公开(公告)号：US11482997B2

公开(公告)日：2022-10-25

申请号：US17268307

申请日：2019-08-21

Applicant: LS ELECTRIC CO., LTD. ,  SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION

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.

公开(公告)号：US12278483B2

公开(公告)日：2025-04-15

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 ,  H02H3/027 ,  H02H3/05 ,  H02M1/34 ,  H03K17/567

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.

公开(公告)号：US11955954B2

公开(公告)日：2024-04-09

申请号：US17606945

申请日：2020-03-19

Applicant: LS ELECTRIC CO., LTD.

Inventor： Woonghyeob Song ,  Jungwook Sim ,  Chaeyoon Bae

IPC: H03K17/081 ,  H01C7/12 ,  H02H9/00 ,  H02H9/04 ,  H01C7/108 ,  H01C7/112

CPC classification number: H03K17/08104 ,  H01C7/12 ,  H02H9/005 ,  H02H9/04 ,  H01C7/108 ,  H01C7/112

Abstract: The present disclosure relates to a semiconductor circuit breaker and, more specifically, to a semiconductor circuit breaker in which a protection circuit is modularized and thus maintenance and repair can be easily done. A semiconductor circuit breaker according to an embodiment of the present disclosure comprises: a main circuit unit connected between a power source and a load and having a semiconductor switch; an outer box equipped with the main circuit unit and having a module accommodation unit outside thereof; and a protection module detachably accommodated in the module accommodation unit.

公开(公告)号：US12068125B2

公开(公告)日：2024-08-20

申请号：US17923159

申请日：2021-03-29

Applicant: LS ELECTRIC CO., LTD.

Inventor： Woonghyeob Song ,  Jungwook Sim

IPC: H01H9/20 ,  H01H9/02 ,  H01H9/54 ,  H01H71/02 ,  H01H71/10

CPC classification number: H01H9/20 ,  H01H9/0264 ,  H01H9/541 ,  H01H71/0214 ,  H01H71/10

Abstract: The present disclosure relates to a semiconductor circuit breaker, and more specifically, to a semiconductor circuit breaker provided with a detachable interface module. The semiconductor circuit breaker, according to one embodiment of the present disclosure, comprises: a circuit breaker main body connected to a main circuit and provided with a module receiving unit on the outer surface thereof; and an interface module provided independently from the circuit breaker main body and detachably coupled to the module receiving unit. The circuit breaker main body comprises: a terminal cover rotatably coupled to a terminal unit of the circuit breaker main body; and an interlock member provided to the circuit breaker main body and restricting or releasing the opening of the terminal cover. The interface module comprises an interlock driving unit for operating the interlock member.