公开(公告)号：US12163688B2

公开(公告)日：2024-12-10

申请号：US17563492

申请日：2021-12-28

Applicant: LG Electronics Inc.

Inventor： Yonghwa Lee ,  Yongsoo Cho ,  Jeongeon Oh

IPC: F24F11/38 ,  F24F11/88 ,  F24F11/89

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, wherein while windings of the motor are connected in a first connection, an output current at a first level is output from the inverter, and while the windings of the motor are connected in a second connection, the output current at the first level is output from the inverter, such that it is possible to determine whether the switching device for switching connection of the motor is abnormal.

公开(公告)号：US10516331B2

公开(公告)日：2019-12-24

申请号：US15741227

申请日：2016-06-30

Applicant: LG ELECTRONICS INC.

Inventor： Seungwoo Chae ,  Sanghyeon Kim ,  Jeongeon Oh

IPC: H02M1/14 ,  H02M7/06 ,  H02J3/38 ,  F24F3/00 ,  H02M3/158 ,  F24F11/62 ,  F24F11/46 ,  H02M1/42 ,  H02M5/44 ,  F24F11/88

Abstract: The present invention relates to a power conversion device and an air conditioner comprising the same. The power conversion device may include: an interleaved boost converter; a dc terminal capacitor; a load; 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 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：US11923797B2

公开(公告)日：2024-03-05

申请号：US17574879

申请日：2022-01-13

Applicant: LG Electronics Inc.

Inventor： Yonghwa Lee ,  Songhee Yang ,  Jeongeon Oh

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

CPC classification number: H02P29/028 ,  F24F1/20 ,  H02P27/085

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：US10587182B2

公开(公告)日：2020-03-10

申请号：US15739925

申请日：2016-06-24

Applicant: LG ELECTRONICS INC.

Inventor： Kyeongtae Kim ,  Yonghwa Lee ,  Jeongeon Oh

IPC: H02M1/12 ,  H02M1/14 ,  H02M3/156 ,  H02M7/48 ,  H02M1/15 ,  H02M1/42 ,  F24F11/88 ,  H02M7/5395 ,  F24F11/89 ,  H02M3/07 ,  H02M5/451 ,  H02M3/158 ,  H02M5/458 ,  H02M1/00 ,  H01F30/12

Abstract: The power conversion device may include a rectification unit, a boost converter for boosting power rectified from the rectification unit, a dc-end capacitor connected to an output end of the boost converter, an inductor current detection unit for detecting an inductor current flowing in an inductor within the boost converter, a dc-end voltage detection unit for detecting voltages of both ends of the dc-end capacitor, and a control unit for controlling the boost converter. The control unit may generate and output a converter switching control signal by performing proportional resonant control for a duty command value of a switching element within the boost converter, based on the detected inductor current and dc-end voltage. Therefore, a harmonic current component flowing through a dc-end capacitor induced by a ripple component of an input voltage may be reduced.

公开(公告)号：US10411623B2

公开(公告)日：2019-09-10

申请号：US15855012

申请日：2017-12-27

Applicant: LG ELECTRONICS INC.

Inventor： Yonghwa Lee ,  Donggeun Lee ,  Jeongeon Oh

IPC: H02M7/5387 ,  H02P6/08 ,  H02P6/18 ,  H02P27/06 ,  H02P6/17 ,  H02P27/08 ,  H02P21/24

Abstract: Provided are a motor control device and a method for controlling a motor control device. A switching frequency is varied with respect to a control sampling for controlling an inverter, whereby controlling is performed by securing a required control sampling according to a motor speed.

公开(公告)号：US10389252B2

公开(公告)日：2019-08-20

申请号：US15821967

申请日：2017-11-24

Applicant: LG ELECTRONICS INC.

Inventor： Sanghyeon Kim ,  Taeyoung Park ,  Jeongeon Oh

IPC: H02M3/335 ,  H01F27/24 ,  H01F27/28 ,  H02M1/08 ,  H05K1/09 ,  H05K1/16 ,  H05K1/18 ,  H02M3/158 ,  H02M1/00

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.

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.

公开(公告)号：US10651768B2

公开(公告)日：2020-05-12

申请号：US16523468

申请日：2019-07-26

Applicant: LG ELECTRONICS INC.

Inventor： Yonghwa Lee ,  Donggeun Lee ,  Jeongeon Oh

IPC: H02M7/5387 ,  H02P6/17 ,  H02P6/18 ,  H02P21/24 ,  H02P27/08

Abstract: Provided are a motor control device and a method for controlling a motor control device. A switching frequency is varied with respect to a control sampling for controlling an inverter, whereby controlling is performed by securing a required control sampling according to a motor speed.

公开(公告)号：US10447258B2

公开(公告)日：2019-10-15

申请号：US15848826

申请日：2017-12-20

Applicant: LG ELECTRONICS INC.

Inventor： Seungwoo Chae ,  Sanghyeon Kim ,  Jeongeon Oh

IPC: H03K17/08 ,  H03K17/082 ,  H03K17/14 ,  G01R19/00 ,  H03K17/567

Abstract: A circuit and a system may drive switching modules. The driving circuit and system are capable of controlling a detection level of a protection voltage of a switching module, by controlling a voltage of a detection circuit for detecting the protection voltage. This may be done based on control of a variable resistance.

公开(公告)号：US20180183425A1

公开(公告)日：2018-06-28

申请号：US15848826

申请日：2017-12-20

Applicant: LG ELECTRONICS INC.

Inventor： Seungwoo CHAE ,  Sanghyeon Kim ,  Jeongeon Oh

IPC: H03K17/08 ,  H03K17/567 ,  G01R19/00

CPC classification number: H03K17/08 ,  G01R19/0092 ,  H03K17/0828 ,  H03K17/14 ,  H03K17/567 ,  H03K2217/0027

Abstract: A circuit and a system may drive switching modules. The driving circuit and system are capable of controlling a detection level of a protection voltage of a switching module, by controlling a voltage of a detection circuit for detecting the protection voltage. This may be done based on control of a variable resistance.