公开(公告)号：US20220085744A1

公开(公告)日：2022-03-17

申请号：US17295217

申请日：2019-01-07

Applicant: LG ELECTRONICS INC.

Inventor： Jungdae LEE ,  Sanggi KO ,  Jaeyoon OH ,  Gilsu LEE

IPC: H02P27/06 ,  H02M1/14

Abstract: The present specification relates to a motor control device, a motor control system, and a motor control method. The motor control device measures a ripple voltage of a DC link capacitor to determine an appropriate switching frequency according to the ripple voltage, and causes a plurality of arithmetic processing units to selectively control a switching operation of the switching unit according to the determined switching frequency.

公开(公告)号：US20240133614A1

公开(公告)日：2024-04-25

申请号：US18278065

申请日：2022-02-23

Applicant: LG ELECTRONICS INC.

Inventor： Sang Chul HAN ,  Jin Woo PARK ,  Jaeyoon OH

IPC: F25D23/02

CPC classification number: F25D23/028 ,  F25D2327/001 ,  F25D2400/18

Abstract: A refrigerator door includes a color module which displays various colors by using LEDs. Accordingly, when a consumer desires to change the color of the refrigerator door, the color of the refrigerator door can be changed to color desired by the consumer.

公开(公告)号：US20240230207A9

公开(公告)日：2024-07-11

申请号：US18278065

申请日：2022-02-23

Applicant: LG ELECTRONICS INC.

Inventor： Sang Chul HAN ,  Jin Woo PARK ,  Jaeyoon OH

IPC: F25D23/02

CPC classification number: F25D23/028 ,  F25D2327/001 ,  F25D2400/18

Abstract: A refrigerator door includes a color module which displays various colors by using LEDs. Accordingly, when a consumer desires to change the color of the refrigerator door, the color of the refrigerator door can be changed to color desired by the consumer.