公开(公告)号：US20220301798A1

公开(公告)日：2022-09-22

申请号：US17639090

申请日：2020-04-07

Applicant: LS ELECTRIC CO., LTD.

Inventor： Jinhee PARK ,  Jungwoo YOO

IPC: H01H50/38 ,  H01H50/54 ,  H01H51/01

Abstract: Shown are an arc path formation unit and a direct current relay including same. The arc path formation unit according to an embodiment of the present disclosure includes a plurality of magnet parts. The magnet parts form a magnetic field at the point at which each fixed contact is positioned. Each magnet part positioned adjacent to each fixed contact is formed so that opposite surfaces thereof facing each other have different polarities. An electric current flowing through the fixed contact and a movable contact, and the magnetic field generated by each magnet part form an electromagnetic force. The electromagnetic force moves away from the center of the direct current relay. Therefore, the generated arc moves in the direction of the electromagnetic force so as to move away from the center of the direct current relay. Thus, damage to the direct current relay can be prevented.

公开(公告)号：US20220301797A1

公开(公告)日：2022-09-22

申请号：US17639061

申请日：2020-04-07

Applicant: LS ELECTRIC CO., LTD.

Inventor： Jinhee PARK ,  Jungwoo YOO

IPC: H01H50/38 ,  H01H51/01 ,  H01H50/60

Abstract: Disclosed are an arc path forming unit and a direct current relay comprising same. The arc path forming unit according to an embodiment of the present disclosure comprises a single magnet unit disposed on one side of a magnet frame, and a plurality of magnet units disposed on another side opposite to the one side. The plurality of magnet units are sequentially arranged in the longitudinal direction. One side of a magnet unit positioned between at least two of the plurality of magnet units and facing the single magnet unit is magnetized with the same polarity as that of one side of the single magnet unit facing the magnet unit. As such, magnetic fields in the direction of exerting repulsive forces on each other are formed in the central portion of the direct current relay. Accordingly, since the arc does not move to the central portion, damage to components disposed in the central portion can be prevented.

公开(公告)号：US11444437B2

公开(公告)日：2022-09-13

申请号：US17276900

申请日：2019-08-29

Applicant: LS ELECTRIC CO., LTD.

Inventor： Hyukil Kwon ,  Kwangkyu Hwang ,  Kwanseung An

IPC: H02B1/20 ,  H02M3/00 ,  H02J9/06 ,  H02M7/00

Abstract: A power supply apparatus includes a plurality of power modules for receiving alternating current power to provide the power to a load; an uninterruptible supply module to supply self-power to the load; an inverter module installed on one side of the power modules or the uninterruptible supply module to convert the power and provide converted power to the load; direct current bus bars provided inside enclosures of the power modules, the uninterruptible supply module, and the inverter module, respectively; and a connection bus bar for connecting adjacent direct current bus bars, wherein in the power modules and the uninterruptible supply module, an alternating current/direct current converter or a direct current/direct current converter is provided in the upper portion of the direct current bus bar, or the alternating current/direct current converter or the direct current/direct current converter is provided in the lower portion of the direct current bus bar.

公开(公告)号：US11443911B2

公开(公告)日：2022-09-13

申请号：US16772556

申请日：2018-11-22

Applicant: LS ELECTRIC CO., LTD.

Inventor： Kyunghwan Oh ,  Kihwan Oh

IPC: H01H73/18 ,  H01H73/06 ,  H01H73/04 ,  H01H9/36

Abstract: The present device was conceived in order to resolve the aforementioned problem, and the objective thereof is to provide an arc chamber of a circuit breaker that enhances assemblability and ensures the consistency of the product. An arc chamber of the circuit breaker according to one embodiment of the present device comprises: a plurality of grids arranged at predetermined intervals outside a motion locus of a movable contactor and having a body portion and a leg portion extending from one side of the body portion; and a fixing cap having a receiving portion that is inserted into the leg portion in a press-fitting manner, wherein the fixing cap has a coupling portion extending to a side of the body portion at one side thereof.

公开(公告)号：US20220246376A1

公开(公告)日：2022-08-04

申请号：US17612059

申请日：2020-04-24

Applicant: LS ELECTRIC CO., LTD.

Inventor： Gyeongho LEE

IPC: H01H33/662 ,  H01H33/664 ,  H01H33/666

Abstract: The present disclosure relates to a bypass switch used in a super-high voltage direct current transmission sub-module including a case; a first bus bar; a second bus bar; a fixing contact provided in a hollow part and connected to the first bus bar; a movable contact provided in the hollow part, and connected to the second bus bar so as to come into contact with or be separated from the fixing contact; an insulating cover coupled to the rear surface of the second bus bar, and having an accommodation part therein; a movable part extension rod provided on the accommodation part and coupled to the movable contact; and an actuator provided on the rear part of the insulating cover, and providing power for moving the movable part extension rod.

公开(公告)号：US20220206069A1

公开(公告)日：2022-06-30

申请号：US17601576

申请日：2020-03-09

Applicant: LS ELECTRIC CO., LTD.

Inventor： Woo-Young CHOI ,  Hyun-Wook LEE

IPC: G01R31/327 ,  H01H33/664

Abstract: The present disclosure relates to a contact monitoring device for a vacuum circuit breaker, which may compensate for errors of a contact monitoring device capable of monitoring a contact wear amount in a vacuum interrupter, and to a vacuum circuit breaker comprising same. According to the present disclosure, the contact monitoring device for a vacuum circuit breaker may determine an appropriate time for maintenance and repair by monitoring in real time a contact wear amount using a photosensor. Moreover, the contact monitoring device for a vacuum circuit breaker, by using two photosensors, minimizes position errors with respect to the photosensors or a push rod that may be present inherently in the sensors or occur due to an installation state, and thus, may detect the contact wear amount with precision.

公开(公告)号：US20220200842A1

公开(公告)日：2022-06-23

申请号：US17442667

申请日：2019-08-27

Applicant: LS ELECTRIC CO., LTD.

Inventor： Geon YOON ,  Sung-Han LEE

IPC: H04L41/0654 ,  H04L12/437 ,  H04L12/18 ,  H04L41/0631

Abstract: The present disclosure relates to a method for network recovery when a communication failure has occurred in a RAPIEnet system. According to the present disclosure, through periodic transmission of a message for inspecting whether a network communication failure has occurred between LNM devices or between RNMs in a ring- or line-shaped network in a RAPIEnet system, it is possible to accurately determine whether a network has a communication failure, and recover the network without imposing a burden on the network.

公开(公告)号：US20220200269A1

公开(公告)日：2022-06-23

申请号：US17432695

申请日：2019-07-11

Applicant: LS ELECTRIC CO., LTD.

Inventor： Jin Kyu YANG

IPC: H02H7/122 ,  H02M7/5395 ,  H02M1/32

Abstract: An inverter protection device is disclosed. An inverter protection device, which determines whether or not a pulse-width modulation (PWM) control signal provided to an inverter unit of an inverter is blocked in accordance with a voltage signal received from first and second switches of a safety relay which are parallelly connected, comprises: a first power switch which is switched to an on-state by means of a first voltage signal applied from the first switch; a second power switch which is switched to an on-state by means of a second voltage signal applied from the second switch; and a buffer unit which is on-off controlled in accordance with an output current of the first and second power switches and provides the PWM control signal to the inverter unit.

公开(公告)号：US20220199341A1

公开(公告)日：2022-06-23

申请号：US17602158

申请日：2020-03-09

Applicant: LS ELECTRIC CO., LTD.

Inventor： E-Jae CHOI

IPC: H01H33/664 ,  H01H33/666 ,  G01R31/327

Abstract: The present disclosure relates to a contact point monitoring module for a vacuum circuit breaker and a vacuum circuit breaker comprising the same. The present disclosure provides a vacuum circuit breaker comprising a push rod assembly which is coupled to a movable electrode of a vacuum interrupter and moves the movable electrode up or down to make a movable contact in a contact closed state or a contact open state, wherein the vacuum circuit breaker comprises a linear sensor which is coupled to a lower side of the push rod assembly and senses displacement according to a moving direction of the push rod; and a sensor holder which is installed adjacent to the lower side of the push rod assembly and is coupled to the linear sensor to process a signal transferred from the linear sensor.

公开(公告)号：US20220183193A1

公开(公告)日：2022-06-09

申请号：US17601524

申请日：2020-03-19

Applicant: LS ELECTRIC CO., LTD.

Inventor： Soo-Yong HWANG

IPC: H05K7/20

Abstract: The present disclosure relates to a power electronic device with an automatic ventilation module, comprising: an enclosure in which a heating component is accommodated; and an automatic ventilation module, installed on one side of the enclosure, for opening and closing a part of the enclosure based on the temperature of the heating component, wherein the automatic ventilation module comprises a driving unit for generating power; a connection unit for transmitting the power generated by the driving unit; a ventilation unit for receiving the power from the connection unit and disposed with a front plate for opening and closing a part of the enclosure; a temperature sensor for measuring the temperature of the inside of the enclosure; and a control unit for controlling the driving unit on the basis of a measured value of the temperature sensor so as to adjust the degree of opening and closing of the front plate.