公开(公告)号：US20180226881A1

公开(公告)日：2018-08-09

申请号：US15741227

申请日：2016-06-30

Applicant: LG ELECTRONICS INC.

Inventor： Seungwoo CHAE ,  Sanghyeon KIM ,  Jeongeon OH

IPC: H02M1/14 ,  H02M3/158 ,  F24F11/62 ,  F24F11/46 ,  H02M1/42

Abstract: The present invention relates to a power conversion device and an air conditioner comprising the same. The power conversion device according to one embodiment of the present invention comprises: an interleaved boost converter; a dc terminal capacitor connected to an output terminal of the interleaved boost converter; a load connected to the dc terminal capacitor; and a controller for controlling the interleaved boost converter, wherein the controller controls the phase difference between a first boost converter and second boost converter of the interleaved boost converter so that the phase difference is a first phase difference in a first mode, and if a current ripple flowing in the dc terminal capacitor is a predetermined value or greater, the controller enters a second mode and controls the phase difference between the first boost converter and second boost converter of the interleaved boost converter so that the phase difference varies. Accordingly, the ripple current flowing into a capacitor disposed at the output terminal of an interleaved boost converter can be reduced.

公开(公告)号：US20220220966A1

公开(公告)日：2022-07-14

申请号：US17570910

申请日：2022-01-07

Applicant: LG Electronics Inc.

Inventor： Yonghwa LEE ,  Sanghyeon KIM ,  Jeongeon OH

IPC: F04D25/06 ,  H02M1/08 ,  H02M3/158

Abstract: The present disclosure relates to a motor driving apparatus and an air conditioner including the same. The motor driving apparatus and the air conditioner including the same according to an embodiment of the present disclosure include: a switching device disposed between an inverter and a motor; and a controller, which in response to windings of the motor being switched from a first connection to a second connection, controls an operating frequency of the motor to be less than or equal to a first frequency, and in response to the windings of the motor being switched from the second connection to the first connection, controls an operating frequency of the motor to be less than or equal to a second frequency which is less than the first frequency. Accordingly, burnout of the switching device for switching connection of the motor windings may be prevented.

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：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：US20200021102A1

公开(公告)日：2020-01-16

申请号：US16509894

申请日：2019-07-12

Applicant: LG Electronics Inc.

Inventor： Kiman KIM ,  Sanghyeon KIM ,  Taekyoung KIM ,  Yongsoo CHO

IPC: H02H7/085 ,  H02M7/5387 ,  H02P27/08 ,  H02M1/08 ,  H02M1/44 ,  H02H1/00

Abstract: The present invention relates to a power converting device, and more particularly, to a power converting device capable of protecting a compressor from overheat, a compressor including the same, and a control method thereof. The device includes an inverter for generating an alternate current for driving the motor using power supplied from a power supply, the inverter including a plurality of switching elements; a driver for driving the plurality of switching elements; a variable resistance unit disposed between and electrically coupled to the driver and a gate of each of the switching elements, wherein the variable resistance unit has a resistance value inversely proportional to a temperature of the inverter; and a controller configured for transferring a drive signal to the driver.

公开(公告)号：US20180152108A1

公开(公告)日：2018-05-31

申请号：US15821967

申请日：2017-11-24

Applicant: LG ELECTRONICS INC.

Inventor： Sanghyeon KIM ,  Taeyoung Park ,  Jeongeon Oh

IPC: H02M3/335 ,  H02M1/08 ,  H01F27/28 ,  H01F27/24 ,  H05K1/18 ,  H05K1/09 ,  H05K1/16

CPC classification number: H02M3/335 ,  H01F27/24 ,  H01F27/2804 ,  H01F2027/2809 ,  H02M1/08 ,  H02M3/1584 ,  H02M2001/0058 ,  H02M2003/1586 ,  H05K1/09 ,  H05K1/165 ,  H05K1/18 ,  H05K2201/10015 ,  Y02B70/1425 ,  Y02B70/1491

Abstract: Provided are a power converting system and a power converting apparatus, which include an input unit that receives a direct current (DC) voltage from an external power source, a conversion unit including a plurality of switching circuits that convert the input DC voltage into a multi-phase AC voltage, a resonant unit including a single resonant inductor connected to each of the plurality of switching circuits, and an output unit that rectifies each phase of the multi-phase AC voltage which has been converted in the plurality of switching circuits and outputs a single DC voltage.