公开(公告)号：US12046953B2

公开(公告)日：2024-07-23

申请号：US16967685

申请日：2019-01-30

申请人： LG Electronics Inc.

发明人： Dongseok Ryu ,  Kiman Kim ,  Sangjoon Eum

IPC分类号： H02K16/02 ,  F25B1/02 ,  H02K1/278 ,  H02K1/2791 ,  H02K29/03

CPC分类号： H02K1/278 ,  F25B1/02 ,  H02K1/2791 ,  H02K16/02 ,  H02K29/03 ,  H02K2201/03

摘要： A dual rotor-type motor includes a stator having a coil wound therearound, an outer rotor, and an inner rotor. The stator includes inner teeth facing the inner rotor, and outer teeth facing the outer rotor, and the inner teeth are misaligned in a rotating direction by as much as an angle with respect to the outer teeth, which may enable the reduction of a torque ripple to a satisfying level, even without having to change the design of the stator structure into a complicated form.

公开(公告)号：US11824408B2

公开(公告)日：2023-11-21

申请号：US16966814

申请日：2019-01-30

申请人： LG Electronics Inc.

发明人： Dongseok Ryu ,  Kiman Kim ,  Sangjoon Eum

IPC分类号： H02K16/02 ,  F25B1/02 ,  H02K29/03 ,  H02K1/2791 ,  H02K1/278

CPC分类号： H02K16/02 ,  F25B1/02 ,  H02K1/278 ,  H02K1/2791 ,  H02K29/03

摘要： A dual rotor-type motor according to an embodiment of the present invention comprises: a stator around which a coil is wound; an outer rotor; and an inner rotor, wherein the inner rotor and the outer rotor have different initial angles, and thus the inner rotor and the outer rotor are misaligned from each other corresponding to the difference between the initial angles thereof. Therefore, the present invention can reduce torque ripple by a relatively simple method, and thus can improve efficiency of a motor and reduce vibration and noise.

公开(公告)号：US11777347B2

公开(公告)日：2023-10-03

申请号：US17039463

申请日：2020-09-30

申请人： LG ELECTRONICS INC.

发明人： Chisung Park ,  Sangjoon Eum ,  Gyujong Jeong

IPC分类号： H02K1/276 ,  F04D25/06 ,  H02K21/14 ,  F25B31/02 ,  F04D29/40

CPC分类号： H02K1/276 ,  F04D25/06 ,  H02K21/14 ,  F04D29/403 ,  F25B31/023

摘要： 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：US11604014B2

公开(公告)日：2023-03-14

申请号：US17060705

申请日：2020-10-01

申请人： LG Electronics Inc.

发明人： Injae Lee ,  Sangjoon Eum ,  Jeonghwan Kim ,  Mingyu Kim ,  Heedon Jung

IPC分类号： H02K1/26 ,  F25B31/02 ,  H02K1/276

摘要： The present disclosure relates to an electric motor, and a compressor having the same. The electric motor includes a stator, and a rotor. The rotor includes a rotation shaft, a rotor core, and a plurality of permanent magnets. The rotor core includes permanent magnet insertion portions each formed therethrough in an axial direction so that the permanent magnet is inserted, and slots each formed through the rotor core in a manner that a core area of a front portion of a d-axis is smaller than a core area of a rear portion of the d-axis in a rotating direction of the rotor when an outer core part of the permanent magnet insertion portion is divided with respect to the d-axis. Accordingly, a decrease in inertia can be suppressed and an occurrence of vibration and noise due to Magnetic Pull Force (MPF) can be prevented.

公开(公告)号：US11532967B2

公开(公告)日：2022-12-20

申请号：US16492213

申请日：2018-02-27

申请人： LG ELECTRONICS INC.

发明人： Kiman Kim ,  Sangjoon Eum ,  Dongseok Ryu

IPC分类号： H02K5/24 ,  F25B1/04 ,  H02K1/278 ,  H02K1/30 ,  H02K21/14

摘要： An electric motor having a permanent magnet and a compressor including an electric motor are provided. The electric motor may include a stator; and a rotor rotatably disposed and spaced a predetermined gap apart from the stator. The rotor may include a rotational shaft, a permanent magnet arranged concentrically to the rotational shaft, and a permanent magnet support that supports the permanent magnet. The permanent magnet may have a cylindrical shape and be magnetized to have polar anisotropy such that a magnetic field is formed on the magnet's surface facing the gap but is not formed on the magnet's surface opposite to the gap. The permanent magnet support may be configured to form no flux path in the permanent magnet and connect the rotational shaft to the permanent magnet. Thus, the rotor has a reduced weight with consequent suppression of vibration and noise.