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：US20210021275A1

公开(公告)日：2021-01-21

申请号：US16878825

申请日：2020-05-20

Applicant: LG Electronics Inc.

Inventor： Yongsoo CHO ,  Taekyoung KIM ,  Sanghoon NAM ,  Namsik YIM

IPC: H03M1/10

Abstract: A control apparatus that controls a resolution according to a signal of a motor is provided. The apparatus comprises a measurement unit configured to measure a voltage and an electric current of the signal, an amplification unit comprising a first variable resistor, and a micro control unit (MCU) comprising first, second, and third lookup tables. The amplification unit is configured to amplify the signal according to a first gain corresponding to a resistance value and generate an output signal. The MCU is configured to set the resolution, divide the signal, generate the output signal, set a measurement range corresponding to a first gain, and control the resistance value. The MCU is configured to control the resistance value according to a comparison between the set measurement range, comprising a range of voltages proportional to a magnitude of the gain, and a range of possible measurement set corresponding to the signal.

公开(公告)号：US20200080556A1

公开(公告)日：2020-03-12

申请号：US16516598

申请日：2019-07-19

Applicant: LG ELECTRONICS INC.

Inventor： Bumjune SEO ,  Ochang GWON ,  Yongsoo CHO ,  Jongtae HER

IPC: F04C18/02 ,  F04D17/10

Abstract: A motor-operated compressor includes a compression unit including a compression chamber formed by a plurality of scrolls engaged with each other. The compressor includes a rotation shaft having one end coupled to one of the scrolls and a rotor coupled with another end of the rotation shaft. The compressor includes a stator radially separated from the rotor by a predetermined gap. The compressor includes a casing having a motor chamber. The stator is inserted in the motor chamber and divides the motor chamber into a first space and a second space. The casing includes an inlet port coupled to the first space to guide a refrigerant toward the motor chamber. The casing also includes a suction guide passage coupled to the second space to guide the refrigerant sucked through the inlet port toward the compression unit. A communication passage portion in the rotation shaft communicates the first and second spaces.

公开(公告)号：US20220205673A1

公开(公告)日：2022-06-30

申请号：US17563492

申请日：2021-12-28

Applicant: LG Electronics Inc.

Inventor： Yonghwa LEE ,  Yongsoo CHO ,  Jeongeon OH

IPC: F24F11/88 ,  F24F11/38 ,  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.