Abstract

The present invention relates to a permanent magnet rotary machine comprising a rotator to be able to reduce a slot harmonic wave voltage component so that heat generation of the rotary machine can be reduced, and degradation of performance such as a power factor, efficiency, etc. can be minimized. A permanent magnet rotary machine according to an embodiment may comprise: a stator in which a plurality of slots and a plurality of poles are formed, coils being wound on the poles; and a rotator in which a plurality of permanent magnets are embedded and which is disposed while having a clearance from the stator and is rotatable, wherein at least one pair of groove parts are formed on a surface of the rotator to correspond to each single pole, the surface facing the stator with a clearance therebetween, and each of the groove parts has an asymmetric arc-shaped cross section.

IPC Classes  ?

• H02K 29/03 - Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems
• H02K 21/14 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
• H02K 1/276 - Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]

Abstract

A composite self-blasting gas circuit breaker according to the present invention comprises: a fixed arcing contact; a cylinder having a thermal expansion chamber; a movable arcing contact of which at least a portion is disposed inside the cylinder and into which the fixed arcing contact is partially inserted; and a main nozzle coupled to the cylinder, wherein a portion of the main nozzle is positioned inside the thermal expansion chamber, and a communication hole communicating with the thermal expansion chamber can be provided in the portion of the main nozzle positioned inside the thermal expansion chamber.

IPC Classes  ?

• H01H 33/56 - Gas reservoirs
• H01H 33/58 - Silencers for suppressing noise of switch operation
• H01H 33/72 - Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid having stationary parts for directing the flow of arc-extinguishing fluid, e.g. arc-extinguishing chamber

Abstract

The present invention relates to a transformer pipeline grounding structure using conductive paint, the structure comprising: coupling bolts which pass through and connect flanges connecting pipes, so as to couple the flanges; and conductive paint applied to some surface parts of the flanges through which the coupling bolts pass, so as to electrically connect the flanges. In the present invention, instead of a conventional task of connecting a grounding cable to both sides of pipes, electrically conductive paint is applied to flange surfaces or bolt fastening parts so as to perform grounding, and thus the time required for providing a grounding cable for connecting pipes can be reduced and worker safety is ensured by minimizing work at high places.

IPC Classes  ?

• H01F 27/12 - Oil cooling
• C09D 5/24 - Electrically-conducting paints
• F16L 23/036 - Flanged joints the flanges being connected by members tensioned axially characterised by the tensioning members, e.g. specially adapted bolts or C-clamps
• F16L 25/01 - Construction or details of pipe joints not provided for in, or of interest apart from, groups specially adapted for realising electrical conduction between the two pipe ends of the joint or between parts thereof

Abstract

The present invention relates to a triple-point electric field relaxation structure of a conductor insulation coating end of a gas-insulated switchgear, the triple-point electric field relaxation structure comprising: a hollow conductor having an opening part formed at one or more ends into which an electrical connection rod is inserted; an electric field relaxation groove part which is located adjacent to the opening part in the conductor and has a round shape; and an insulation coating member that is disposed so as to surround the outer wall portion and the inner wall portion of the opening part of the conductor, and that extends to the electric field relaxation groove part and surrounds a portion of the electric field relaxation groove part. The present invention has the advantage of removing a risk factor for insulation performance by applying a conductor-shaped structure for relaxing a triple-point electric field of an insulation coating end in order to partially apply an insulation coating to the conductor.

IPC Classes  ?

• H01H 33/02 - High-tension or heavy-current switches with arc-extinguishing or arc-preventing means Details
• H01H 33/42 - Driving mechanisms

Abstract

The present invention relates to a pod drive that can improve the cooling performance of a built-in motor. An embodiment comprises a motor that is disposed inside a pod and provided with a stator and a rotor in order to provide rotational force to a drive shaft. The stator includes: a stator core that is fixed inside the pod and surrounds the drive shaft; a coil that is wound around the stator core; a plurality of stator channels through which a refrigerant flows and which are arranged along the axial direction of the stator core and extend in a circumferential direction inside the stator core; and a plurality of stator guides which extend radially and are arranged, spaced a certain distance from each other along the circumferential direction of the stator core, in each of the stator channels. At least some of the plurality of stator guides may include a curved portion formed by curving radial outer ends.

IPC Classes  ?

• B63H 21/38 - Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like
• H02K 9/19 - Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
• H02K 1/20 - Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
• B63H 5/125 - Arrangements on vessels of propulsion elements directly acting on water of propellers movably mounted with respect to hull, e.g. adjustable in direction

Goods & Services

(1) Cast resin transformers; power units [transformers]; circuit breakers for transformers; tap changers for electric transformers; high voltage reactors; electric power distribution board (2) Electric control panels; electric current switches; electronic power transformers; voltage regulators

Goods & Services

Cast resin transformers being transformers; power units being transformers; circuit breakers for transformers; tap changers being voltage regulators for electric transformers; electronic power transformers; voltage regulators; high voltage reactors; electric switches; electric control panels; electric power distribution boards being electrical power distribution units

Abstract

A transformer overvoltage protection device and a transformer comprising same are disclosed. According to the transformer overvoltage protection device and the transformer comprising same, of the present invention, the transformer can be protected from abnormal voltage entering from the outside of the transformer in a ground/non-ground system and overvoltage caused by the resonance generated inside a transformer wiring, the transformer overvoltage protection device capable of being simply formed and installed without a separate structure or a design change can be provided, and the transformer can be protected from phase-phase overvoltage caused by a virtual cut current and internal resonance.

IPC Classes  ?

• H01F 27/40 - Structural association with built-in electric component, e.g. fuse
• H02H 9/04 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage

Abstract

A vacuum circuit breaker according to an embodiment of the present invention may include: a pressure vessel filled with insulation gas at a predetermined pressure; a vacuum interrupter disposed inside the pressure vessel and provided with a fixed electrode and a movable electrode which are in a vacuum tube in a vacuum state; a bellows provided to seal a gap between the vacuum tube and the movable electrode; a movable rod which has one end connected to an end of the movable electrode by means of an insulation link, extends through the pressure vessel, and can reciprocate in an axial direction thereof while maintaining air-tightness therebetween; a drive rod which is disposed outside the pressure vessel and at the other end of the movable and transmits a drive force of a drive part to the movable rod; and a contact pressure spring having one end supported by the movable rod and the other end supported by the drive rod, wherein the ratio of a self-closing force with respect to a minimum closing contact pressure of the vacuum interrupter is set to a predetermined ratio.

IPC Classes  ?

• H01H 33/662 - Housings or protective screens
• H01H 33/666 - Operating arrangements

Abstract

The present invention relates to a vacuum circuit breaker that can increase structural stability and reduce required space by reducing the distance from a pressure vessel to a driving unit. A vacuum circuit breaker, according to one embodiment, may comprise: a pressure vessel that is filled with insulating gas at a predetermined pressure; a vacuum interrupter disposed inside the pressure vessel and having a fixed electrode and a movable electrode within a vacuum tube in a vacuum state; and a spring module that has one side connected to an end of the movable electrode through an insulating link, moves through the pressure vessel while maintaining airtightness to transmit driving force of a driving unit to the movable electrode, and is equipped with a spring that applies contact pressure to the movable electrode when closing the contacts.

IPC Classes  ?

• H01H 33/666 - Operating arrangements
• H01H 33/662 - Housings or protective screens

Abstract

The present invention relates to a device for sensing a partial discharge of a transformer, the device detecting a partial discharge in a transformer and being capable of measuring the position thereof. The device for sensing a partial discharge of a transformer, according to one embodiment, may comprise: a case which is provided in the transformer and which has a hollow portion; an omni-directional first sensor which is disposed at one side in the case and which detects a partial discharge signal of the transformer; and a directional second sensor which is disposed at the other side in the case and which detects the partial discharge signal of the transformer.

IPC Classes  ?

• G01R 31/12 - Testing dielectric strength or breakdown voltage
• G01R 31/62 - Testing of transformers
• G01R 23/02 - Arrangements for measuring frequency, e.g. pulse repetition rateArrangements for measuring period of current or voltage
• G01R 1/04 - HousingsSupporting membersArrangements of terminals

Abstract

A protection system of ship's power distribution system, when a fault occurs in the feeder preset to be in charge of the third circuit breaker module, the relay of the third circuit breaker module trips the circuit breaker based on a magnitude and a direction of a fault current, and to transmit a power distribution maintenance signal to the relay of the second circuit breaker module. When a fault occurs in the switchboard preset to be in charge of the second circuit breaker module, the relays of the second and third circuit breaker modules trip the circuit breaker based on a magnitude and a direction of a fault current and the relay of the second circuit breaker module transmit a power distribution maintenance signal to the relay of the third circuit breaker module preset based on the magnitude and direction of the fault current.

IPC Classes  ?

• H02H 7/22 - 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 distribution gear, e.g. bus-bar systemsEmergency 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 switching devices
• H02H 3/08 - 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
• H02H 3/05 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection Details with means for increasing reliability, e.g. redundancy arrangements
• H02H 7/26 - Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occurred
• B60R 16/03 - Electric or fluid circuits specially adapted for vehicles and not otherwise provided forArrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric for supply of electrical power to vehicle subsystems

Goods & Services

CDs; DNA analysis apparatus; LED signs; computer software for SCADA system; gas alarms; electronic control apparatus, being gas shut-off apparatus; gas masks; gas sensors; gas insulated switchgear [electric]; egg-candlers; warning alarms; calculating machines and data processing apparatus; electric relays; high-pressure vacuum contactors; high voltage circuit breaker; optical apparatus and instruments except for glasses and photographic apparatus; life-saving apparatus and equipment; surge protectors; electronic control systems for machines; recorded computer game software; digital books downloadable from the internet; network servers; network operating system programs; exposed films; data processing apparatus; power control panels; digital information processors; digital electric lock; electric reactors; metronomes; biochips; semi-conductors; signals, luminous or mechanical; protective industrial boots; electric power distribution machines; switchboards; distribution transformers; measuring apparatus for voltage, electric current, temperature of battery; bus ducts; transformers; electric power converters; current converters; voltage converters; shunt reactors; processed glasses, not for building; ear protectors and ear protecting devices for industrial purposes; surge protecting outlet; ship to shore communications apparatus; computer software for ships; fire boats; fire trucks; laboratory robots; eye glasses; ozonisers [ozonators]; welding helmets; remote control apparatus; satellite apparatus; computer application software for mobile phones; inverters; breathing apparatus for underwater swimming; switchgear [electric]; electric door bells; monitoring control apparatus [electric]; apparatus for measuring electric energy consumption; electrified fences; electric batteries for powering electric vehicles; electricity measuring apparatus and instruments; electric cables, wires, conductors and connection fittings therefor; electric circuit interrupters; meters for measuring electric power; electronic power supplies; electronic power transformers; apparatus for diagnosing electrical power installations; apparatus and instruments for diagnosing electrical power installations; apparatus for measuring, monitoring and analyzing electricity consumption; electric power control machines; voltage regulators; electronic signaling whistles; electronic contactors; electronic coupons; batteries and battery chargers; apparatus for recording, transmission or reproduction of information; abacuses; low and medium voltage circuit breakers; circuit breakers; rechargers for electric accumulators; T-squares for measuring; measuring apparatus; computer operating system software; computer game cartridges; computers; computer servers; computer software platforms; computer software to maintain and operate computer systems; inverter used in solar power generation; telecommunications software; communications equipment; ticket dispensers; video conference system; fire control apparatus; clothing for protection against chemicals; revolution indicator.

Goods & Services

Pre-recorded CDs featuring music; medical laboratory research instruments for DNA analysis apparatus; LED signs; downloadable computer software for SCADA (Supervisory Control And Data Acquisition) systems, namely, to monitor and control power generation; gas alarms; electronic control valves, being gas shut-off apparatus; gas masks; gas sensors for measuring concentration; electric gas insulated switchgear; egg-candlers; warning alarms, namely, smoke alarms; calculating machines [ and data processing apparatus ] ; electric relays; high voltage circuit breaker; optical character recognition apparatus and instruments except for glasses and photographic apparatus; life-saving rafts; surge protectors; electronic control systems for machines; recorded computer game software; digital books downloadable from the internet in the field of electric power solution, energy solution and marine technology; network servers; downloadable network operating system programs; exposed camera films; power control panels, namely, electric control panels; digital information processors, namely, signal processors; digital electric lock; electric reactors; metronomes; biochips for research or scientific purposes; semi-conductors; luminous or mechanical road signs; protective industrial boots; electric power distribution machines; switchboards; distribution transformers; measuring apparatus for voltage, electric current, temperature of battery; [ bus ducts, namely, electrical ducts; ] transformers; [ electric power converters; ] current converters; [ electric voltage converters; ] shunt reactors, namely, high voltage reactors; processed glasses, not for building, namely, optical lenses made of glass; ear protectors and ear protecting devices for industrial purposes, namely, protective ear covering shields; surge protecting outlet; ship to shore communications apparatus, namely, radio transmitters and receivers; downloadable computer software for controlling and monitoring a ship's general machinery, namely, pumps, compressors, tank levels, ventilation, hydraulic units, cranes, door sensors, fire sensors; fire boats; fire trucks; laboratory robots; eye glasses; ozonisers; welding helmets; remote control apparatus for electric power controllers, transformers, circuit breakers, inverters and electric power distribution machines; satellite television receiving apparatus; downloadable computer application software for controlling and monitoring a ship's general machinery, namely, pumps, compressors, tank levels, ventilation, hydraulic units, cranes, door sensors, fire sensors for mobile phones; inverters; breathing apparatus for underwater swimming; electric switchgear; electric door bells; wireless controllers to monitor the functioning of other electronic devices, excluding gaming apparatus; apparatus for measuring electric energy consumption; electrified fences; electric batteries for powering electric vehicles; electricity measuring apparatus and instruments; electric cables, wires, conductors and connection fittings therefor; electric circuit interrupters; meters for measuring electric power; electronic power supplies; electronic power transformers for amplification; apparatus for diagnosing electrical power installations and instruments for diagnosing electrical power installations, namely, for checking and testing the functioning of electrical power supplies, electric power control panels, electric power distribution units and transformers; apparatus and instruments for diagnosing electrical power installations, namely, apparatus for measuring, monitoring and analyzing electricity consumption; electric power controllers; voltage regulators; electronic signaling whistles; electronic consumer coupons downloadable from a global computer network; batteries and battery chargers; apparatus for recording, transmission or reproduction of information; abacuses; low and medium voltage circuit breakers; circuit breakers; rechargers for electric accumulators; T-squares for measuring; voltage measuring apparatus; downloadable computer operating system software; computer game cartridges; computers; computer servers; downloadable computer software platforms for the control, monitoring and alarming of vessel and ship systems via a remote user interface; downloadable computer software to maintain and operate computer systems; inverter used in solar power generation; downloadable telecommunications software for transmission, switching, reception and processing of voice calls; communications equipment, namely, wireless communication devices for voice, data or image transmission; electronic parking lot ticket dispensers; video conference phones; fire pump control valves; clothing for protection against chemicals; revolution indicators for use in measuring voltage

Goods & Services

(1) Pre-recorded CDs featuring music; DNA sequence analysis apparatus, namely scientific laboratory research instruments for DNA sequence analysis for scientific research purposes; LED signs; downloadable computer software for SCADA (Supervisory Control And Data Acquisition) systems, namely, to monitor and control electrical power generation; gas alarms; electronic control valves, being gas shut-off valves; gas masks; gas sensors; electrical power supplies, namely, gas insulated switchgears; egg-candlers; warning alarms, namely, smoke alarms; electric relays; high voltage circuit breaker; optical character recognition apparatus; optical sensors; life-saving rafts; surge protectors; electronic control apparatus for improving power efficiency namely low voltage converter, low and medium voltage circuit breakers; recorded computer game software; digital books downloadable from the internet; network servers; network operating system programs; exposed films; data-processing equipment namely, computer hardware, integrated circuits and network servers and computers; power control panels, namely, electric control panels, power distribution panels; digital information processors, namely, signal processors; digital electric locks for vehicles, digital door locks, electronic door locks; electrical reactors; metronomes; biochips sensors; semi-conductors; signals, luminous or mechanical; protective boots for protection against accidents or injury; electric power distribution machines; switchboards; distribution transformers; meters for measuring voltage, multimeters for measuring electrical voltage, meters for measuring electric current, multimeters for measuring electric current, temperature indicators for batteries; acoustic transformers, audio transformers, current transformers, distribution transformers, electric transformers, voltage transformers, high-voltage transformers, power transformers, step down and step up transformers; current converters; shunt reactors, namely, high voltage electrical reactors; processed glasses, not for building, namely, optical lenses made of glass; ear protectors and ear protecting devices for industrial purposes, namely, protective ear covering shields; surge protectors, ground fault circuit interrupters; ship to shore communications apparatus, namely, radio transmitters and receivers; downloadable computer software for controlling and monitoring a ship's general machinery, namely, pumps, compressors, tank levels, ventilation, hydraulic units, cranes, door sensors, fire sensors; fire boats; fire trucks; laboratory robots; eye glasses; ozonisers [ozonators]; welding helmets; remote controls for operating electronic controllers for use with power converters, transformers, circuit breakers, inverters and electric power distribution boxes; satellite television receiver; downloadable computer application software for mobile phones for controlling and monitoring a ship's general machinery, namely, pumps, compressors, tank levels, ventilation, hydraulic units, cranes, door sensors, fire sensors; power inverters, inverters for power supply; breathing apparatus for underwater swimming; electric switchgear namely, voltage boosting devices for electric power lines; electric door bells; wireless controllers to remotely monitor the functioning of other security systems; apparatus for measuring, monitoring, analyzing electricity consumption, namely, energy monitors, optical sensors, LED monitors; electrified fences; electric batteries for powering electric vehicles; electric cables, wires, electrical conductor cables and connection fittings therefor; electric circuit interrupters; meters for measuring electric power; electronic power supplies namely, switchgears namely, voltage boosting devices for electric power lines; electronic power transformers; meters for checking and testing the functioning of high voltage power supplies and low voltage power supplies, electric control panels, electric power distribution units and transformers; apparatus for diagnosing electrical power installations, namely, multimeters, voltage detectors, megohmmeters, microohmmeters, ground resistance testers, gaussmeters, hipot testers; meters for the measuring, monitoring and analyzing of electrical energy consumption; electric power controllers namely, low and medium voltage circuit breakers; voltage regulators; electronic signaling whistles; electrical contactors; electrical storage batteries, electric batteries for vehicles and battery chargers for electrical storage batteries and electric batteries for vehicles; data collecting apparatus for ships namely network servers to collect and disseminate information about energy usage and energy loads to all for the energy-efficiency and economical operation of ship propulsion systems and building power systems; abacuses; low and medium voltage circuit breakers; circuit breakers; rechargers for electric accumulators; T-squares for measuring; meters for measuring electrical voltage; computer operating system software; computer game cartridges; computers; computer servers; downloadable computer software platforms for the control, monitoring and alarming of vessel and ship systems via a remote user interface; computer software to maintain and operate computer systems; inverter used in solar power generation; communications software for electronically exchanging audio, via computer, mobile, wireless and telephone networks; communications equipment, namely, wireless communication devices for voice, data or image transmission, namely smartphones, laptop computers; ticket dispensers; video conference telephones; fire pump control valves; clothing for protection against chemicals; revolution indicators for use in measuring voltage, revolution counters.