公开(公告)号：US20220416680A1

公开(公告)日：2022-12-29

申请号：US17773656

申请日：2020-04-01

Applicant: LS ELECTRIC CO., LTD.

Inventor： Dong Sik KIM

IPC: H02M7/00 ,  H05K9/00 ,  H05K7/14

Abstract: The present disclosure relates to an inverter mounting structure having improved ease of assembly and durability, and capable of simplifying the structure of an inverter. According to one aspect of the present invention, provided is an inverter mounting structure comprising: a bracket fixed to an enclosure or a wall surface and forming an inverter accommodation space in which the inverter is accommodated and coupled; and an option case coupled to the outside of the bracket.

公开(公告)号：US20220415593A1

公开(公告)日：2022-12-29

申请号：US17638702

申请日：2020-04-07

Applicant: LS ELECTRIC CO., LTD.

Inventor： Jinhee PARK ,  Jungwoo YOO

IPC: H01H33/18 ,  H01H33/53

Abstract: An arc path forming unit and a direct current relay including same are illustrated. The arc path forming unit according to an embodiment of the present invention comprises multiple magnets. Each of the magnets is configured to form a magnetic field at a point where each stationary contact is located. Each of the magnets located adjacent to each stationary contact is configured such that the opposite surfaces thereof have different polarities. A current flowing through a stationary contact and a movable contact and a magnetic field formed by each of the magnets generate an electromagnetic force. The electromagnetic force travels in a direction away from the center of the direct current relay. Therefore, a generated arc travels in the direction of the electromagnetic force and is thus moved in a direction away from the center of the direct current relay. Accordingly, the direct current relay can be prevented from being damaged.

公开(公告)号：US20220384132A1

公开(公告)日：2022-12-01

申请号：US17755954

申请日：2020-03-27

Applicant: LS ELECTRIC CO.,LTD.

Inventor： Hong-Ik YANG

IPC: H01H71/10 ,  H01H71/02

Abstract: The present disclosure relates to a circuit breaker comprising: a circuit breaking part in which contact points of a fixed contact and a movable contact are in contact with each other; and an energy accumulation part for accumulating energy of a closing spring for controlling contact between the fixed contact and the movable contact, wherein the energy accumulation part comprises: an electromotive energy accumulation part; and a manual energy accumulation part separated from the electromotive energy accumulation part by a manual energy accumulation spring, and engaged with the electromotive energy accumulation part by unit of external pressure so as to transmit an inputted rotational force to the electromotive energy accumulation part, thereby accumulating the energy of the closing spring.

公开(公告)号：US20220317188A1

公开(公告)日：2022-10-06

申请号：US17641608

申请日：2020-05-11

Applicant: LS ELECTRIC CO., LTD.

Inventor： Min-Kyu SEO

IPC: G01R31/327 ,  H01H33/664 ,  H01H33/666 ,  H01H33/662

Abstract: The present disclosure provides a contact monitoring device for a vacuum circuit breaker. The contact monitoring device is provided in a vacuum circuit breaker comprising: a vacuum interrupter having a fixed electrode which is fixed in an insulating container and is provided with a fixed contact at one end, and a movable electrode which is installed in the insulating container to be able to be lifted or lowered wherein the vacuum interrupter is provided with a movable contact at one end, the movable contact contacting or being separated from the fixed contact when the movable electrode is lifted or lowered; and a push rod assembly which is coupled to the other end of the movable electrode and lifts or lowers the movable electrode. In addition, the present disclosure provides a vacuum circuit breaker having the contact monitoring device.

公开(公告)号：US20220293322A1

公开(公告)日：2022-09-15

申请号：US17638587

申请日：2020-04-28

Applicant: LS ELECTRIC CO., LTD.

Inventor： Jongkug SEON ,  Woojin JO ,  Jaehyeong KO

IPC: H01F7/18 ,  H01F7/06 ,  H01H1/54 ,  H01H47/22

Abstract: The present disclosure provides a coil driving device comprising: an input voltage sensing unit for sensing an input voltage; a switch unit configured to make a switching operation to supply a driving current to a coil; a PWM circuit unit for outputting a pulse width modulation (PWM) signal for the switching operation of the switch unit; an impedance adjustment unit for varying an impedance value such that the PWM signal is adjusted, thereby limiting the driving current; and a control unit for causing the impedance adjustment unit to vary the impedance value on the basis of the input voltage, thereby adjusting at least one of the duty ratio of the PWM signal and the frequency thereof.

公开(公告)号：US11430621B2

公开(公告)日：2022-08-30

申请号：US16954851

申请日：2018-11-12

Applicant: LS ELECTRIC CO., LTD.

Inventor： Sangchul Lee

IPC: H01H33/02 ,  H01H33/18

Abstract: A DC circuit breaker according to various embodiments may comprise: a first terminal unit connected to a power source; and a second terminal unit connected to the first terminal unit and connected to a load, wherein the first terminal unit includes at least a pair of first terminals connected to each other in parallel and connected to the power source, and the second terminal unit includes at least a pair of second terminals corresponding respectively to the first terminals and connected to each other in parallel so as to be connected to the load.

公开(公告)号：US20220254591A1

公开(公告)日：2022-08-11

申请号：US17626003

申请日：2019-08-23

Applicant: LS ELECTRIC CO., LTD.

Inventor： Jungwoo YOO

IPC: H01H50/38 ,  H01H50/02 ,  H01H50/54

Abstract: An arc path forming unit and a direct current relay are disclosed. An arc path forming unit according to an embodiment of the present invention comprises: a magnet frame extending in a longitudinal direction; and a plurality of main magnet units disposed in the width direction of the magnet frame. The surfaces, which face each other, of the main magnet units have the same polarity. Therefore, magnetic fields that repel each other are generated in a space between the respective main magnet units. An electromagnetic force in the direction oriented toward the outside of the arc path forming unit is formed by means of the magnetic fields. Thus, a generated arc can move in the direction of the electromagnetic force so as to be stably extinguished. As a result, various members positioned in the center of the direct current relay are prevented from being damaged by the arc.

公开(公告)号：US20220223362A1

公开(公告)日：2022-07-14

申请号：US17612443

申请日：2020-04-09

Applicant: LS ELECTRIC CO., LTD.

Inventor： Jinhee PARK

IPC: H01H50/18 ,  H01H50/54 ,  H01H9/44 ,  H01H1/54

Abstract: A direct current relay comprises a magnetism forming unit accommodated in a frame unit. The magnetism forming unit comprises a first magnet member and a second magnet member. A magnetism strengthening member is provided between the first and second magnet member. The magnetism strengthening member strengthens the magnetic field formed between the first and second magnet member. Therefore, the flow of the magnetic field formed inside an arc chamber is strengthened so as to effectively form an arc extinguishing path. The magnetism strengthening member can apply an electromagnetic attractive force to a movable core. Therefore, the movable core receives the electromagnetic attractive force according to magnetization of a fixed core, and also the electromagnetic attractive force from the magnetism strengthening member. Thus, since a driving force for moving the movable core increases, the operation reliability of the movable core can be improved.

公开(公告)号：US20220200440A1

公开(公告)日：2022-06-23

申请号：US17602907

申请日：2020-03-17

Applicant: LS ELECTRIC CO., LTD.

Inventor： Jae-Moon LEE ,  Chun-Suk YANG ,  Tae-Suk BAE

IPC: H02M1/32 ,  H02M7/5387 ,  H02P27/08 ,  H02P29/024

Abstract: The present disclosure relates to an overcurrent protection inverter, and more particularly, to an inverter, which uses a leg-shunt resistor so as to detect an instantaneous maximum output current and an AD current, thereby performing an inverter protection operation. The present disclosure detects the instantaneous maximum output current and detects the AD current from the leg-shunt resistor so as to perform an overcurrent protection operation when an overcurrent occurs in the entire inverter operation section, thereby enabling protection of the inverter.

公开(公告)号：US20220187371A1

公开(公告)日：2022-06-16

申请号：US17602604

申请日：2020-03-24

Applicant: LS ELECTRIC CO., LTD.

Inventor： Jae-Shik YOON

IPC: G01R31/327 ,  H02H7/00

Abstract: An example of the present disclosure provides a protective relay inspection device including: a connection unit connected to a protective relay; and an inspection unit which, upon receiving a relay setting-providing signal including relay setting information for the protective relay via the connection unit, processes an inspection of a relay function of the protective relay on the basis of the relay setting-providing signal. Here, the inspection unit includes: a plan generation unit which generates inspection plan information for an automatic inspection function on the basis of the relay setting-providing signal; and an inspection processing unit which inspects the relay function of the protective relay on the basis of the inspection plan information.