公开(公告)号：US20240204700A1

公开(公告)日：2024-06-20

申请号：US18485818

申请日：2023-10-12

Applicant: LG Electronics Inc.

Inventor： Bohwan SEO ,  Daejoong KIM ,  Daihyun KIM

IPC: H02P3/22 ,  D06F33/46 ,  D06F33/47 ,  D06F34/08 ,  D06F39/30 ,  H02K11/33 ,  H02M1/00 ,  H02P27/08 ,  D06F103/46

CPC classification number: H02P3/22 ,  D06F33/46 ,  D06F33/47 ,  D06F34/08 ,  D06F39/30 ,  H02K11/33 ,  H02M1/0009 ,  H02P27/085 ,  D06F2103/46 ,  H02P2201/13

Abstract: A motor driving device includes a direct current (DC) link capacitor configured to store DC power, and an inverter configured to convert the DC power stored in the DC link capacitor into AC power and supply the AC power to a motor. The motor driving device includes a shunt resistor configured to sense current flowing through the inverter and detect whether the current has reached threshold current for controlling a regenerative voltage during a braking operation. A control unit is configured to control an operation of the inverter and perform a regenerative operation when the braking operation is started. The control unit, during the regenerative operation, switches motive power of a drum connected to the motor into regenerative energy and transmit the regenerative energy to the DC link capacitor, by controlling active component current and reactive component current together in response to the reaching of the threshold current.

公开(公告)号：US20220263428A1

公开(公告)日：2022-08-18

申请号：US17625620

申请日：2020-07-07

Applicant: LG Electronics Inc.

Inventor： Daejoong KIM ,  Daihyun KIM ,  Seungwook HYUN

IPC: H02M7/48 ,  H02M3/335 ,  H02M1/12 ,  H02J3/38 ,  H02M7/5387

Abstract: The present disclosure relates to a power converting apparatus and a photovoltaic module including the same. The power converting apparatus according to an embodiment of the present disclosure includes: an inverter configured to convert input DC power into AC power by a switching operation; an output voltage detector configured to detect an output voltage of the inverter; and a controller configured to control the inverter, wherein the controller is configured to perform proportional resonant control based on the output voltage, and output a switching control signal to the inverter based on the proportional resonant control. Accordingly, it is possible to remove harmonics generated due to connection of a nonlinear load.