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1.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：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：US20210305980A1
公开(公告)日：2021-09-30
申请号：US17268307
申请日：2018-08-27
Inventor： Jungwook SIM , Suhyeong JANG , Sunghee KANG , Woonghyeob SONG , Seungki SUL , Donghoon PARK , Dongho SHIN
IPC: H03K17/687 , H02H3/087
Abstract: The present disclosure relates to a bidirectional semiconductor circuit breaker including a primary circuit unit connected between a power supply and a load and in which a first semiconductor switch and a second semiconductor switch are arranged in series and a snubber circuit unit of which one end is connected to the front end of the first semiconductor switch and the other end is connected to the rear end of the second semiconductor switch, in parallel. The snubber circuit unit includes a first circuit line, a second circuit line, and a third circuit line of which one end and the other end are connected to the first circuit line and the second circuit line, respectively, and in which a first resistor and a second resistor are arranged in series, and provide a snubber circuit which is applicable to a bidirectional fault current and satisfies semiconductor protection and current restraining performance.
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Patent Agency Ranking
公开(公告)号：US20230216291A1
公开(公告)日：2023-07-06
申请号：US17928537
申请日：2021-03-30
Applicant: LS ELECTRIC CO., LTD.
Inventor： Jungwook SIM , Jaeho LEE , Woonghyeob SONG , Sunghee KANG
IPC: H02H7/20 , H02M1/34 , H03K17/567 , H02H3/027 , H02H3/05
CPC classification number: H02H7/20 , H02M1/34 , H03K17/567 , H02H3/027 , H02H3/05
Abstract: The present disclosure relates to a solid insulated switch using a semiconductor comprising a main circuit unit connected between systems on both sides thereof, and which has a first semiconductor and a second semiconductor arranged in a series; a snubber circuit having a capacitor and a resistor arranged in a series, one end connected in parallel to the front end of the first semiconductor switch, and the other end connected in parallel to the rear end of the second semiconductor switch; a freewheeling circuit, having a diode and a resistor arranged in a series, one end connected to a common contact between the first semiconductor switch and the second semiconductor switch, and the other end connected to the ground; and a mechanical switch for ensuring physical insulation after fault current interruption.
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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：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：US20220206046A1
公开(公告)日：2022-06-30
申请号：US17602601
申请日：2020-03-25
Applicant: LS ELECTRIC CO., LTD.
Inventor： Sunghee KANG
IPC: G01R19/32 , G01R31/26 , G01R19/165
Abstract: The present disclosure relates to a monitoring system for a plurality of power devices serially connected in a main circuit of a current transmission path comprising a first power device and a second power device each including a semiconductor element; a first sensor connected to the first and second power devices, and which senses information related to a first current flowing in the first power device; a second sensor for sensing information related to a second current flowing in the second power device; a third sensor for sensing information related to a third current flowing between the first power device and the second power device; and a control unit for comparing the first current and the second current on the basis of the third current measured by the third sensor, and determining whether the state of each power device is abnormal based on a difference with the third current.
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