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：US11177758B2

公开(公告)日：2021-11-16

申请号：US16661844

申请日：2019-10-23

Applicant: LG ELECTRONICS INC.

Inventor： Yonghwa Lee

IPC: H02P21/24 ,  H02P27/08 ,  F24F11/86 ,  F24F11/46 ,  H02P23/14 ,  H02P25/18 ,  H02P27/04

Abstract: The present disclosure relates to an apparatus and method for controlling switching of a wiring mode of a motor capable of being operated in a plurality of wiring modes, a motor control apparatus includes a motor including a rotor that rotates according to a motor torque by a pulse width modulation (PWM) control, a switching unit provided at the motor and switching a wiring method inside the motor so that the motor is driven according to another wiring mode, and a controller generating a speed command frequency for controlling a rotation speed of the rotor, and controlling the switching unit so that the wiring mode of the motor is switched according to a result of comparing the speed command frequency with a switching boundary frequency according to the wiring mode of the motor, wherein when the PWM control is stopped in response to the switching of the wiring mode, the controller estimates a rotation state of the rotor that rotates inertially, and when the PWM control is restarted, the controller sets the estimated rotation state of the rotor as an initial value of the rotor, and controls a rotation speed of the motor of which the wiring mode is switched based on the set initial value of the rotor.

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：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.