公开(公告)号：US20230155485A1

公开(公告)日：2023-05-18

申请号：US17952814

申请日：2022-09-26

Applicant: LG Electronics Inc.

Inventor： Sanghyeon KIM ,  Phillsik GONG ,  Jeongeon OH ,  Songhee YANG

IPC: H02M1/42 ,  F24F11/88 ,  H02P27/08 ,  H02M1/00

CPC classification number: H02M1/4225 ,  F24F11/88 ,  H02M1/0009 ,  H02P27/08 ,  H02M7/06

Abstract: The present disclosure discloses a power transforming apparatus capable of reducing a stress of a converter switch during a PFC operation, an operation method thereof, and an air conditioner including the same. To this end, the power transforming apparatus according to the present disclosure may determine the number of converters for performing the PFC operation based on a magnitude of input power and a speed of the motor. Furthermore, the PFC operation may be performed using only one converter when determining a low-load in order to improve efficiency. In addition, a target converter channel may be selected using a random function or determined to be changed using a previous operation history without specifying a target converter channel in advance at an initial stage of the PFC operation so as not to add a stress to any one converter switch.

公开(公告)号：US20230155487A1

公开(公告)日：2023-05-18

申请号：US17952832

申请日：2022-09-26

Applicant: LG Electronics Inc.

Inventor： Phillsik GONG ,  Songhee YANG ,  Jeongeon OH ,  Sanghyeon KIM

IPC: H02M1/42 ,  F04B35/04 ,  F04B49/06 ,  H02M1/00 ,  H02P27/06 ,  H02P6/08 ,  H02M1/08

CPC classification number: H02M1/4258 ,  F04B35/04 ,  F04B49/06 ,  H02M1/0009 ,  H02P27/06 ,  H02P6/08 ,  H02M1/083 ,  F04B2203/0208 ,  F04B2203/0209 ,  F04B2203/0201

Abstract: The present disclosure discloses a power transforming apparatus capable of reducing a stress of a converter switch during a PFC operation, an operation method thereof, and an air conditioner including the same. To this end, the power transforming apparatus according to the present disclosure may determine the number of converters for performing a PFC operation based on a magnitude of input power and a speed of the motor. Furthermore, target converter channels are arbitrarily selected using a random function at an initial stage of a PFC operation so as not to add a stress to a switch device of any one converter. In addition, in order to disperse a stress to all switches, phases are individually controlled to perform switching operations while changing converters that match the number of converters for performing a PFC operation in a preset cycle, for example, whenever a zero-crossing is detected.

公开(公告)号：US20220224276A1

公开(公告)日：2022-07-14

申请号：US17574879

申请日：2022-01-13

Applicant: LG Electronics Inc.

Inventor： Yonghwa LEE ,  Songhee YANG ,  Jeongeon OH

IPC: H02P29/028 ,  H02P27/08 ,  F24F1/20

Abstract: A motor driving device and an air conditioner having the same of the present disclosure limits the switching of a winding switching device when there is a possibility that the winding switching device is deteriorated, in order to increase the life of winding switching device of a motor and prevent malfunction.

公开(公告)号：US20210270511A1

公开(公告)日：2021-09-02

申请号：US17185339

申请日：2021-02-25

Applicant: LG Electronics Inc.

Inventor： Sunghwan KIM ,  Jeongeon OH ,  Yonghwa LEE ,  Songhee YANG

IPC: F25B49/02 ,  H02P27/08

Abstract: A motor driving apparatus includes: an inverter that includes a plurality of switching elements and that is configured to output AC power to a motor by a switching operation of the plurality of switching elements, a switching unit that includes a relay and that is configured to switch a connection mode of the motor by an operation of the relay, and an inverter controller configured to control the inverter and the switching unit. The inverter controller is configured to, based on the relay being turned off, apply a reverse voltage to the relay.