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.