公开(公告)号：US11830690B2

公开(公告)日：2023-11-28

申请号：US17601578

申请日：2020-03-11

Applicant: LS ELECTRIC CO., LTD.

Inventor： Il-Hyun Kim

IPC: H01H33/53 ,  H01H33/18

CPC classification number: H01H33/182 ,  H01H33/53

Abstract: An arc-extinguishing unit structure for a direct current air circuit breaker according to one embodiment of the present disclosure comprises: a plurality of grids; side plates coupled to both sides of the plurality of grids so that the plurality of the grids are mounted so as to be spaced apart from each other; an exhaust cover positioned above the side plates and the plurality of grids; an arc guide coupled to the side plates so as to be located under the plurality of grids; a magnet coupled to the arc guide, wherein the magnet is magnetized with different poles on the basis of the plurality of grids and the vertical orientation of the arc guide.

公开(公告)号：US11800672B2

公开(公告)日：2023-10-24

申请号：US17268803

申请日：2019-08-13

Applicant: LS ELECTRIC CO., LTD.

Inventor： Min-Jee Kim ,  Sang-Hoon Lee ,  Chae-Yoon Bae

IPC: H05K7/02

CPC classification number: H05K7/02

Abstract: The present disclosure relates to a tower-shaped support device comprising: a plurality of main frames arranged in a vertical direction on a mounting surface; a plurality of support frames which are coupled to the main frames in a direction that is vertical with respect to the main frame while the pair of frames facing each other are arranged at the same height, and which support at least one current limiting resistance unit module for limiting the fault current of a power system; and a lower frame and an upper frame respectively provided at the upper and lower sides of the main frame and grounded.

公开(公告)号：US11776162B2

公开(公告)日：2023-10-03

申请号：US16971573

申请日：2019-01-21

Applicant: LS ELECTRIC CO., LTD.

Inventor： Min-Je Lee ,  Bum-Youl Kim

IPC: G01K1/02 ,  G01R31/327 ,  G06T7/90 ,  H01H71/04 ,  H01H73/00 ,  G01J5/00 ,  G01K7/22 ,  G06T7/00 ,  G06V10/141 ,  G06V10/56 ,  G01J5/80 ,  H01H11/00

CPC classification number: G06T7/90 ,  G01J5/00 ,  G01K1/026 ,  G01K7/22 ,  G01R31/3275 ,  G06T7/0008 ,  G06V10/141 ,  G06V10/56 ,  H01H71/04 ,  H01H73/00 ,  G01J5/80 ,  G01J2005/0077 ,  G06T2207/10024 ,  G06T2207/30108 ,  H01H2011/0068

Abstract: The present disclosure relates to a circuit breaker opening/closing assistance apparatus for correcting a thermal image of a circuit breaker on the basis of a visible image of the circuit breaker, and assisting an opening/closing operation of the relevant circuit breaker on the basis of a temperature identified through the corrected thermal image. Further, the present disclosure relates to a circuit breaker opening/closing assistance apparatus for identifying a temperature of a circuit breaker in which a failure has occurred, on the basis of a thermal image of the circuit breaker, and assisting an opening/closing operation of the relevant circuit breaker on the basis of the identified temperature.

公开(公告)号：US20230290599A1

公开(公告)日：2023-09-14

申请号：US18013487

申请日：2021-06-21

Applicant: LS ELECTRIC CO., LTD.

Inventor： Jung Woo YOO ,  Han Mi Ru KIM ,  Young Ho LEE

IPC: H01H50/38 ,  H01H50/54

CPC classification number: H01H50/38 ,  H01H50/54

Abstract: An arc path-forming part and a DC relay comprising same are disclosed. The arc path-forming part according to various embodiments of the present disclosure comprises a Halbach array and a magnet part that form a magnetic field in a space formed therein. The magnetic field formed by the Halbach array is stronger in the direction toward the space. The magnetic field formed by the Halbach array and the magnet part forms an electromagnetic force together with the current applied to each fixed contactor. Here, the electromagnetic force formed in the vicinity of each fixed contactor is formed in a direction away from the center of the space or in a direction away from each fixed contactor. Accordingly, a generated arc can be quickly extinguished and discharged by being induced by the electromagnetic force.

公开(公告)号：US20230282401A1

公开(公告)日：2023-09-07

申请号：US18016586

申请日：2020-09-23

Applicant: LS ELECTRIC CO., LTD.

Inventor： Min-Jee KIM ,  Ki-Nam YOO

IPC: H01F6/06 ,  H01F6/04

CPC classification number: H01F6/06 ,  H01F6/04

Abstract: Disclosed is a bobbin structure for winding a superconducting wired rod, which can secure a minimum radius of curvature that can prevent a deterioration in mechanical properties and a decrease in the uniformity of electromagnetic force distribution, due to contraction and expansion acting on the wire rod during quenching of the superconducting wire rod, and which also can ensure uniformity of temperature over all portions of the superconducting wire rod by securing a cooling channel required for cooling of the superconducting wire rod.

公开(公告)号：US11711028B2

公开(公告)日：2023-07-25

申请号：US17440533

申请日：2019-08-06

Applicant: LS ELECTRIC CO., LTD.

Inventor： Seung Cheol Choi ,  Hak Jun Lee

IPC: H02M7/5387 ,  H02P21/18 ,  H02P21/00 ,  H02P27/08

CPC classification number: H02M7/5387 ,  H02P21/0003 ,  H02P21/18 ,  H02P27/08

Abstract: Disclosed are an inverter control device and method. The method according to an embodiment of the present includes estimating a rotation speed of a motor, determining a slip frequency reference using an energy of a direct current terminal capacitor of an inverter, which provides an output voltage to the motor, and a direct current terminal energy reference when a direct current terminal voltage of the inverter is a certain level or less, and providing a frequency reference determined by adding the rotation speed of the motor and the slip frequency reference to the inverter.

公开(公告)号：US20230170167A1

公开(公告)日：2023-06-01

申请号：US17910713

申请日：2021-03-03

Applicant: LS ELECTRIC CO., LTD.

Inventor： Sang Chul LEE

IPC: H01H33/18 ,  H01H9/44 ,  H01H31/08

CPC classification number: H01H33/182 ,  H01H9/443 ,  H01H31/08

Abstract: An arc extinguishing unit and an air circuit breaker comprising same are disclosed. The arc extinguishing unit according to an embodiment of the present disclosure comprises an arc extinguishing magnet located above a grid. The arc extinguishing magnet forms a magnetic field in the arc extinguishing part and in a fixed contact and a movable contact that are located adjacent to the arc extinguishing part. An arc generated as the fixed contact and the movable contact are separated from each other receives an electromagnetic force in the formed magnetic field. The electromagnetic force passes through the grid and is formed in a direction facing the exterior of the arc extinguishing part. Thus, the generated arc may be quickly extinguished and moved.

公开(公告)号：US20230093089A1

公开(公告)日：2023-03-23

申请号：US17802056

申请日：2021-01-12

Applicant: LS ELECTRIC CO., LTD.

Inventor： Kyung Min KIM

IPC: F16F15/04 ,  H02M7/44

Abstract: Disclosed is an anti-vibration device. An anti-vibration device according to the embodiment of the present disclosure reduces vibration between an object and an installation surface on which the object is installed, and the anti-vibration device includes a first elastic member, a first support member disposed to cover the first elastic member and fastened to the first elastic member, a second elastic member disposed on an upper portion of the first support member, and a second support member disposed to cover the second elastic member and fastened to the first support member.

公开(公告)号：US20230078868A1

公开(公告)日：2023-03-16

申请号：US17801413

申请日：2021-01-07

Applicant: LS ELECTRIC CO., LTD.

Inventor： Jae Moon LEE ,  Tae Suk BAE

IPC: G01R1/20 ,  G01R31/327

Abstract: The present disclosure relates to a device and a method for diagnosing a failure of an inverter initial charging circuit. The device for diagnosing a failure of an initial charging circuit according to the present invention is advantageous as follows: it is possible to detect whether a relay of the initial charging circuit is malfunctioning or not by using a photocoupler connected in parallel with an initial charging resistor of the initial charging circuit, on the basis that, if a current flows through the initial charging resistor in a relay-on state, the photocoupler is turned on; and it is possible to prevent component failure or burnout from occurring due to a high current flowing through the initial charging resistor in the case of a relay failure.

公开(公告)号：US20220416687A1

公开(公告)日：2022-12-29

申请号：US17756868

申请日：2020-03-16

Applicant: LS ELECTRIC CO., LTD.

Inventor： Chengde XU

IPC: H02M7/5395 ,  H02M1/32 ,  H02M1/00

Abstract: An apparatus and a method for controlling an inverter are disclosed. A method, according to one embodiment of the present disclosure, receives an operation command for an inverter, outputs a first PWM control signal, to an inverter unit, such that the inverter unit outputs at least one among a plurality of valid vectors for the diagnosis of a short circuit of the output of the inverter, and blocks the output of the inverter if a short circuit current of the inverter is detected.