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公开(公告)号：US12068705B2
公开(公告)日：2024-08-20
申请号：US17440515
申请日：2019-08-13
Applicant: LS ELECTRIC CO., LTD.
Inventor： Byung Geuk Cho
IPC: H02P27/08 , H02M7/5395 , H02P25/026
CPC classification number: H02P27/08 , H02M7/5395 , H02P25/026
Abstract: An apparatus and a method for inverter control are disclosed. A method according to an embodiment of the present disclosure comprises: discretizing, in a continuous time domain, a voltage equation for a motor in a stationary coordinate system in which a zero-order hold and time delay is reflected; and determining a voltage equation for the motor in a synchronous coordinate system in a discrete time domain by reflecting the position and speed of a rotor of the motor.
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公开(公告)号：US20240255547A1
公开(公告)日：2024-08-01
申请号：US18282935
申请日：2022-03-14
Applicant: LS ELECTRIC CO., LTD.
Inventor： Jeong Woo LIM
IPC: G01R15/14
CPC classification number: G01R15/146
Abstract: The present invention relates to a current measuring device comprising: a plurality of unit modules which are provided with mutually different grounds and are connected in series; a power unit which supplies high-voltage DC or AC power to the plurality of unit modules via a line; and a current sensor which measures a current flowing through the line.
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公开(公告)号：US20240250510A1
公开(公告)日：2024-07-25
申请号：US17640640
申请日：2020-03-12
Applicant: LS ELECTRIC CO., LTD.
Inventor： E. Jae CHOI
Abstract: The present invention relates to a device for lifting a circuit breaker of a switchgear, the device comprising: a rail part that is located above the switchgear and has a plurality of vertically arranged compartments; an elevating part that can be guided and move above the rail part, and lifts the circuit breaker; and a lifting bracket that is fixed to two facing side surfaces of the circuit breaker, is coupled to a hook block of the elevating part, and moves up and down according to the actions of the elevating part.
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公开(公告)号：US12027923B2
公开(公告)日：2024-07-02
申请号：US17433279
申请日：2019-07-11
Applicant: LS ELECTRIC CO., LTD.
Inventor： Min Hun Chi , Chun Suk Yang
CPC classification number: H02K11/33 , H05K5/0026 , H02K2211/03
Abstract: The present disclosure relates to a device for driving a motor, including a lower case having an accommodating space formed therein and an open upper side; an upper case closing an open surface of the lower case to form an inner space; a central case disposed in the lower case to partition an inner space formed by the lower case and the upper case; a first board disposed on the lower case and comprising a first connector; a second board disposed on the central case and comprising a second connector; and a connection board disposed in the inner space and comprising a first connection connector electrically connected to the first connector and a second connection connector electrically connected to the second connector to transmit electric signals between the board.
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公开(公告)号：US12027913B2
公开(公告)日：2024-07-02
申请号：US18014303
申请日：2021-06-30
Applicant: LS ELECTRIC CO., LTD.
Inventor： Tae Hee Han , Ji Hong Kim , Ji Heon Lee , Hee Jung Kim
CPC classification number: H02J9/062 , H02M1/0054 , H02M1/0077 , H02M7/219
Abstract: A power conversion device for controlling a DC voltage of a DC link may comprise a first diode, a second diode, a first switching element, a second switching element, a third switching element, and a fourth switching element, wherein: a cathode terminal of the first diode is connected to a positive terminal of the DC link; an anode terminal of the first diode is connected to one end of the first switching element and one end of the third switching element; the other end of the first switching element is connected to an alternating current terminal and one end of the second switching element; the other end of the second switching element is connected to one end of the second diode and one end of the fourth switching element; the other end of the second diode is connected to a negative terminal of the DC link.
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Patent Agency Ranking
公开(公告)号：US12009642B2
公开(公告)日：2024-06-11
申请号：US17916715
申请日：2021-03-29
Applicant: LS ELECTRIC CO., LTD.
Inventor： Young Kim , Min-Kyu Seo
IPC: H02B1/36 , H02B11/133 , H02B11/167
CPC classification number: H02B1/36 , H02B11/133 , H02B11/167
Abstract: A power device for continuously detecting entry and exit positions. The power device comprises: a cradle having a cradle terminal formed therein; a breaker main body mechanically and electrically connected to or separated from the cradle terminal; and a girder and a truck which are transfer devices for moving the breaker main body to a connection or separation position, wherein the power device comprises: a position detection area portion formed on a side surface of the breaker main body; and a sensor module provided with a non-contact sensor which faces the position detection area portion and detects the position of the breaker main body by sensing a moving position of the position sensing area portion, the sensor module being fixedly coupled to the inner surface of the cradle.
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公开(公告)号：US20240118143A1
公开(公告)日：2024-04-11
申请号：US18039464
申请日：2021-11-24
Applicant: LS ELECTRIC CO., LTD.
Inventor： Yong Gak SIN
CPC classification number: G01K7/13 , G01K1/026 , G01K7/24 , G01K2219/00
Abstract: The present invention relates to a multichannel thermocouple measurement device, which may comprise: a thermocouple-thermistor pair; a terminal to which an analog signal of the thermocouple-thermistor pair is input; and a detection unit which converts the analog signal of the thermocouple-thermistor pair, input via the terminal, into a digital signal.
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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
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.
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公开(公告)号：US11894763B2
公开(公告)日：2024-02-06
申请号：US17432695
申请日：2019-07-11
Applicant: LS ELECTRIC CO., LTD.
Inventor： Jin Kyu Yang
IPC: H02M1/32 , H02H7/122 , H02M7/5395
CPC classification number: H02M1/32 , H02H7/1222 , H02M7/5395
Abstract: An inverter protection device is disclosed. An inverter protection device, which determines whether or not a pulse-width modulation (PWM) control signal provided to an inverter unit of an inverter is blocked in accordance with a voltage signal received from first and second switches of a safety relay which are parallelly connected, comprises: a first power switch which is switched to an on-state by means of a first voltage signal applied from the first switch; a second power switch which is switched to an on-state by means of a second voltage signal applied from the second switch; and a buffer unit which is on-off controlled in accordance with an output current of the first and second power switches and provides the PWM control signal to the inverter unit.
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公开(公告)号：US20240021389A1
公开(公告)日：2024-01-18
申请号：US18035471
申请日：2021-11-02
Applicant: LS ELECTRIC CO., LTD.
Inventor： Jung Woo YOO
Abstract: Disclosed are a movable contact part and a direct current relay comprising the same. The movable contact part, according to one embodiment of the present disclosure, comprises a coupling part which is provided to each component. The coupling part provided to each component is coupled to the coupling part provided to another adjacently positioned component.
Thus, a coupled state between each of the components constituting the movable contact part may be easily and stably formed.
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