the expansion shells (4), the outer diameter of which stretching piece is greater than the inner diameter of the expansion shells (4).
The present invention relates to a responsive gas insulated bus (GIB) support structure. To this end, the present invention comprises: a support; a speed-responsive unlocking part provided at an upper part of the support and having a shape in which a guide is exposed from the both sides thereof; and a bracket which is disposed at a flange of a tank and to which the guide coupled. In the present invention, therefore, when deformation of the structure is large or slow upon the occurrence of a length change due to pressure variation or heat, the speed-responsive unlocking part for supporting the structure is configured to maintain an unlocked state and thus fully absorb the deformation amount to prevent the structure from being deformed and broken.
H02G 5/06 - Totally-enclosed installations, e.g. in metal casings
F16L 3/18 - Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets with special provision allowing movement of the pipe allowing movement in axial direction
27.
BLUE LED DEVICE FOR DISPLAY, COMPRISING RED ORGANIC-INORGANIC COMPOSITE LIGHT-EMITTING MATERIAL
The present invention relates to a blue LED device for a display, comprising a red organic-inorganic composite light-emitting material allowing high color reproduction and, specifically, to a blue LED device for a display, comprising a red organic-inorganic composite light-emitting material having a composition of chemical formula 1 below. [Chemical formula 1] [(Ax1,Rx2)(L)y(X)]n wherein in chemical formula 1, A includes at least one metal ion or a metal compound thereof, the metal ion being selected from the group consisting of a monovalent metal ion selected from Li, Na, or K, a bivalent metal ion selected from Mg, Ca, Sr, Ba, or Zn, a trivalent metal ion selected from Al or La, or a tetravalent metal ion selected from Zr or Ti; R includes one selected from Eu or an Eu compound; L includes one selected from aromatic compounds having at least two carboxylic acid groups; X includes at least one selected from phenanthroline and a derivative thereof; x1 satisfies 0≤x1<2; x2 satisfies 0
The present invention relates to an LED package comprising a red organic-inorganic hybrid light-emitting material and a backlight unit employing the same and, specifically, to an LED package comprising a red organic-inorganic hybrid light-emitting material having a composition of chemical formula 1 below, and a backlight unit employing the same. [Chemical Formula 1] [(Ax1,Rx2)(L)y(X)]n, wherein A comprises at least one metal ion or a metal compound thereof, the metal ion being selected from the group consisting of a monovalent metal ion selected from Li, Na, or K, a bivalent metal ion selected from Mg, Ca, Sr, Ba, or Zn, a trivalent metal ion selected from Al or La, or a tetravalent metal ion selected from Zr or Ti; R comprises at least one selected from Eu or an Eu compound; L comprises one selected from aromatic compounds having at least two carboxylic acid groups; X comprises at least one selected from phenanthroline and derivatives thereof; x1 satisfies 0≤x1<2; x2 satisfies 0
The present invention relates to an LED light emitting device comprising a red organic-inorganic composite light emitting material having a composition of the following chemical formula (1): [chemical formula 1] [(A x1,Rx2)(L)y(X)]n, wherein A comprises at least one metal ion or a metal compound thereof selected from the group consisting of a monovalent metal ion selected from Li, Na or K, a bivalent metal ion selected from Mg, Ca, Sr, Ba or Zn, a trivalent metal ion selected from Al or La, or a tetravalent metal ion selected from Zr or Ti; R comprises at least one selected from Eu or an Eu compound; L comprises at least one selected from aromatic compounds having at least two carboxylic acid groups; X comprises at least one selected from phenanthroline and derivatives thereof; 0≤x1<2; 0
H01L 51/50 - Solid state devices using organic materials as the active part, or using a combination of organic materials with other materials as the active part; Processes or apparatus specially adapted for the manufacture or treatment of such devices, or of parts thereof specially adapted for light emission, e.g. organic light emitting diodes (OLED) or polymer light emitting devices (PLED)
H01L 51/56 - Processes or apparatus specially adapted for the manufacture or treatment of such devices or of parts thereof
30.
RED ORGANIC-INORGANIC COMPOSITE LIGHT EMITTING MATERIAL AND METHOD FOR PRODUCING SAME
The present invention relates to a red organic-inorganic composite light emitting material and a method for producing the same, the red organic-inorganic composite light emitting material having a composition of the following chemical formula 1. [Chemical formula 1] [(A x1,Rx2)(L)y(X)]n, wherein A includes at least one metal ion or a metal compound thereof selected from the group consisting of a monovalent metal ion selected from Li, Na and K, a divalent metal ion selected from Mg, Ca, Sr, Ba and Zn, a trivalent metal ion selected from Al and La, and a tetravalent metal ion selected from Zr and Ti; R includes one selected from Eu and an Eu compound; L includes one selected from aromatic compounds having at least two carboxylic acid groups; X includes at least one selected from phenanthroline and a derivative thereof; and x1 is 0≤x1<2, x2 is 0
The present invention relates to a phosphor plate using a light diffuser and, more specifically, to a phosphor plate into which a light diffuser is added so as to diffuse light within the plate, thereby increasing the efficiency of light to be converted.
The present invention is characterized in that a pentaerythritol tetracaprylate component is contained in an amount of 40 to 60 wt% on the basis of the total weight of a spin finish oil, the content of sulfur contained in an active ingredient of the spin finish oil other than water or mineral oil is less than 0.5 wt%, and a polyethylene terephthalate yarn for airbags is woven with a fabric by oiling using 0.4 to 1.0 wt% of the spin finish oil having a maximum emulsion viscosity of less than 5,000 cP. At this time, if the above-mentioned range is exceeded, a large amount of the spin finish oil remains after refining, resulting in the drawback of coating adhesion degradation. In the case of using the polyethylene terephthalate yarn for an airbag of the present invention, the spin finish oil remaining on scouring paper reduces the degradation of coating adhesion, and thus it is possible to secure more than 1000 times of scrub performance after 21 days of coating, even under the conditions in which the residual amount of the spin finish oil remaining on the scouring paper due to insufficient scouring exceeds 0.2 wt%, and a curing time is short when coated with silicone.
D03D 15/00 - Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
The present invention aims to provide an LED package with improved light extraction efficiency, which contains a rare earth metal oxide and a resin for sealing the LED package, and a BLU to which the LED package is applied.
The present invention relates to an infrared LED package comprising rare-earth metal oxide particles and, more specifically, to an infrared LED package which is provided with an infrared LED chip and an LED encapsulant comprising, in a polymer resin, a compound represented by chemical formula 1 and thus has an infrared wavelength of 700-940 nm. [Chemical Formula 1] Ma(OH)b(CO3)cOd, wherein M is Sc, Y, La, Al, Lu, Ga, Zn, V, Zr, Ca, Sr, Ba, Sn, Mn, Bi, or Ac, a is 1 or 2, b is 0-2, c is 0-3, and d is 0-3. b, c and d are not simultaneously 0, and b and c are either simultaneously 0 or simultaneously not 0.
The present invention provides a method for preparing a high-viscosity isosorbide polyethylene terephthalate polymer, comprising: a step of preparing a slurry by mixing ethylene glycol (EG), terephthalic acid (TPA) and isosorbide of the following chemical formula 1; an esterification step of the slurry; a melt polymerization step; and a solid state polymerization step, wherein the isosorbide is injected in an amount of 4.0-10 mol%, and more preferably, 4-6 mol% on the basis of TPA. The present invention can prepare a high-viscosity isosorbide polyethylene terephthalate polymer, which can be used in an industrial fiber, by adding isosorbide when preparing the polyethylene terephthalate polymer.
Provided is a method for manufacturing a polyester film by using a simultaneous biaxial stretching method, such that longitudinal and transverse draw ratios are 3.5-4.0 times, the relaxation rate is 5-10%, the temperature range of a stretching zone within a tenter is 80-110°C and the temperature range of a heat treatment zone is 190-240°C. The manufacturing method can provide a biaxially stretching polyester film having uniform transverse physical properties since a bowing phenomenon is inhibited by optimizing the temperature of a stretching zone within a tenter and a heat treatment zone in a simultaneous stretching process, and the draw ratio and relaxation rate of a stretching process.
The present invention relates to a wavy monowire for cutting, which is for the purpose of cutting hard materials, such as hard glass, semiconductors, and hard metals. The present invention is configured to have improved abrasive material retention performance and thus can improve cutting workability and the quality of cut surfaces.
B28D 5/00 - Fine working of gems, jewels, crystals, e.g. of semiconductor materialApparatus therefor
B23D 61/18 - Sawing tools of special type, e.g. wire saw strands, saw blades or saw wire equipped with diamonds or other abrasive particles in selected individual positions
B23D 57/00 - Sawing machines or sawing devices not covered by one of groups
C03B 33/10 - Glass-cutting tools, e.g. scoring tools
The present invention relates to a wavy monowire for cutting, which is for the purpose of cutting hard materials, such as hard glass, semiconductors, and hard metals, and has an improved abrasion level. The present invention is configured to have an improved abrasion level and improved abrasive material retention performance and thus can improve cutting workability and the quality of cut surfaces.
H01L 21/78 - Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices
B23D 61/18 - Sawing tools of special type, e.g. wire saw strands, saw blades or saw wire equipped with diamonds or other abrasive particles in selected individual positions
B28D 5/00 - Fine working of gems, jewels, crystals, e.g. of semiconductor materialApparatus therefor
H01L 23/00 - Details of semiconductor or other solid state devices
39.
POLYURETHANE-UREA ELASTIC YARN WITH EXCELLENT SELF-FUSION BONDING STRENGTH, AND METHOD FOR PRODUCING SAME
The present invention relates to a polyurethane-urea elastic yarn with excellent self-fusion bonding strength, and a method for producing the same and, more particularly, to a polyurethane-urea elastic yarn with excellent self-fusion bonding strength, and a method for producing the same, characterized in that NCO% is 2.20 to 5.50% upon polymerization of a polyol and a diisocyanate, 100% of ethylene glycol is used as a chain extender, and methanol is used as a chain terminator.
D01F 6/70 - Monocomponent man-made filaments or the like of synthetic polymersManufacture thereof from homopolycondensation products from polyurethanes
The present invention relates to a method for winding elastic fiber and elastic fiber produced by using the same. More specifically, the present invention relates to a method for winding elastic fiber and elastic fiber produced by using the same, the method being characterized by installing two or more oil supply devices inside a winding device so as to apply different types and amounts of oil for the respective layers of yarn, instead of applying one type of oil in the same amount to the entire yarn.
The present invention relates to a method for preparing spandex having improved unwinding properties and enhanced adhesive properties with a hot melt adhesive and, more specifically, to a method for preparing spandex by means of adding a polystyrene polymer to a polyurethane-urea solution which is a spinning solution. Therefore, when spandex is unwound, irregular ballooning, tension spikes and the like can be effectively improved and other physical properties are unaffected. And the adhesive properties with a hot melt adhesive are enhanced.
D01F 6/70 - Monocomponent man-made filaments or the like of synthetic polymersManufacture thereof from homopolycondensation products from polyurethanes
The present invention relates to a method for preparing spandex having improved unwinding properties and enhanced adhesive properties with a hot melt adhesive and, more specifically, to a method for preparing spandex by means of adding a polystyrene polymer to a polyurethane-urea solution which is a spinning solution. Therefore, when spandex is unwound, irregular ballooning, tension spikes and the like can be effectively improved and other physical properties are unaffected. And the adhesive properties with a hot melt adhesive are enhanced.
D01F 6/70 - Monocomponent man-made filaments or the like of synthetic polymersManufacture thereof from homopolycondensation products from polyurethanes
The present invention relates to a polyester fiber treated with an eco-friendly secondary treatment liquid, the polyester fiber containing an epoxidized phenolic resin, a maleic anhydride-polybutadiene copolymer, and vinylpyridine latex and styrene-butadiene latex, to a preparation method therefor, and to a tire cord, whereby a high-functional tire cord that can prevent a delamination phenomenon between rubber and fiber, which occurs at the time of high-speed driving of tire, can be prepared by improving the adhesive force, heat resistance, and fatigue resistance of the tire cord.
D06M 15/41 - Phenol-aldehyde or phenol-ketone resins
D06M 15/693 - Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials with macromolecular compoundsSuch treatment combined with mechanical treatment with natural or synthetic rubber, or derivatives thereof
The present invention relates to a polymer solution for manufacturing an acetylated alkyl cellulose separation membrane by using a heat-induced phase separation method, and a method for manufacturing an acetylated alkyl cellulose separation membrane, the polymer solution comprising an acetylated alkyl cellulose polymer and a compound having an ester group. The separation membrane manufactured by the present invention provides the advantage of excellent water permeability and durability.
C08J 3/09 - Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in organic liquids
The present invention relates to an apparatus and method for controlling a circuit breaker for a static synchronous compensator (STATCOM) such that the circuit breaker installed in a branch line for the STATCOM is operated according to the current control characteristics of the STATCOM. An apparatus for controlling a circuit breaker for a STATCOM according to an embodiment of the present invention is an apparatus for controlling a circuit breaker for a STATCOM, installed in a STATCOM-dedicated branch line branched from a main bus of a power system, the apparatus comprising: a transformer protector for detecting the differential current between primary current and secondary current of a transformer connected in series to the circuit breaker in the branch line, and controlling the opening/closing of the circuit breaker; and a STATCOM controller for controlling an operation of the STATCOM, wherein the STATCOM controller outputs, to the transformer protector, an opening suspension signal for suspending the opening of the circuit breaker when overvoltage occurring in the STATCOM is detected, and the transformer protector suspends output of a circuit breaker opening signal to the circuit breaker according to the received opening suspension signal.
H02H 7/04 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers
H02J 3/18 - Arrangements for adjusting, eliminating or compensating reactive power in networks
G05F 1/70 - Regulating power factorRegulating reactive current or power
46.
OPERATION CONTROL DEVICE AND CONTROL METHOD OF SUBMODULE OF MODULAR MULTI-LEVEL CONVERTER
The present invention provides an operation control device and a control method of a submodule of a modular multi-level converter (MMC) for checking the temperature of the submodule during operation of the MMC converter and inputting the submodule into the operation or replacing the same. The operation control device of a submodule of a modular multi-level converter (MMC), according to the present invention, comprises: a plurality of thermal imaging cameras for photographing thermal images of a plurality of submodules participating in operation and a plurality of spare submodules on standby; a temperature extraction unit for extracting the temperature of each submodule from the photographed thermal images; an order determination unit for determining a replacement order to be replaced among the submodules participating in the operation of the MMC converter according to the extracted temperature information of each submodule and a participation order to participate in the operation among the spare submodules; and a control unit for controlling the MMC converter to perform the operation by replacing and inputting the submodules according to the replacement order of the submodules participating in the operation and the participation order of the spare submodules.
The present invention relates to a method for controlling such that, in an MMC for HVDC, each submodule of an unbroken down converter arm operates while lowering output voltage, so as to continuously operate a system, when a submodule of the MMC has broken down in a state in which a redundancy module for improving an operation rate is applied and there are no more redundancy modules to be applied. In the MMC for HVDC, including the plurality of converter arms, wherein each converter arm includes the plurality of operating submodules and preparatory redundancy modules, a redundancy control method of an MMC for HVDC, according to the present invention, comprises the steps of: checking whether a break down has occurred in operating submodules of a first converter arm in a state in which all the redundancy modules of the first converter arm among a plurality of converter arms are applied to the operation; and controlling such that an output voltage of each submodule of other converter arms is lowered so as to make DC link voltages of the other converter arms the same as a DC link voltage of the first converter arm, when a breakdown of the submodules of the first converter arm occurs.
The present invention provides: a modular multilevel converter (MMC) capable of blocking a DC failure and reducing loss by mixedly using a half-bridge sub-module and a full-bridge sub-module in a converter arm of the MMC; and a DC failure blocking method therefor. The MMC according to the present invention comprises a plurality of converter arms, each converter arm comprising: N (N≥2, integer) number of sub-modules connected in series to each other; and a circuit opening unit connected in series to the N number of sub-modules so as to open a circuit of the converter arm, wherein the N number of sub-modules comprise n (n
H02H 7/125 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for convertersEmergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for rectifiers for static converters or rectifiers for rectifiers
H02H 7/12 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for convertersEmergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for rectifiers for static converters or rectifiers
H02M 7/49 - Combination of the output voltage waveforms of a plurality of converters
The present invention relates to a transformer having a noise reducing means. The present invention comprises: an iron core (P), which is formed by stacking a plurality of steel sheets, and has stepped parts (S) formed at a portion thereof with different widths; and the noise reducing means provided at the stepped parts (S) so as to increase coupling force among the plurality of steel sheets. The noise reducing means comprises: pressing bars (30) mounted on the stepped parts (S) of the iron core (P), and having plane-shaped horizontal pressing surfaces (31) in the direction in which the steel sheets are stacked; and a binding (90) for surrounding the outer surface of the iron core (P) including the pressing bars (30), so as to press the pressing bars (30) in the stacking direction of the steel sheets. In the present invention, the plane-shaped pressing surfaces are formed on the pressing bars (30) of the noise reducing means in the stacking direction of the iron core (P) such that the iron core (P) is stably pressed over a wide area. Therefore, the pressing force between the steel sheets constituting the iron core (P) is increased and an air gap is reduced such that the vibration of the iron core (P) and the noise caused by the vibration are reduced.
The present invention relates to an NPC conversion device for converting alternating current power to direct current power, the NPC conversion device comprising: a first switch; a second switch; a third switch; a fourth switch, the first to fourth switches being connected in series; and a conversion control unit for performing control such that, during a forward alternating current conversion period, the first switch and the third switch are alternately switched in the opposite directions in order to generate step-by-step potential and the second switch connects the first switch and the third switch, and during a reverse alternating current conversion period, the second switch and the fourth switch are alternately switched in the opposite directions in order to generate step-by-step potential and the third switch connects the second switch and the fourth switch.
A heat dissipation apparatus of the present invention comprises: an intermediate structure having first and second flow passage grooves formed on the upper surface thereof so as to be parallel to each other, and third and fourth flow passage grooves formed on the lower surface thereof so as to be parallel to each other, wherein the third and fourth flow passage grooves are parallel to the first and second flow passage grooves; an upper plate brought into close contact with the upper surface of the intermediate structure, wherein the upper plate covers the open side of the first flow passage groove to form a first flow passage and covers the open side of the second flow passage groove to form a second flow passage; a lower plate brought into close contact with the lower surface of the intermediate structure, wherein the lower plate covers the open side of the third flow passage groove to form a third flow passage and covers the open side of the fourth flow passage groove to form a fourth flow passage; and a pumping means that inputs a cooling fluid to the first to fourth flow passages at the same time.
H05K 7/20 - Modifications to facilitate cooling, ventilating, or heating
H01L 23/473 - Arrangements for cooling, heating, ventilating or temperature compensation involving the transfer of heat by flowing fluids by flowing liquids
F28F 13/02 - Arrangements for modifying heat transfer, e.g. increasing, decreasing by influencing fluid boundary
52.
METHOD AND DEVICE FOR CONTROLLING OPENING/CLOSING OF CIRCUIT BREAKER
A method for controlling the opening/closing of a circuit breaker of the present invention includes: a signal inputting step for receiving an input of a signal; a sign change detecting step for detecting a sign change of the signal; a zero crossing reference setting step for setting a zero crossing reference when there is the sign change; a one period integrated value comparing step for checking whether an absolute value of a one period integrated value obtained by integrating the signal for one period from the zero crossing reference exceeds a reference value; a detected phase comparing step for determining whether a detected phase is identical to a set phase; and a circuit breaker opening/closing step for controlling the opening/closing of a circuit breaker when the absolute value of the one period integrated value does not exceed the reference value and the detected phase is identical to the set phase.
H01H 9/54 - Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
H01H 33/59 - Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the AC cycle
H02H 3/00 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection
53.
BATTERY MANAGING DEVICE AND BATTERY ENERGY STORING SYSTEM
A battery managing device of the present invention relates to a battery managing device that stores surplus power provided from a system via a power managing device, and controls the charging and discharging of a battery formed of multiple battery modules which supply stored power to the system. The battery managing device comprises: a switch block that connects the multiple battery modules to the power managing device; a charging circuit that charges the battery by means of the power input from the power managing device; a smoothing circuit that discharges or charges the battery according to the real-time power deficit/surplus state of the system; and a control circuit that controls the operation of the switching block, the charging circuit, and the smoothing circuit.
A method for estimating battery life according to one aspect of the present invention comprises the steps of: fully charging a battery according to a predetermined charge condition; partially discharging the fully charged battery according to a predetermined discharge condition; obtaining voltage information (voltage drop) at a plurality of predetermined measurement points while partially discharging the battery; and calculating the remaining capacity of the battery by using the obtained voltage information. The step for calculating the remaining capacity of the battery may comprise the steps of: calculating the capacity of the battery during a one-time full charging and discharging cycle in which measurement is made, from the measured voltage drops; and estimating the remaining battery life by applying the calculated capacity of the battery during a plurality of times of full charging and discharging cycles to a statistical technique.
G01R 31/36 - Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
G01R 19/165 - Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
H01M 10/48 - Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
H01M 10/42 - Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
The present invention relates to a core for a transformer or a reactor. The core according to the present invention comprises: a first leg (10), a second leg (12), and a third leg (14), which are made of widthwise rolled steel plates (11); a first yoke (16) for connecting one end of the legs (10, 12, 14) so as for a magnetic flux to pass therethrough; and a second yoke (18) for connecting the other end of the legs (10, 12, 14) so as for a magnetic flux to pass therethrough. The first yoke (16) and the second yoke (18) are made using lengthwise rolled steel plates (17). The first leg (10) has a first coil (10’) wound therearound, and the second leg (12) has a second coil (12’) wound therearound, and the third leg (14) has a third coil (14’) wound therearound. As such, the present invention can relatively increase an overall magnetic reluctance value and thus has the advantage of preventing the occurrence of magnetic saturation.
The present invention provides a dual control apparatus and a control method for a high voltage direct current (HVDC) system, wherein two controllers share error values of integral controllers in the dual control apparatus for a HVDC system, so as to prevent the occurrence of an error between control values of the two controllers. The dual control apparatus for a HVDC system according to the present invention comprises a first controller and a second controller that are operated as a dual controller, the first controller and the second controller each comprising: a deviation calculation unit for calculating a deviation between a target value and a control value; a PI controller for performing proportional control and integral control of the deviation; a first buffer for storing an error value for the integral control by the PI controller of the first or second controller; and a second buffer for storing an error value for the integral control by the PI controller of the second or first controller, wherein the PI controller of the first controller performs the proportional control and the integral control of the deviation using the error value stored in the first buffer of the first controller, and the PI controller of the second controller performs the proportional control and the integral control of the deviation using the error value stored in the second buffer of the second controller.
The present invention relates to a multilevel modular converter (MMC) applied to a static synchronous compensator (STATCOM) and, more particularly, to a redundancy control method of an MMC for a STATCOM, for continuously operating the MMC when an operating submodule breaks down in a state in which there is no more redundancy submodule to be applied, during an operation of the MMC. According to the present invention, a redundancy control method of an MMC, for a STATCOM, linked to the STATCOM and having a plurality of phases, wherein each phase includes a plurality of operating submodules and redundancy submodules, comprises the steps of: checking whether a breakdown has occurred in operating submodules of a first phase when all the redundancy submodules of the first phase, among the plurality of phases, are applied to the operation; and controlling such that an output voltage of each submodule of the first phase is raised so as to make the output voltage of the first phase the same as output voltages of other phases, when a breakdown of the submodules of the first phase occurs.
The present invention is to provide a method for manufacturing a transparent ceramic phosphor plate, which is not only simple, but can also improve product yield. The solution of the present invention comprises the steps of: pulverizing a YAG phosphor to be smaller than or equal to 1 µm by milling; drying the pulverized YAG phosphor in an oven; pressurizing the dried pulverized YAG phosphor to mold the same into a plate; and firing and post-treating the molded plate.
The present invention relates to an actuator for a high-speed switch. The frame of the present invention is formed by a frame (110), and the frame (110) consists of multiple mounting plates (112) and columns (114). The mounting plates (112) have parts installed thereon or movably supported thereby. The columns (114) maintain the space between the mounting plates (112). A driving unit (116) is installed so as to pass through a part of the mounting plates (112), and the driving unit (116) is provided with a first driving plate (122) and a second driving plate (124) on a driving shaft (118). A first coil unit (126) is provided on the mounting plate (112) so as to face the first driving plate (122) and generates the movement of the first driving plate (122) at the time of an opening operation. A permanent magnet (128) is installed on one of the mounting plates (112) so as to face the second driving plate (124), and an elastic member (132) is installed on the mounting plate (112) that faces the mounting plate (112) having the permanent magnet (128) installed thereon, so as to provide force for the movement of the second driving plate (124). The permanent magnet (128) also allows the driving unit (116) to perform a making operation and maintain a making state. Further, the permanent magnet (128) and the elastic member (132) are jointly in charge of the force for keeping the driving unit (116) in the making state; thus, if the driving unit (116) deviates from the influential area of the permanent magnet (128) when the opening operation occurs, the opening operation is quickly carried out.
H01H 73/36 - Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electromagnetic release and no other automatic release
The present invention relates to an isolated bidirectional DC-DC converter for enabling highly efficient control by mixedly using different switching schemes according to the type of load in a bidirectional DC-DC converter applied between a DC grid system and a battery. The isolated bidirectional DC-DC converter according to the present invention controls switching of a first switching unit and a second switching unit so as to control the flow of power by changing a bidirectional DC-DC voltage between the DC grid system and the battery, wherein PSM switching control and SPWM switching control are mixedly used according to charge amounts charged to the battery, thereby enabling the efficiency of a system to be improved.
H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
H02M 1/44 - Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
H02M 1/08 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
The present invention relates to a power supply control method and system capable of efficiently adjusting charging and discharging of an energy storage system (ESS) on the basis of an actual measurement value of a load and an actual measurement value of power generation. The power supply control system of the present invention comprises: a power generation value actual measurement unit for actually measuring a power generation value; a power generation value prediction unit for predicting the power generation value; a load value actual measurement unit for actually measuring a load value; a load value prediction unit for predicting the load value; a correction value calculation unit for correcting at least any one of a peak cut value, a load leveling value, a predictive power generation value, and a predictive load value on the basis of at least any one of a difference value between the power generation value actual measurement unit and the power generation value prediction unit and a difference value between the load value actual measurement unit and the load value prediction unit; and an ESS charging and discharging output control unit for controlling an ESS charging and discharging output by applying the correction value calculated by the correction value calculation unit.
The purpose of the present invention is to optimize the conductor bar shape of a rotor, thereby improving the efficiency of an induction motor. Particularly, the present invention relates to an induction motor rotor structure having rotor conductor bars configured in predetermined double squirrel-cage shapes such that the same is driven with a high output at a lower voltage. The induction motor rotor structure according to the present invention comprises: first conductor bars having double squirrel-cage shapes; and second conductor bars having overall shapes of elongated quadrangular bars, wherein the first conductor bars are arranged on the rotor such that the number of the first conductor bars corresponds to at least three times the number of the second conductor bars.
H02K 17/18 - Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors having double-cage or multiple-cage rotors
H02K 1/22 - Rotating parts of the magnetic circuit
63.
GAS INSULATED SWITCHGEAR PARTIAL DISCHARGE DIAGNOSIS METHOD AND DEVICE
The present invention relates to a gas insulated switchgear partial discharge diagnosis method and device for determining the cause of a partial discharge defect of a gas insulated switchgear by analyzing frequency and phase characteristics of a partial discharge signal. The gas insulated switchgear partial discharge diagnosis method according to the present invention comprises: a partial discharge signal detection step of detecting a partial discharge signal; a partial discharge signal analysis step of analyzing a predetermined frequency and/or phase characteristics of the partial discharge signal without phase synchronization with a phase voltage; and a partial discharge defect cause diagnosis step of diagnosing the cause of a defect of a partial discharge on the basis of the frequency and phase characteristics of the partial discharge signal, which has been analyzed in the partial discharge signal analysis step.
A method for diagnosing an oil-immersed transformer, of the present invention, comprises: a dissolved gas measurement step of measuring dissolved gas in the oil-immersed transformer by a dissolved gas measurement part; a dissolved gas analysis step of analyzing the amount of the dissolved gas measured in the dissolved gas measurement step; a stray gassing determination condition confirming step of determining whether stray gassing is included, on the basis of the result of analyzing the amount of the dissolved gas; a first dissolved gas determination step of diagnosing an internal defect of the transformer if the stray gassing is not included; and a second dissolved gas determination step of determining the stray gassing and diagnosing the internal defect of the oil-immersed transformer if the stray gassing is included.
G01R 31/02 - Testing of electric apparatus, lines, or components for short-circuits, discontinuities, leakage, or incorrect line connection
G01R 21/12 - Arrangements for measuring electric power or power factor by using square-law characteristics of circuit elements, e.g. diodes, to measure power absorbed by loads of known impedance in circuits having distributed constants
G01N 33/00 - Investigating or analysing materials by specific methods not covered by groups
The present invention relates to a shorting device for facilitating the grounding of a converter to which a plurality of sub modules are connected in series. The present invention comprises: a moving rod (40) provided on a main frame (10) on which the plurality of sub modules (S) are provided, and moving in the direction traversing the plurality of sub modules (S); and a plurality of contactors (50) provided at the moving rod (40) along the longitudinal direction so as to be electrically connected to each sub module outer casing (1) according to the movement of the moving rod (40). In addition, a connection means (C) electrically connects the contactor (50), the sub module outer casing (1) to which the contactor (50) is electrically connected, and another adjacent sub module outer casing (1) so as to enable simultaneous grounding thereof. The present invention simultaneously connects the respective sub module outer casings (1), which forms the converter, through the operation of the shorting device so as to simultaneously and simply ground the plurality of sub modules (S), thereby improving workplace stability, and enables work speed to become faster by reducing the time required to lower the potential of the sub modules (S).
H01R 11/14 - End pieces terminating in an eye, hook, or fork the hook being adapted for hanging on overhead or other suspended lines, e.g. hot line clamp
H01R 4/48 - Clamped connectionsSpring connections using a spring, clip or other resilient member
H02G 1/02 - Methods or apparatus specially adapted for installing, maintaining, repairing, or dismantling electric cables or lines for overhead lines or cables
66.
POLYKETONE SEPARATOR FOR HIGH-TEMPERATURE WATER TREATMENT
The present invention relates to a polymer separator used in an apparatus for treating boiler feed water for the recovery of oil sands and, more specifically, to a polyketone separator that has excellent heat resistance and filtration performance by using polyketone as a separator and thus is applicable to a steam assisted gravity drainage (SAGD) method.
The present invention relates to spandex with improved unwinding properties and without the occurence of scum and a method for producing the same. More specifically, the present invention relates to spandex which is produced by adding polyethylene glycol to a polyurethane urea solution, which is a spinning solution, thereby effectively improving an irregular ballooning phenomenon and a tension spike phenomenon when unwinding spandex, having no adverse effect on other properties such as adhesion properties with hot melt and having unwinding properties without occurrence of scum, and a method for producing the same.
D01F 6/70 - Monocomponent man-made filaments or the like of synthetic polymersManufacture thereof from homopolycondensation products from polyurethanes
A61F 13/15 - Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the bodySupporting or fastening means thereforTampon applicators
68.
CAPACITOR DISCHARGE DEVICE INSIDE SUB MODULE OF MMC CONVERTER
The present invention relates to a capacitor discharge device for quickly and safely discharging energy charged in a capacitor inside a sub module of an MMC converter. The capacitor discharge device according to the present invention comprises: a capacitor for storing direct current (DC) voltage inside a sub module of an MMC converter; a power supply device for supplying a necessary operation power source into the sub module by using the voltage stored in the capacitor; a first resistor connected to the capacitor in parallel; a second resistor having a smaller resistance value and a larger thermal capacity than those of the first resistor, and rapidly discharging the voltage stored in the capacitor; a first switching contact for connecting and blocking the capacitor and the second resistor; a switching unit for operating the switching of the first switching contact by an operation power source supplied from a power supply unit; a second switching contact for connecting and blocking the power supply device and the switching unit; and a control unit for operating the switching of the second switching contact.
H02M 7/493 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode the static converters being arranged for operation in parallel
H02M 1/32 - Means for protecting converters other than by automatic disconnection
69.
POLYURETHANE-UREA ELASTIC FIBER AND METHOD FOR PREPARING SAME
The present invention relates to a polyurea-urethane elastic fiber and a method for preparing the same, and more particularly, to a polyurethane-urea elastic fiber and a method for preparing the same, wherein polytrimethylene ether glycol is used as a polyol component during polyurethane prepolymerization and 0.5 to 40.0 mol% of polypropylene diamine is mixed and used as an auxiliary chain extender during polyurethane urea preparation. In the present invention, the intrinsic viscosity of the fiber is at least 1.10, and thus rubber-like properties and permanent strain are improved to be excellent, and elasticity and elastic recovery are superb.
D01F 6/70 - Monocomponent man-made filaments or the like of synthetic polymersManufacture thereof from homopolycondensation products from polyurethanes
The present invention relates to a polyurethane or polyurethane urea elastic yarn having improved dyeability and to a preparing method therefor. Here, 0.1-20 wt% of at least one kind of material having an alkaline earth metal element with an electronegativity (Pauling scale) of 1.2 or more, a metalloid element with an electronegativity (Pauling scale) of 1.8 or more, or a post-transition metal element with an electronegativity (Pauling scale) of 1.5 or more is added to a polyurethane or polyurethane urea elastic yarn, and thus, not only can the dyeability of the polyurethane or polyurethane urea elastic yarn in a reactive dye be improved through covalent bonding with the reactive dye, but an advantage of increasing the dyeing color depth in a fabric, in which cotton and the polyurethane or polyurethane urea elastic yarn are knitted together, can also be anticipated.
D01F 6/70 - Monocomponent man-made filaments or the like of synthetic polymersManufacture thereof from homopolycondensation products from polyurethanes
The present invention relates to an oxynitride phosphor, a preparing method therefor, and a white light emitting element, and more specifically, to an oxynitride phosphor characterized by the emission at an emission wavelength of even 500-550 nm using a UV LED and a blue LED as light sources and having a narrow full width at half maximum of 48-80 nm, wherein the oxynitride phosphor has an excellent absorption range of 380-480 nm and facilitates the wavelength shift to even 500-550 nm, to a preparing method therefor, and to a white light emitting element containing the phosphor.
H05B 33/14 - Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of the electroluminescent material
72.
COLLECTOR OF ELECTROLYZER FOR MANUFACTURING NITROGEN TRIFLUORIDE AND METHOD FOR MANUFACTURING SAME
FOOSUNG PRECISION INDUSTRY CO.LTD. (Republic of Korea)
HYOSUNG CORPORATION (Republic of Korea)
Inventor
Won, Ji Yeon
Kwon, Cheol Hyun
Abstract
A collector of an electrolyzer for manufacturing NF3 according to the present embodiment comprises: a side portion, which surrounds the periphery of a predetermined number of anode electrodes, and which has the shape of a quadrangular tube; a flange formed to extend vertically with regard to the upper end of the side portion; and a reinforcement ring, which is arranged on the lower-end side of the side portion, which is formed to surround the side portion up to a preset height, and which has the shape of a plate-shaped ring, wherein the side portion has a reinforcement ring coupling portion formed thereon so as to protrude inwards and to be as thick as a size, which corresponds to the thickness of the reinforcement ring, from the lower end thereof to a height that corresponds to the height of the reinforcement ring.
C25B 9/00 - Cells or assemblies of cellsConstructional parts of cellsAssemblies of constructional parts, e.g. electrode-diaphragm assembliesProcess-related cell features
The present invention provides a DC circuit breaker capable of bidirectionally breaking a fault current that flows in a DC line when a fault occurs in the DC line. This DC circuit breaker comprises: a first mechanical switch having a first DC line connected to one side thereof and a first conductive connecting member connected to the other side thereof; a second mechanical switch having the first conductive connecting member connected to one side thereof and a second DC line connected to the other side thereof; a first diode connected in parallel to the first mechanical switch on a first branching line branched from the first DC line; a second diode connected in series to the first diode through the second conductive connecting member and connected in parallel to the second mechanical switch on a second branching line branched from the second DC line; and a semiconductor switching circuit installed on a line connected between the first conductive connecting member and the second conductive connecting member, and switching the flow of a fault current when a fault occurs.
H01H 9/54 - Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
H01H 9/30 - Means for extinguishing or preventing arc between current-carrying parts
H01H 33/59 - Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the AC cycle
74.
POLYURETHANE-UREA ELASTIC FIBER WITH EXCELLENT POWER AND EVENNESS AND METHOD FOR MANUFACTURING SAME
The present invention relates to a polyurethane-elastic fiber with excellent power and evenness and a method for manufacturing the same and, more specifically, to a polyurethane-urea elastic fiber with excellent power and evenness and a method for manufacturing the same, wherein when a polyol and diisocyanate are polymerized, the NCO% is 2.60-3.00%, and 100% of ethylene diamine as a chain extender is used, and here, the turbidity of the polyurethane-urea prepolymer is maintained at 1.0 NTU or less immediately after the reaction of a polyurethane-prepolymer, a chain extender, and a chain exterminator.
D01F 6/70 - Monocomponent man-made filaments or the like of synthetic polymersManufacture thereof from homopolycondensation products from polyurethanes
The present invention relates to a polyurethaneurea elastic yarn with excellent disentanglement and a method for producing the same and, more specifically, to a polyurethaneurea elastic yarn with excellent unwinding property having a peanut-type cross-section and a method for producing the same, wherein NCO% is 2.60 to 3.00% at the polymerization of polyol and diisocyanate; and the average value of cross-section heterogeneity of the elastic yarn is 2.0 to 3.5 and the standard deviation thereof is 0.01 to 1.0 as a result of using 100% of ethylenediamine as a chain extender.
D01F 6/70 - Monocomponent man-made filaments or the like of synthetic polymersManufacture thereof from homopolycondensation products from polyurethanes
The present invention provides a spandex fiber with improved strength and excellent chlorine resistance, comprising a dialkyl sulfosuccinate corresponding to the following formula (1), where R1 and R2 are independent of each other, are the same or different, and are hydrogen or an alkyl group with 1 to 30 carbon atoms; and M+ represents a cation based on H+, Li+, Na+, K+ or NH4+.
D01F 6/70 - Monocomponent man-made filaments or the like of synthetic polymersManufacture thereof from homopolycondensation products from polyurethanes
D01D 1/10 - Filtering or de-aerating the spinning solution or melt
The present invention relates to a power supply apparatus for a sub-module of a Modular Multilevel Converter (MMC) that stably supplies power to a sub-module of the MMC connected to a high-voltage direct current (HVDC) system. The power supply apparatus for a sub-module of an MMC according to the present invention, in a power supply apparatus for providing power to a sub module of an MMC, comprises: a relay unit that is installed between P-N bus bars of the MMC and that includes a Form B contact switch; a resistor that is connected to the relay unit in series; a TVS diode that is connected to the resistor in series; a Zener diode that is connected to the TVS diode in series; a transformer for transmitting the input voltage of the P-N bus bars (primary) to secondary voltage; a semi-conductor switch for switching a flow of current that is supplied to the transformer; a control unit for turning on the semi-conductor switch such that current flows to the transformer if a clamping voltage of the Zener diode is input; a relay operation unit for receiving a secondary output voltage of the transformer, and for operating the Form B contact switch of the relay unit; and a circuit interruption unit that is connected to the relay unit in series and that interrupts a circuit if current flowing through the Form B contact switch of the relay unit is larger than a preset reference current, or if heat is generated due to the current.
H02M 1/084 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters using a control circuit common to several phases of a multi-phase system
H02M 7/12 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
The present invention relates to a DC breaker that can break a fault current generated in a direct current line, using a unidirectional semiconductor switch device. The DC breaker comprises: a mechanical switch that is connected between a first direct current line and a second direct current line; a first unidirectional semiconductor switch device that is connected with the second direct current line in parallel with the mechanical switch, and transfers a current to the first direct current line into which a steady state current flows through the second direct current line when a fault current is generated, so that a current of the first direct current line becomes zero; an LC resonant circuit that is connected between the first unidirectional semiconductor switch device and an earth in series, is charged by receiving a steady state current of the first direct current line, and generates a resonant current to the first unidirectional semiconductor switch device when the fault current is generated; and a second unidirectional semiconductor switch device that is connected in parallel with each of the first unidirectional semiconductor switch device and the LC resonant circuit, and enables a capacitor of the LC resonant circuit to be charged with a steady state current of the first direct current line.
H01H 33/59 - Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the AC cycle
H01H 33/02 - High-tension or heavy-current switches with arc-extinguishing or arc-preventing means Details
H01H 33/14 - Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc
79.
LARGE CAPACITY BATTERY SYSTEM FOR POWER SYSTEM FREQUENCY REGULATION AND LARGE CAPACITY BATTERY OPERATION METHOD
The present invention relates to a large capacity battery system for managing a large capacity battery used for power system frequency regulation and a large capacity battery operation method. A method for operating a large capacity battery used for power system frequency regulation in a large capacity battery system for managing the large capacity battery according to the present invention comprises the steps of: calculating an estimated frequency regulation signal for the next day using history information of past frequency regulation signals; calculating a bidding capacity and a basic value for the large capacity battery, matched to the estimated frequency regulation signal; determining an operation plan using the calculated bidding capacity and basic value; bidding the bidding capacity and basic value for the large capacity battery according to the operation plan on the day-ahead frequency regulation market; and when the bidding of the bidding capacity and basic value for the large capacity battery has been successful on the day-ahead frequency regulation market, receiving a frequency regulation signal from the real-time frequency regulation market and storing the same, and operating the large capacity battery according to the received frequency regulation signal.
The present invention relates to a capacitor bushing and a manufacturing method therefor. The capacitor bushing of the present invention comprises: insulation layers (20) formed by winding insulation fibers (22) around the outer surface of a central conductor (10); and conductive layers (30) formed by interposing conductive fibers (32) between the insulation layers (20). The wefts (34) and warps (36) that constitute the conductive fibers (32) are made by sequentially forming a first coating layer (38) and a second coating layer (38') on the surface of a core wire (37). The wefts (24) (34) and warps (26) (36) of the insulation fibers (22) and the conductive fibers (32) extend so as to be inclined with respect to the longitudinal direction of the central conductor (10). The wefts (24) (34) and warps (26) (36) form a polygonal or circular shape. Filling layers (40) are formed by placing the central conductor (10) with the insulation layers (20) and the conductive layers (30) on the outer surface thereof in a mold, and an epoxy resin is injected into the mold to form the filling layers (40) while the mold is under vacuum. In the process of curing the filling layers (40), heating is conducted while air pressure is applied to the inside of the mold. As described above, according to the present invention, it is possible to prevent bubbles or pores from being generated in the filling layers (40).
The purpose of the present invention is to provide: polyketone fibers having excellent strength and water resistance, which are manufactured from a polyketone solution prepared from a copolymer of carbon monoxide, ethylene, and propylene; and a manufacturing method therefor. The industrial polyketone fibers manufactured according to the present invention have excellent strength, elongation, water resistance, heat resistance, and thermal conductivity, and thus are suitable for the use in marine ropes, hoses, protective products, Geotextile, fibers for enhancing FRP composite materials, cables, fishing nets, air bags, heat insulators, seat belts, safety nets, roung sling, flying-quality film materials, non-woven fabrics, spun bonds, conveyor belts, flexible containers, fishing lines, sports cords, carbon fiber composite materials, longlines, carpets.
D01F 6/76 - Monocomponent man-made filaments or the like of synthetic polymersManufacture thereof from homopolycondensation products from other polycondensation products
B66C 1/12 - Slings comprising chains, wires, ropes, or bandsNets
The purpose of the present invention is to provide polyketone fibers having excellent strength and water resistance, which are manufactured from a polyketone solution prepared from a copolymer of carbon monoxide, ethylene, and propylene, and a manufacturing method therefor. The industrial polyketone fibers manufactured according to the present invention have excellent strength, elongation, water resistance, heat resistance, and thermal conductivity, and thus are suitable for the use for marine ropes, hoses, protective products, Geotextile, fibers for enhancing FRP composite materials, cables, fishing nets, air bags, heat insulators, seat belts, safety nets, roung sling, flying film materials, non-woven fabrics, spun bonds, conveyor belts, flexible containers, fishing lines, sports cords, carbon fiber composite materials, longlines, carpets.
D01F 6/76 - Monocomponent man-made filaments or the like of synthetic polymersManufacture thereof from homopolycondensation products from other polycondensation products
The present invention relates to a highly thermally conductive composite material and, more specifically, to a highly thermally conductive composite material comprising a base filler, a nanocarbon-based filler, and a polymeric resin.
The present invention relates to a high voltage direct current (DC) circuit breaker in which a vacuum interrupter part and a gas circuit breaker part are connected in series such that the fault current flowing in a high voltage DC line is broken. The DC circuit breaker according to the present invention comprises: the vacuum interrupter part provided at the DC line, and operating when an error occurs at one side or the other side of the DC line, so as to break the current in the DC line; the gas circuit breaker part connected in series to one side of the vacuum interrupter part; an LC circuit connected in parallel to the vacuum interrupter part (110) and including a capacitor and a reactor, which are connected in series, for generating LC resonance; a first bidirectional switching element connected in series to the LC circuit so as to switch a bidirectional current flow; and a second bidirectional switching element connected in parallel to the LC circuit, and switching a current flow so as to form the bidirectional LC resonance.
H01H 33/59 - Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the AC cycle
The present invention relates to a DC circuit breaker that, when failure occurs on a direct current (DC) line, can interrupt, bidirectionally from a mechanical switch, the fault current flowing on the DC line. The DC circuit breaker, according to the present invention, comprises: a first mechanical switch for interrupting a current on a DC line; a first diode connected in parallel to the first mechanical switch; a second mechanical switch connected in series to the first mechanical switch for interrupting the current on the DC line; a second diode connected in parallel to the second mechanical switch; an LC circuit connected in parallel to the first and second mechanical switches and comprising a capacitor and reactor connected in series for generating an LC resonance; a first unidirectional switching element connected in parallel to the LC circuit for switching the current flow so as to generate the LC resonance; and a bidirectional switching element connected in series to the LC circuit for switching the bidirectional current flow.
H02H 3/087 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to excess current for DC applications
86.
POWER CONTROL APPARATUS FOR SUB-MODULE OF MMC CONVERTER
The present invention relates to a power control apparatus for a sub-module, which controls power supply to a sub-module of an MMC converter connected with an HVDC system and a STATCOM. The power control apparatus of the present invention comprises: a half bridge circuit unit for converting and outputting an input voltage of a P-N busbar of an MMC converter as a low voltage which is relatively low; a transformer for transferring the output voltage (primary side) of the low voltage outputted by the half bridge circuit unit to a secondary side; a DC/DC converter for converting the output voltage at a secondary side of the transformer; a photo coupler for outputting a reference signal corresponding to the size of the output voltage at the secondary side of the transformer; a PWM control unit for controlling switching of the switch within the half bridge circuit unit according to the reference signal of the photo coupler; and a start-up circuit unit for supplying an initial start-up voltage to the PWM control unit, wherein the PWM control unit is initially started by a start-up voltage supplied from the start-up circuit unit, controls switching of the switch according to the reference voltage received from the photo coupler, and is operated by receiving, as an operation voltage, an input of the output voltage outputted to the secondary side of the transformer according to the switching.
H02M 7/19 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only arranged for operation in series, e.g. for voltage multiplication
H02J 1/00 - Circuit arrangements for dc mains or dc distribution networks
The present invention relates to a power supply apparatus for a sub-module of a Modular Multilevel Converter (MMC) that stably supplies power to a sub-module of the MMC connected to a high-voltage direct current (HVDC) system. The power supply apparatus for a sub-module of an MMC according to the present invention comprises: a charge unit for storing P-N busbar input power of the MMC; a relay unit that is connected to the charge unit in parallel; a resistor that is connected to the relay unit in series; a TVS diode that is connected to the resistor in series; a Zener diode that is connected to the TVS diode in series; a transformer for transmitting the input power (primary) to secondary; a switch for switching a flow of current that is supplied to the transformer; a control unit for receiving a clamping voltage from the Zener diode and turning on the switch such that current flows to the transformer; and a relay operation unit for operating the relay unit when a secondary output voltage of the transformer is input.
H02M 7/19 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only arranged for operation in series, e.g. for voltage multiplication
H02J 1/00 - Circuit arrangements for dc mains or dc distribution networks
The present invention provides a method for operating a dual controller, which determines whether an error occurs in the dual controller by monitoring the state of the dual controller and enables the dual controller to be normally operated. The method for operating the dual controller according to the present invention calculates variations of dq conversion values by performing the dq conversion of control command output values of first and second controllers, and calculates average variations of the dq conversion values by performing the dq conversion of feedback input values of the first and second controllers. When the average variations of the dq conversion values for the control command output values are respectively the same as the average variations of the dq conversion values for the feedback input values, it is determined that the corresponding controller is in a normal state, with respect to the first and second controllers, and when the average variations of the dq conversion values for the control command output values are respectively different from the average variations of the dq conversion values for the feedback input values, it is determined that the corresponding controller is in an erroneous state with respect to the first and second controllers. According to the determined results, the controller in an erroneous state is set to a standby state and the controller of a normal state is set to an active state.
An electrode device for a gas insulated switchgear is disclosed. An electrode device for a gas insulated switchgear according to an embodiment of the present invention comprises: a first coating layer having a first permittivity, which is coated so as to reduce an electric field with respect to the outer surface layer of a conductor placed in a case; and a second coating layer having a second permittivity relatively lower than the first permittivity, which is formed outside the first coating layer.
The present invention relates to a power control apparatus for a sub-module of a modular multi-level converter (MMC) which is configured to control stable power supply to the sub-module of an MMC, which is associated with a high-voltage DC transmission (HVDC) system and a static synchronous compensator (STATCOM). The power supply control apparatus according to the present invention comprises: at least one first resistor connected between the P-N generating lines of the MMC converter; a second resistor connected in series with the first resistor; a switch connected in series with the second resistor; a third resistor connected in parallel with a series connection of the second resistor and the switch; a Zener diode connected in parallel with the third resistor; and a DC/DC converter, connected to the output terminals of both ends of the Zener diode, which converts voltage at both ends of the Zener diode and transfers the voltage to the sub-module, wherein the magnitude of current flowing through the Zener diode varies in accordance with on/off switching of the switch.
H02M 7/19 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only arranged for operation in series, e.g. for voltage multiplication
H02J 1/00 - Circuit arrangements for dc mains or dc distribution networks
The present invention relates to a rotor formed by stacking a plurality of rotor cores, each having a shaft hole, and to a rotor of a synchronous reluctance electric motor, wherein each rotor core has a plurality of flux barrier groups formed along the circumferential direction of a rotary shaft, each flux barrier group has a plurality of flux barriers formed in the radial direction of the rotary shaft, and the widths of the flux barriers adjacent to the shaft hole are formed to be different from the widths of the flux barriers, which are not adjacent to the shaft hole, among the plurality of flux barriers formed in one flux barrier group, thereby increasing the efficiency of the electric motor, and reducing stress and torque ripple, which are applied to the rotor when the rotor is press-fitted onto the rotary shaft by shrink-fitting.
The present invention relates to a transformer tank having a noise reduction structure. The tank (10) of the present invention constitutes the exterior of a transformer and has a transformer main body installed therein. The outer surface of the tank (10) is formed by a flat wall (14) that is perpendicular to the ground, a first inclined wall (16) that is inclined with respect to the ground in one direction, and a second inclined wall (18) that is inclined with respect to the first inclined wall (16) in the opposite direction, and at least the first inclined wall (16) and the second inclined wall (18) form a flexure section (13). The flexure section (13) strengthens the rigidity of the tank (10) and minimizes the radiation of noise by forming flexure on the outer surface of the tank (10). A plurality of reinforcing columns (20, 20') are mounted on the outer surface of the tank (10), each of which includes a rectilinear section (22), a first inclined section (24), and a second inclined section (26) to correspond to the shape of the flexure section (13). According to the present invention, the rigidity of the transformer tank is strengthened, and the radiation of noise is minimized. In addition, the direction of the noise radiated from the flexure section (13) is adjusted, and noise in a region adjacent to the flexure section (13) is minimized.
The present invention relates to a transformer having a noise reduction structure. A tank (12) forms the exterior of the transformer (10). An inner space (14) filled with insulating oil is formed inside the tank (12). An iron core (20) is provided inside the tank (12) by a lower frame (16) and an upper frame (18), and windings (22) are wound around parts of the iron core (20) extending in the direction of gravity. An insulating sheet (24) is provided to encompass the surface of the winding (22), and has ridge portions (26) and groove portions (28), which are formed to extend in the height direction of the iron core (20). It is preferable that the inner surfaces of the groove portions (28) are formed in parallel so as to face each other. The present invention as above minimizes the transfer of vibrations, generated from the windings (22), to the insulating sheets (24) provided on the surfaces of the windings (22) and removes a part of the vibrations since the vibrations coming out after having passed through the insulating sheets (24) are transferred to the insulating oil so as to cancel each other out. Therefore, the present invention can relatively reduce vibration and noise, which are generated from the transformer.
The present invention relates to a DC circuit breaker that, when failure occurs on a direct current (DC) line, can interrupt, bidirectionally from a mechanical switch, the fault current flowing on the DC line. The DC circuit breaker, according to the present invention, comprises: a mechanical switch installed on a DC line and opened when failure occurs on one side or the other side of the DC line so as to interrupt a current on the DC line; a first bidirectional switching element connected in parallel to the mechanical switch for switching the bidirectional current flow; an LC circuit connected in parallel to the mechanical switch and comprising a capacitor and reactor connected to each other in series for generating an LC resonance; a first unidirectional switching element connected in parallel to the LC circuit for switching the current flow so as to generate the LC resonance; and a second bidirectional switching element connected in series to the LC circuit for switching the bidirectional current flow.
H01H 33/59 - Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the AC cycle
The present invention provides a modular multilevel converter (MMC) additionally including M number of redundant submodules besides N number of submodules necessary for an operation, so as to control N+M number of submodules such that the N+M number of submodules participate in switching while rotating. The MMC according to one embodiment of the present invention comprises: a plurality of submodules connected in series to each other; and a control unit for controlling the ON/OFF switching of the submodules, wherein the plurality of submodules comprise the N number of submodules participating in the operation of the converter and the M number of redundant submodules for participating in the operation instead of the erroneous submodule when an error occurs in at least one of the N number of submodules, and the control unit switches the submodules ON when each carrier signal allocated to the N+M number of number of submodules is greater than a predetermined reference signal, and switches the submodules OFF when each carrier signal allocated to the N+M number of submodules is less than the predetermined reference signal.
H02M 7/19 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only arranged for operation in series, e.g. for voltage multiplication
H02J 1/00 - Circuit arrangements for dc mains or dc distribution networks
96.
POWER SUPPLY DEVICE FOR SUB-MODULE CONTROLLER OF MMC CONVERTER
The present invention relates to a power supply device for a sub-module controller of a modular multilevel converter (MMC) which supplies operating power to a sub-module controller of an MMC connected to a high voltage direct current (HVDC) transmission system. The power supply device according to the present invention comprises: N (N≥2, integer) energy storage units for storing DC voltage in sub-modules of an MMC converter, which are connected in series to each other; a bridge circuit unit including a plurality of power semiconductors which are connected in parallel to the N energy storage units in the form of a bridge; and a DC/DC converter for converting voltage output from output terminals formed at both ends of n (1≤n
H02M 7/19 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only arranged for operation in series, e.g. for voltage multiplication
H02J 1/00 - Circuit arrangements for dc mains or dc distribution networks
The present invention relates to a redundant control system. The redundant control system comprise: a clock generation unit for generating a clock at predetermined periods; a first buffer for storing control data output from a first control unit; a second buffer for storing control data output from a second control unit; first and second state monitors for checking whether there are the control data of the first and second controllers, stored in the first and second buffers respectively, during the period of the same clock among clocks supplied by the clock generation unit; a switching unit which is switched to transmit, to a lower-level module, any one of the control data of the first and second controllers, stored in the first and second buffers; and a control unit for determining whether a failure occurs in the first and second controllers, from the result of checking the existence of the first and second control data, output from the first and second state monitors, and controlling the switching unit as a result of the determination.
The present invention relates to a cover for a motor housing, in a motor comprising: a motor housing having a cooling fin installed on the outer circumferential surface thereof; a cover installed in one side of the motor housing; a rotation shaft installed so as to penetrate through the motor housing and the cover; a bearing installed between the rotation shaft and the cover; and a fan hood having a cooling fan therein and installed in the other side of the motor housing, the cover for a motor housing comprising: a first main body unit having a first hollow hole formed in the central portion thereof; a second main body unit installed in the inner side surface of the first main body unit; and a plurality of cooling flow paths, formed between the first main body unit and the second main body unit, for cooling the bearing by means of air discharged by the cooling fan.
H02K 5/20 - Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
H02K 9/06 - Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
The present invention relates to: a vacuum interrupter for bidirectionally moving two movable electrodes so as to implement a short circuit and a short-circuit release; and a driving method therefor. The vacuum interrupter according to the present invention comprises: a housing in which there is a vacuum state; and first and second movable electrodes partially accommodated within the housing and including first and second movable contacts attached to each end thereof, wherein the first and second movable electrodes can move in both directions, and the first and second movable contacts come into contact with each other and are separated from each other by the bidirectional movement of the first and second electrodes.
Disclosed is a fast switch device including: a reactor that moves to an open position where the switch is opened and a close position where the switch is closed; an open coil portion that drives the reactor to the open position by virtue of an eddy current component; a close coil portion that drives the reactor the close position by virtue of an eddy current component; and a controller that performs control such that an electric current is applied to the close coil portion oppositely to a direction of an electric current flowing through the open coil portion in order to brake the reactor during an open operation for driving the reactor to the open position, and an electric current is applied to the open coil portion oppositely to a direction of an electric current flowing through the close coil portion.
