公开(公告)号：US20230039050A1

公开(公告)日：2023-02-09

申请号：US17790690

申请日：2020-03-20

Applicant: LG ELECTRONICS INC.

Inventor： Suntae KIM ,  Bohwan SEO ,  Jiyoun JEONG ,  Seungjoo LEE

IPC: H02P29/50 ,  H02P25/22 ,  H02P27/08

Abstract: The present disclosure relates to a motor assembly and a method for controlling the motor assembly. The motor assembly is characterized by comprising: a stator having a plurality of slots; a first coil and a second coil isolated from the first coil, the first and second coils being wound on each of the plurality of slots such that three-phase alternating currents are applied thereto; a rotor rotated by rotation magnetic fields generated by the first coil and the second coil; a first inverter unit for controlling the three-phase alternating current which is applied to the first coil in order to generate the rotation magnetic field; and a second inverter unit for controlling the three-phase alternating current which is applied to the second coil in order to generate the 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：US20220345067A1

公开(公告)日：2022-10-27

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 ,  H02P27/08 ,  H02M3/335 ,  F24F11/88 ,  F16C32/04

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.