公开(公告)号：US11362601B2

公开(公告)日：2022-06-14

申请号：US16988329

申请日：2020-08-07

Applicant: LG Electronics Inc.

Inventor： Sunku Kwon ,  Chaseung Jun ,  Sehwa Choe ,  Wookjin Lee

IPC: H02P5/46 ,  H02P5/74 ,  H02P7/06 ,  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：US11329578B2

公开(公告)日：2022-05-10

申请号：US16987628

申请日：2020-08-07

Applicant: LG ELECTRONICS INC.

Inventor： Sunku Kwon ,  Chaseung Jun ,  Sehwa Choe ,  Wookjin Lee

IPC: H02P21/24 ,  H02P5/50 ,  H02P21/22

Abstract: A device for driving a plurality of motors and an electric apparatus having the same is disclosed. The device includes an inverter connected to a DC terminal, a multi-phase motor connected to the inverter, a single-phase motor serially connected to the multi-phase motor, and a first capacitor and a second capacitor connected in series between a first end and a second end of the DC terminal, wherein the single-phase motor is connected to the multi-phase motor, and a node between the first capacitor and the second capacitor. Accordingly, a plurality of motors serially connected with each other can be driven by using a single inverter.

公开(公告)号：US11323048B2

公开(公告)日：2022-05-03

申请号：US17087789

申请日：2020-11-03

Applicant: LG ELECTRONICS INC.

Inventor： Sunku Kwon ,  Chaseung Jun ,  Jaehoon Jeong ,  Sehwa Choe ,  Wookjin Lee

IPC: H02P1/54 ,  H02P5/505

Abstract: A device for driving a plurality of motors and an electric apparatus includes a first and a second capacitor, an inverter connected to a DC terminal, a multi-phase motor connected to the inverter, a single-phase motor serially connected with the multi-phase motor, and a controller configured to control the inverter. For starting the single phase motor during operation of the multi-phase motor, the controller is configured to perform, during an alignment period, an alignment of a rotor of the single-phase motor and perform, during a voltage compensation period, a voltage compensation for compensating a voltage change of a DC terminal neutral point between the first capacitor and the second capacitor based on the alignment of the rotor of the single-phase motor.

公开(公告)号：US11705832B2

公开(公告)日：2023-07-18

申请号：US17744303

申请日：2022-05-13

Applicant: LG Electronics Inc.

Inventor： Sunku Kwon ,  Chaseung Jun ,  Sehwa Choe ,  Wookjin Lee

IPC: H02P8/00 ,  H02P5/50 ,  H02P21/22

CPC classification number: H02P5/50 ,  H02P21/22 ,  H02P2201/03 ,  H02P2209/01

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：US20210044224A1

公开(公告)日：2021-02-11

申请号：US16987628

申请日：2020-08-07

Applicant: LG ELECTRONICS INC.

Inventor： Sunku Kwon ,  Chaseung Jun ,  Sehwa Choe ,  Wookjin Lee

IPC: H02P5/50

Abstract: A device for driving a plurality of motors and an electric apparatus having the same is disclosed. The device includes an inverter connected to a DC terminal, a multi-phase motor connected to the inverter, a single-phase motor serially connected to the multi-phase motor, and a first capacitor and a second capacitor connected in series between a first end and a second end of the DC terminal, wherein the single-phase motor is connected to the multi-phase motor, and a node between the first capacitor and the second capacitor. Accordingly, a plurality of motors serially connected with each other can be driven by using a single inverter.