公开(公告)号：US20230100293A1

公开(公告)日：2023-03-30

申请号：US17801383

申请日：2020-12-23

Applicant: LS ELECTRIC CO., LTD.

Inventor： Kyeong Rae KIM

IPC: G05B19/05 ,  H04M1/72454

Abstract: The present disclosure relates to a method for changing a storage apparatus in the human machine interface system. The method includes recording data to a first storage apparatus connected to a human machine interface (HMI) device, receiving a selection signal for a second storage apparatus during the data recording, stopping data recording to the first storage apparatus based on the selection signal and re-performing the data recording to the second storage apparatus, and it may be applied to other exemplary embodiments.

公开(公告)号：US20230069863A1

公开(公告)日：2023-03-09

申请号：US17794150

申请日：2021-01-07

Applicant: LS ELECTRIC CO., LTD.

Inventor： Ki Hong CHOI

IPC: G05B19/05

Abstract: The present disclosure relates to a PLC device capable of variably setting parameters, the PLC device converting variable parameters into a parameter program command rather than into the parameters themselves so as to store same in a program memory, thereby enabling parameter values to be actively changed according to changes in sensor values of factory equipment.

公开(公告)号：US20230064311A1

公开(公告)日：2023-03-02

申请号：US17797239

申请日：2021-01-05

Applicant: LS ELECTRIC CO., LTD.

Inventor： Sungjun TAK

IPC: H02B1/16 ,  H05K7/14 ,  H05K5/02 ,  H02B1/20

Abstract: A sub-module is disclosed. A sub-module according to an embodiment of the present invention comprises a short-circuiting control part. The short-circuiting control part comprises a movable member slidably coupled to a frame on which capacitor assemblies are seated. A variable connector is coupled to the movable member. Moreover, a plurality of short-circuiting blocks are arranged on the frame while being spaced away from each other. When the movable member has slid, the variable connector comes into contact with one or more short-circuiting blocks adjacent to each other to be electrically conductive. The short-circuiting blocks are connected to the capacitor assemblies, respectively, to be electrically conductive. Therefore, a plurality of capacitor elements can be short-circuited simultaneously only by moving the movable member.

公开(公告)号：US11574784B2

公开(公告)日：2023-02-07

申请号：US17269213

申请日：2019-08-13

Applicant: LS ELECTRIC CO., LTD.

Inventor： Jungwoo Yoo

IPC: H01H3/00 ,  H01H50/56 ,  H01H50/18 ,  H01H50/36 ,  H01H50/54

Abstract: The present disclosure relates to a direct current relay, and more specifically, to a direct current relay having a movable assembly with improved contact pressure. The direct current relay according to an embodiment of the present disclosure comprises a pair of fixed contacts, and a movable contact which is moved vertically by an electromagnetic force to contact or be separated from the pair of fixed contacts, wherein an upper yoke and a lower yoke are respectively provided on the upper and lower portions of the movable contact, a contact spring is provided on the lower portion of the lower yoke, and the lower yoke is pressed by the contact spring to move the movable contact.

公开(公告)号：US20230020449A1

公开(公告)日：2023-01-19

申请号：US17784934

申请日：2020-04-02

Applicant: LS ELECTRIC CO., LTD.

Inventor： Ho Young KANG

IPC: G06Q30/02 ,  G06Q40/08

Abstract: The present disclosure relates to a device that calculates a fire insurance premium discount rate applied to a distribution board so as to provide the same to an insurance company server, and provides a device for calculating a fire insurance premium discount rate for a distribution board, comprising: a control unit for receiving distribution board information from the distribution board and controlling the distribution board; and a discount rate calculation unit for receiving, from the insurance company server, fire insurance premium information applied to the distribution board, and calculating a discount rate of the fire insurance premium on the basis of the distribution board information and the fire insurance premium information.

公开(公告)号：US20230020170A1

公开(公告)日：2023-01-19

申请号：US17756943

申请日：2020-04-01

Applicant: LS ELECTRIC CO., LTD.

Inventor： Han-Joo LEE ,  Hong-Ik YANG

IPC: H02B1/14 ,  H02B1/04

Abstract: The present invention disclosure provides a switchboard having a rotating shutter structure. The switchboard having a rotating shutter structure comprises: a switchboard body that is provided with a circuit breaker chamber into which a circuit breaker is inserted, and an open hole formed in the rear surface to expose a conductor part of a bushing assembly to the circuit breaker chamber; a shutter part that is rotatably installed in the switchboard body and opens/closes the open hole by rotating; and an operation unit that is installed in the switchboard body and rotates the shutter part when the circuit breaker is inserted into the circuit breaker chamber.

公开(公告)号：US20230005683A1

公开(公告)日：2023-01-05

申请号：US17756883

申请日：2020-04-09

Applicant: LS ELECTRIC CO., LTD.

Inventor： Jungwoo YOO

IPC: H01H33/18 ,  H01H33/53

Abstract: An arc path formation unit and a direct current relay are disclosed. The arc path formation unit according to an embodiment of the present disclosure comprises a plurality of magnet parts. Each magnet part is arranged adjacent to a plurality of fixed contacts. Opposing surfaces of the plurality of magnet parts located adjacent to one fixed contact and facing each other, the opposing surfaces facing each other, and opposing surfaces of the magnet parts located adjacent to another fixed contact, the opposing surfaces facing each other, are configured to have the same polarity. Accordingly, electromagnetic forces formed in the fixed contacts are formed in a direction away from each other and away from a central portion. Accordingly, damage to each configuration of the arc path formation unit and the direct current relay caused by a generated arc can be minimized.

公开(公告)号：US11482963B2

公开(公告)日：2022-10-25

申请号：US17293631

申请日：2019-08-07

Applicant: LS ELECTRIC CO., LTD.

Inventor： Seung-Cheol Choi ,  Hak-Jun Lee

IPC: H02P27/08 ,  H02P21/18 ,  H02P21/22 ,  H02M7/5395

Abstract: The present disclosure provides an inverter control device for estimating the magnetic flux of a rotor, and calculating and compensating for a slip frequency on the basis of a torque current and a magnetic flux current, to control the speed of an electric motor. To this end, the present invention may comprise: a command voltage generation unit for outputting a three-phase PWM voltage with respect to a command frequency to an inverter on the basis of voltage/frequency operation; and a slip frequency determination unit for determining a slip frequency on the basis of the phase current and phase voltage of an electric motor driven by the inverter.

公开(公告)号：US11476702B2

公开(公告)日：2022-10-18

申请号：US17275019

申请日：2019-09-11

Applicant: LS ELECTRIC CO., LTD.

Inventor： Jihong Kim ,  Kwangkyu Hwang ,  Dohyun Kim ,  Minjun Park

IPC: H02J9/06 ,  H02J3/38 ,  H02H1/00 ,  H02H7/26

Abstract: The present specification relates to an uninterruptible power supply device, an uninterruptible power supply system and a method for controlling the uninterruptible power supply system, and relates to a power supply device comprising a circuit breaker for switching connection to a power bus, thereby controlling the reception and supply of the power by opening and closing the circuit breaker according to various situations occurring in a system, a power supply system and a method for controlling the power supply system.

公开(公告)号：US11456140B2

公开(公告)日：2022-09-27

申请号：US17291724

申请日：2019-08-19

Applicant: LS ELECTRIC CO., LTD.

Inventor： Youngmo Yang ,  Sunggyu Nam

IPC: H01H3/02 ,  H01H3/16 ,  H01H3/32 ,  H02H3/33 ,  H01H83/02 ,  H02H3/02 ,  H02H3/16

Abstract: The present disclosure relates to an earth leakage circuit breaker and a method for controlling the same. The earth leakage breaker includes a zero-phase current detection unit for detecting a zero-phase current generated in a zero current transformer formed in three-phase electrical lines; a voltage detection unit for detecting a voltage from each of the two electrical lines; a trip unit for tripping contact points between the two electrical lines and a single-phase load when a trip signal is inputted; and a control unit which, when the zero-phase current is detected by the zero-phase current detection unit, detects an electrical line in which the voltage has dropped by a predetermined level or more, and generates and outputs the trip signal to the trip unit when the electrical line in which the voltage has dropped by a predetermined level or more exists.