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公开(公告)号：US20250080110A1
公开(公告)日：2025-03-06
申请号：US18284815
申请日：2022-02-14
Applicant: LS ELECTRIC CO., LTD.
Inventor： Dongjin YUN , Jungwook SIM , Woonghyeob SONG , Sunghee KANG
IPC: H03K17/687
Abstract: The present disclosure comprises: a semiconductor switch unit including a first semiconductor switch having a drain terminal connected to a power grid, a second semiconductor switch having a drain terminal connected to a load, and first and second diodes each having a positive electrode and a negative electrode respectively connected to a source terminal and the drain terminal of each semiconductor switch; a bypass circuit which connects the drain terminal of the first semiconductor switch to the source terminal of the second semiconductor switch; and a control unit which, when the power grid is connected to the semiconductor circuit breaker, supplies a current to the load through the bypass circuit and the second diode by closing the bypass circuit while the first and second semiconductor switches are turned off, and which, when preset conditions are met, turns on the first and second semiconductor switches so as to open the bypass circuit so that a current is supplied to the load through the semiconductor switch unit.
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公开(公告)号：US20240297000A1
公开(公告)日：2024-09-05
申请号：US18281245
申请日：2022-02-16
Applicant: LS ELECTRIC CO., LTD.
Inventor： Woonghyeob SONG , Jungwook SIM , Sunghee KANG , Dongjin YUN , Jaeho LEE
Abstract: The present disclosure relates to a semiconductor circuit breaker, and more particularly, to a semiconductor circuit breaker having excellent heat dissipation. The semiconductor circuit breaker according to one embodiment of the present invention comprises: a switching device provided in an upper space of an enclosure; an air gap switch (mechanical switch) provided in the upper space and disposed forward of the switching device; an electric circuit disposed on an upper portion of the switching device; a heatsink provided in a lower space of the enclosure and coupled to a lower portion of the switching device; and a cooling fan provided in the lower space and disposed in a front portion of the enclosure.
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公开(公告)号：US20240388080A1
公开(公告)日：2024-11-21
申请号：US18691963
申请日：2022-10-12
Applicant: LS ELECTRIC CO., LTD.
Inventor： Dongjin YUN , Sunghee KANG , Woonghyeob SONG
Abstract: The present disclosure relates to a solid state circuit breaker, comprising: a semiconductor switch unit including a semiconductor switch that electrically connects or disconnects a power system and a load according to a voltage applied to a gate terminal; and a control unit that, when the semiconductor circuit breaker is turned on, controls the semiconductor switch to repeat turn-on and turn-off operations for a predetermined initial driving time so as to gradually alleviate the magnitude of inrush current caused by an initial connection between the power system and the load.
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公开(公告)号：US20210288519A1
公开(公告)日：2021-09-16
申请号：US17275936
申请日：2019-09-03
Applicant: LS ELECTRIC CO., LTD.
Inventor： Dohyun KIM , Dongjin YUN , Minjun PARK
Abstract: The present specification relates to a power supply system which enables uninterruptible power supply, wherein a circuit breaker is provided to switch on/off each of electric circuits via which a plurality of power supply devices are connected, and thus the UPS function can be performed among the plurality of power supply devices by opening or closing the circuit breaker according to various situations occurring in the system to control power reception and supply.
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Patent Agency Ranking
5.发明公开公开(公告)号：US20240312752A1
公开(公告)日：2024-09-19
申请号：US18575615
申请日：2022-05-20
Applicant: LS ELECTRIC CO., LTD.
Inventor： Woonghyeob SONG , Dongjin YUN , Sunghee KANG
IPC: H01H85/046 , H01H85/02 , H01H85/041
CPC classification number: H01H85/046 , H01H85/0411 , H01H2085/0283
Abstract: The present disclosure relates to an overvoltage suppression unit provided in a semiconductor circuit breaker using a semiconductor switch for power, the overvoltage suppression unit comprising: an overvoltage suppression element unit disposed on a first surface of a printed circuit board and including at least one overvoltage suppression element; a pattern fuse connected to the overvoltage suppression element unit and patterned on the first surface of the printed circuit board; a first case forming a housing and covering the first surface of the printed circuit board on which the pattern fuse and the overvoltage suppression element unit are disposed; and a lead wire connected to the pattern fuse, wherein the lead wire is formed so as to connect the first surface of the printed circuit board and a second surface of the printed circuit board.
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公开(公告)号：US20220115902A1
公开(公告)日：2022-04-14
申请号：US17275557
申请日：2019-09-10
Applicant: LS ELECTRIC CO., LTD.
Inventor： Minjun PARK , Dongjin YUN , Jihong KIM , Dohyun KIM , Kwangkyu HWANG
IPC: H02J9/06
Abstract: The present specification relates to a power supply system capable of supplying uninterruptible power, the system comprising a plurality of circuit breakers for controlling the connections between a plurality of power source modules, to control power demand and supply through opening or closing of the circuit breakers according to various situations occurring in the system, so as to enable a UPS function between the plurality of power source modules.
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公开(公告)号：US20240178656A1
公开(公告)日：2024-05-30
申请号：US18284758
申请日：2022-02-14
Applicant: LS ELECTRIC CO., LTD.
Inventor： Jungwook SIM , Dongjin YUN , Sunghee KANG , Woonghyeob SONG
CPC classification number: H02H7/18 , H02J7/00304 , H02J7/0031 , H02J7/0047 , H02J7/00712
Abstract: The present disclosure comprises: a solid-state circuit breaker, which is arranged between a battery system and a line and includes a semiconductor switch for providing an electrical connection or insulation between the battery system and the line according to the voltage applied to a gate terminal; an interrupter switch for providing a physical connection or separation between the solid-state circuit breaker and the line; and a rack battery management system which controls a gate driver applying the gate voltage, so as to provide insulation between the battery system and the line according to the result of sensing a current flowing between the battery system and the line, and which controls the interrupter switch to physically separate the solid-state circuit breaker from the line.
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公开(公告)号：US20240120727A1
公开(公告)日：2024-04-11
申请号：US18285922
申请日：2022-04-01
Applicant: LS ELECTRIC CO., LTD.
Inventor： Sunghee KANG , Jungwook SIM , Woonghyeob SONG , Dongjin YUN , Chaeyoon BAE
Abstract: The present disclosure relates to a power device protection apparatus. A power device protection apparatus according to an embodiment of the present invention comprises: a comparator which is connected to a power device, and determines whether an overcurrent of the power device occurs; and a control unit which controls the comparator so as to change, by software, a overcurrent reference value for determining whether the overcurrent occurs, wherein the control unit receives temperature information of the power device, changes the overcurrent reference value on the basis of the temperature information, and performs the overcurrent reference value change according to the temperature information, on the basis of the characteristics of the power device.
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公开(公告)号：US20230034870A1
公开(公告)日：2023-02-02
申请号：US17772632
申请日：2020-03-18
Applicant: LS ELECTRIC CO., LTD.
Inventor： Jiheon LEE , Dongjin YUN , Dohyun KIM , Jihong KIM , Minjun PARK , Wonseok DO
Abstract: The present disclosure relates to an uninterruptible power supply (UPS) system and, more specifically, to a static transfer switch (STS) that can be applied to a UPS module, the static transfer switch comprising: one semiconductor rectifying element connected to either the anode terminal or the cathode terminal of a direct current power source; a bypass circuit for connecting the input terminal and the output terminal of the semiconductor rectifying element so as to bypass the semiconductor rectifying element; a breaker for opening or closing the bypass circuit; and a switch including a control unit, which controls the semiconductor rectifying element so as to conduct current when a preset conduction signal is received, controls the breaker so as to close the bypass circuit, and, when the bypass circuit is closed by the breaker, controls the semiconductor rectifying element so as to stop the conduction of current.
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