公开(公告)号：US12176839B2

公开(公告)日：2024-12-24

申请号：US17790690

申请日：2020-03-20

Applicant: LG ELECTRONICS INC.

Inventor： Suntae Kim ,  Bohwan Seo ,  Jiyoun Jeong ,  Seungjoo Lee

IPC: H02P27/06 ,  H02P21/10 ,  H02P25/22 ,  H02P27/08 ,  H02P29/50

Abstract: A motor assembly may include a stator; a first inverter unit for controlling a three-phase alternating current which is applied to a first coil in order to generate a rotation magnetic field; and a second inverter unit for controlling a three-phase alternating current which is applied to a second coil in order to generate a rotation magnetic field. Control signals for turning on and off the three-phase alternating currents applied to the first coil and the second coil are generated so as to be left-right symmetric by the first inverter unit and the second inverter unit during a preset switching cycle.

公开(公告)号：US11689144B2

公开(公告)日：2023-06-27

申请号：US17542015

申请日：2021-12-03

Applicant: LG Electronics Inc.

Inventor： Kyungmin Kim ,  Bohwan Seo ,  Seungjoo Lee ,  Jiyoun Jeong

IPC: H02P29/024 ,  F24F11/88 ,  H02M3/335 ,  F16C32/04 ,  H02P27/08

CPC classification number: H02P29/024 ,  F16C32/0451 ,  F24F11/88 ,  H02M3/33573 ,  H02P27/08

Abstract: A power transforming apparatus for supplying power to a motor having a magnetic bearing includes: a converter configured to, in an initial operation, receive AC power, and an auxiliary circuit performing initial charging by rectifying the AC power to a second power and supplying the rectified second power to an inverter controller and a magnetic bearing controller. The inverter controller outputs a signal to an inverter using the second power and controls the inverter to supply a rectified DC voltage to the converter, and the converter is configured to, during a normal operation, stop supplying the second power to the inverter controller and control the rectified DC voltage to be supplied to the inverter controller and the magnetic bearing controller, and, based on a power failure being detected, outputs a control signal such that the second power is supplied to the inverter controller and the magnetic bearing controller.