公开(公告)号：US20220209597A1

公开(公告)日：2022-06-30

申请号：US17524938

申请日：2021-11-12

Applicant: LG Electronics Inc.

Inventor： Inbum PARK ,  Bokann PARK ,  Chisung PARK ,  Donghyun LEE

IPC: H02K1/27 ,  H02K1/28 ,  H02K7/02 ,  F25B31/02 ,  F04B35/04 ,  F04B53/14 ,  F04B53/16

Abstract: A hermetic compressor includes an electric motor that includes a rotor having a plurality of permanent magnets inserted into a rotor core, a connection part made of a non-magnetic material and provided at an axial end portion of the rotor core, and an inertial core made of a magnetic material and provided at an axial end of the connection part. The connection part includes a plurality of first fixing portions, a plurality of second fixing portions spaced apart from the plurality of first fixing portions in an axial direction, and a plurality of link portions disposed between the plurality of first fixing portions and the plurality of second fixing portions.

公开(公告)号：US20180226850A1

公开(公告)日：2018-08-09

申请号：US15887475

申请日：2018-02-02

Applicant: LG Electronics Inc.

Inventor： Jaeho KIM ,  Byungkuk KAM ,  Chisung PARK ,  Jihyun AHN

IPC: H02K1/27 ,  H02K1/28 ,  H02K15/03

CPC classification number: H02K1/2773 ,  H02K1/2786 ,  H02K1/28 ,  H02K15/03

Abstract: A motor includes a stator, a rotor including an outer rotor core that includes a plurality of magnets arranged along a circumferential direction of the rotor, an inner rotor core that is located radially inward of the outer rotor core and that defines a shaft hole configured to receive a shaft, and an inner connecting portion that connects the outer rotor core to the inner rotor core and that is located at a central axis of a magnet from among the plurality of magnets. The inner connecting portion includes a radial rib that extends from the inner rotor core radially outward toward the outer rotor core, and an extension rib that extends from an outer end of the radial rib in the circumferential direction and that defines an angle with respect to the radial rib that is greater than or equal to 90 degrees.

公开(公告)号：US20210211002A1

公开(公告)日：2021-07-08

申请号：US17039463

申请日：2020-09-30

Applicant: LG ELECTRONICS INC.

Inventor： Chisung PARK ,  Sangjoon EUM ,  Gyujong JEONG

IPC: H02K1/27 ,  H02K21/14 ,  F25B31/02 ,  F04D25/06 ,  F04D29/40

Abstract: An electric motor and a compressor having an electric motor. The electric motor may include a stator, and a rotor provided with a rotational shaft, a rotor core coupled to the rotational shaft, and permanent magnets coupled to the rotor core. The rotor core may include a first core to which the permanent magnets may be coupled, and a second core made of a magnetic material and coupled to an end of the first core in an axial direction. The second core may have outer surfaces disposed inside of extension lines extending in the axial direction from inner surfaces of the permanent magnets, thereby suppressing magnetic flux leakage of the permanent magnet, and increasing rotational inertia of the rotor.

公开(公告)号：US20230402884A1

公开(公告)日：2023-12-14

申请号：US18235017

申请日：2023-08-17

Applicant: LG ELECTRONICS INC.

Inventor： Chisung PARK ,  Sangjoon EUM ,  Gyujong JEONG

IPC: H02K1/276 ,  F04D25/06 ,  H02K21/14

CPC classification number: H02K1/276 ,  F04D25/06 ,  H02K21/14 ,  F25B31/023

Abstract: An electric motor and a compressor having an electric motor. The electric motor may include a stator, and a rotor provided with a rotational shaft, a rotor core coupled to the rotational shaft, and permanent magnets coupled to the rotor core. The rotor core may include a first core to which the permanent magnets may be coupled, and a second core made of a magnetic material and coupled to an end of the first core in an axial direction. The second core may have outer surfaces disposed inside of extension lines extending in the axial direction from inner surfaces of the permanent magnets.

公开(公告)号：US20180226864A1

公开(公告)日：2018-08-09

申请号：US15887477

申请日：2018-02-02

Applicant: LG Electronics Inc.

Inventor： Jaeho KIM ,  Byungkuk KAM ,  Chisung PARK ,  Jihyun AHN

IPC: H02K15/02 ,  H02K1/16 ,  H02K16/04 ,  H02K1/14

CPC classification number: H02K15/024 ,  H02K1/14 ,  H02K1/143 ,  H02K1/146 ,  H02K1/148 ,  H02K1/165 ,  H02K3/524 ,  H02K16/04 ,  H02K21/14 ,  H02K2213/03

Abstract: A motor including a stator includes a first stator core, and a second stator core that is independent from the first stator core and that is symmetric to the first stator core with respect to a vertical line that passes through a center of the stator. Each of the first and second stator cores includes a yoke, a center tooth that extends from a center of the yoke toward the center of the stator, and outer teeth that extend from a first end of the yoke and a second end of the yoke, respectively. The center tooth is located between the outer teeth, and a length of the outer teeth is greater than a length of the center tooth.