公开(公告)号：US20220271690A1

公开(公告)日：2022-08-25

申请号：US17744303

申请日：2022-05-13

Applicant: LG Electronics Inc.

Inventor： Sunku KWON ,  Chaseung JUN ,  Sehwa CHOE ,  Wookjin LEE

IPC: H02P5/50 ,  H02P21/22

Abstract: A device for driving a plurality of motors, including an inverter connected to a DC terminal; a multi-phase motor connected to the inverter; and a single-phase motor serially connected to the multi-phase motor, wherein a number of frequency of current input to the multi-phase motor when driving the single-phase motor and the multi-phase motor at the same speed is smaller than the number of frequency of current input to the multi-phase motor when driving the single-phase motor and the multi-phase motor at different speeds. Accordingly, a plurality of motors can be simultaneously driven at different speeds, by using a single inverter.

公开(公告)号：US20210044225A1

公开(公告)日：2021-02-11

申请号：US16988329

申请日：2020-08-07

Applicant: LG Electronics Inc.

Inventor： Sunku KWON ,  Chaseung JUN ,  Sehwa CHOE ,  Wookjin LEE

IPC: H02P5/50 ,  H02P21/22

Abstract: A device for driving a plurality of motors, including an inverter connected to a DC terminal; a multi-phase motor connected to the inverter; and a single-phase motor serially connected to the multi-phase motor, wherein a number of frequency of current input to the multi-phase motor when driving the single-phase motor and the multi-phase motor at the same speed is smaller than the number of frequency of current input to the multi-phase motor when driving the single-phase motor and the multi-phase motor at different speeds. Accordingly, a plurality of motors can be simultaneously driven at different speeds, by using a single inverter.