-
1.发明申请公开(公告)号：US20200007004A1
公开(公告)日：2020-01-02
申请号：US16492213
申请日：2018-02-27
Applicant: LG ELECTRONICS INC.
Inventor： Kiman KIM , Sangjoon EUM , Dongseok RYU
Abstract: 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.
-
2.发明公开公开(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
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：US20210222922A1
公开(公告)日：2021-07-22
申请号：US17060705
申请日：2020-10-01
Applicant: LG Electronics Inc.
Inventor： Injae LEE , Sangjoon EUM , Jeonghwan KIM , Mingyu KIM , Heedon JUNG
Abstract: 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：US20210044186A1
公开(公告)日：2021-02-11
申请号：US16966814
申请日：2019-01-30
Applicant: LG Electronics Inc.
Inventor： Dongseok RYU , Kiman KIM , Sangjoon EUM
Abstract: 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.
-
Patent Agency Ranking
公开(公告)号：US20250015652A1
公开(公告)日：2025-01-09
申请号：US18591473
申请日：2024-02-29
Applicant: LG Electronics Inc.
Inventor： Sangjoon EUM , Jeonghyun CHO , Songe PARK , Gyujong JEONG , Kyungho HA
IPC: H02K1/2791 , D06F37/30
Abstract: A magnet includes one or more polar regions each having an arc shape and arranged in a circumferential direction. A magnetic focus center of each polar region is different from a center of an inner diameter of the one or more polar regions. A value obtained by dividing (i) dm, a distance from a straight line connecting ends of a first magnetic center line of the one or more polar regions to a center of the first magnetic center line, by (ii) db, a distance from a straight line connecting ends of a second magnetic center line of the one or more polar regions to a center of the second magnetic center line, satisfies certain values based on a number of the polar regions. db is determined based on the one or more polar regions having a magnetic focus center that corresponds to the center of the inner diameter.
-
公开(公告)号：US20250014797A1
公开(公告)日：2025-01-09
申请号：US18591502
申请日：2024-02-29
Applicant: LG Electronics Inc.
Inventor： Gyujong JEONG , Sangjoon EUM , Songe PARK , Jeonghyun CHO , Kyungho HA
Abstract: A magnet orientation device includes an upper plate disposed on a magnet raw material, a lower plate disposed below the magnet raw material, and dies disposed on sides of the magnet raw material. The upper plate has a convex upward arc shape. The upper plate includes a first magnetic region and a first non-magnetic region that surround the first magnetic region and the lower plate includes a second magnetic region and a second non-magnetic region that surround the second magnetic region. A lower surface of the first magnetic region provides a plurality of grooves and an upper surface of the second magnetic region provides a plurality of protrusions. A horizontal length of the first magnetic region is greater than a horizontal length of the magnet raw material and a horizontal length of the second magnetic region is equal to or less than the horizontal length of the magnet raw material.
-
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
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：US20210036591A1
公开(公告)日：2021-02-04
申请号：US16967685
申请日：2019-01-30
Applicant: LG Electronics Inc.
Inventor： Dongseok RYU , Kiman KIM , Sangjoon EUM
Abstract: A dual rotor-type motor, according to one embodiment of the present invention, comprises: a stator having a coil wound therearound; an outer rotor; and an inner rotor, wherein the stator comprises inner teeth facing the inner rotor, and outer teeth facing the outer rotor, wherein the inner teeth are misaligned in a rotating direction by as much as an angle configured with respect to the outer teeth, and thus the present invention 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：US20180294685A1
公开(公告)日：2018-10-11
申请号：US15945927
申请日：2018-04-05
Applicant: LG Electronics Inc.
Inventor： Dongseok RYU , Sangjoon EUM , Kiman KIM
Abstract: An electric motor includes a stator, and a rotor spaced apart from the stator by a gap. The rotor includes a first magnet that generates first magnetic flux, that includes first magnetic portions arranged in a circumferential direction of the rotor, and that are configured to generate a magnetic field in the gap, and second magnetic portions that are alternately arranged with the plurality of first magnetic portions along the circumferential direction of the rotor. The rotor further includes a plurality of second magnets that are each located between a first magnetic portion of the first magnetic portions and a second magnetic portion of the second magnetic portions that is adjacent to the first magnetic portion, where each second magnet generates second magnetic flux that is greater than the first magnetic flux, and the first magnet is located radially between the gap and the plurality of second magnets.
-
-
-
-
-
-
-
-
Search Results
9
records
(took 0.015 seconds)
