公开(公告)号：US12051944B2

公开(公告)日：2024-07-30

申请号：US17635015

申请日：2020-08-27

申请人： Nidec Corporation

发明人： Yu-Wei Hsu ,  Ta-Yin Luo ,  Hsin-Nan Lin ,  Sheng-Chan Yen ,  Guo-Jhih Yan ,  Cheng-Tsung Liu

IPC分类号： H02K1/276 ,  H02K21/14 ,  H02K29/03

CPC分类号： H02K1/2766 ,  H02K21/14 ,  H02K29/03

摘要： A rotor includes a stack of electromagnetic steel plates each including through-hole groups with through-holes extending through the respective electromagnetic steel plates. In each of the through-hole groups, at least one of the through-holes accommodates a magnet and at least a portion of the through-holes that does not accommodate any magnet is filled with an electrically conductive material. When the rotor is seen axially, at two circumferential sides of a magnetic flux passage that is adjacent to the magnet, a width of the magnetic flux passage adjacent a first side of the magnet is larger than a width of the magnetic flux passage near a second side of the magnet.

公开(公告)号：US20240235349A1

公开(公告)日：2024-07-11

申请号：US18133759

申请日：2023-04-12

申请人： Industrial Technology Research Institute

发明人： YU-HSUN WU ,  KUO-LIN CHIU ,  YA-LING CHANG ,  CHUN-CHIEH CHANG

IPC分类号： H02K16/04 ,  H02K1/02 ,  H02K1/276

CPC分类号： H02K16/04 ,  H02K1/02 ,  H02K1/2766 ,  H02K2201/03

摘要： An electric motor with double stators includes a first stator, a first stator and a rotor assembly. The rotor assembly is located between the first stator and the second stator in a radial direction. The rotor assembly includes a rotor body, a plurality of first rotor slots, a plurality of second rotor slots, a plurality of first magnets, and a plurality of second magnets. A first air gap is formed between the rotor body and the first stator, and a second air gap is formed between the rotor body and the second stator. The material of the first magnets is different to the material of the second magnets, and any position of the first magnets is different to any position of the second magnets.

公开(公告)号：US20240223053A1

公开(公告)日：2024-07-04

申请号：US18558403

申请日：2022-03-02

申请人： TOSHIBA INDUSTRIAL PRODUCTS AND SYSTEMS CORPORATION ,  TOSHIBA INFRASTRUCTURE SYSTEMS & SOLUTIONS CORPORATION

发明人： Shinichi ICHIKAWA ,  Masayuki KAWAKAMI ,  Yuji YAMAMOTO ,  Makoto MATSUSHITA ,  Katsutoku TAKEUCHI

IPC分类号： H02K21/14 ,  H02K1/276 ,  H02K7/14

CPC分类号： H02K21/14 ,  H02K1/2766 ,  H02K7/14

摘要： A synchronous reluctance motor of an embodiment includes a columnar rotor iron core at a center of which a rotary shaft is disposed, and a flux barrier slit group provided for each magnetic pole of the rotor iron core, the slit group includes an outer layer slit disposed along an outer circumferential edge portion of the rotor iron core, and an inner layer slit having both end portions positioned close to an outer circumference of the rotor iron core on opposite sides of the outer layer slit in a circumferential direction, the inner layer slit having a curved shape that is convex toward a central side of the rotor iron core, and a permanent magnet is disposed in the inner layer slit.

公开(公告)号：US12009699B2

公开(公告)日：2024-06-11

申请号：US17666408

申请日：2022-02-07

申请人： MABUCHI MOTOR CO., LTD.

发明人： Wataru Kusakabe

IPC分类号： H02K1/276 ,  H02K21/16

CPC分类号： H02K1/2766 ,  H02K21/16

摘要： A rotor includes a cylindrical core main body having a columnar space on a rotation center side. A plurality of magnet accommodating hole pair penetrates the core main body in an axial direction and includes a pair of magnets accommodating holes arranged in a V shape so as to be separated from each other toward one side of the core main body which is a stator side in a radial direction. A plurality of permanent magnets is fixed in the respective magnet accommodating holes. The plurality of permanent magnets come into pressure contact with the permanent magnet from the q-axis side and the other side in the radial direction. A protrusion forming space penetrates in the axial direction and extending from a side surface to the one side in the radial direction along the side surface.

公开(公告)号：US20240186851A1

公开(公告)日：2024-06-06

申请号：US18413609

申请日：2024-01-16

申请人： GUANGDONG WELLING MOTOR MANUFACTURING CO., LTD. ,  MIDEA WELLING MOTOR TECHNOLOGY (SHANGHAI) CO., LTD.

发明人： Xiong YANG ,  Wenrui LI

IPC分类号： H02K1/276 ,  H02K1/16

CPC分类号： H02K1/2766 ,  H02K1/16 ,  H02K2213/03

摘要： A rotor structure, an electric motor structure and a clothing treating device are provided. The rotor structure includes a rotor iron core, a permanent magnet and a magnetic barrier. The rotor iron core includes rotor punching sheets arranged in a stacked manner. Permanent magnet slots are provided in the rotor iron core and the permanent magnet is disposed in the permanent magnet slots. The rotor structure rotates in one direction or two directions in a circumferential direction. In the rotation direction of the rotor structure, the magnetic barrier is provided on at least one side of the permanent magnet slot, and two ends of the magnetic barrier face an outer edge of the permanent magnet and an outer edge of the rotor iron core, respectively. The magnetic barrier is provided on a first punching sheet or a second punching sheet of the rotor punching sheets.

公开(公告)号：US11996738B2

公开(公告)日：2024-05-28

申请号：US17426818

申请日：2020-10-19

申请人： DENSO CORPORATION

发明人： Toshihiro Uchida

IPC分类号： H02K1/276

CPC分类号： H02K1/2766 ,  H02K2213/03

摘要： A rotor includes a rotor core, including a magnet accommodation cavity, and a permanent magnet, embedded in the magnet accommodation cavity of the rotor core and including a bent portion located toward a radially inner side of the rotor core. The permanent magnet has a thickness to satisfy an expression of

0.0006D+0.1626−0.5/(D/2)≤Wm/(D/2)≤−0.0006D+0.1626+0.5/(D/2).

公开(公告)号：US11973373B2

公开(公告)日：2024-04-30

申请号：US17277039

申请日：2018-10-30

申请人： Mitsubishi Electric Corporation

发明人： Atsushi Ishikawa

IPC分类号： H02K21/14 ,  F25B31/02 ,  H02K1/276

CPC分类号： H02K1/2766 ,  F25B31/026 ,  H02K21/14 ,  H02K2213/03

摘要： A rotor includes an electromagnetic steel sheet, a first permanent magnet, and a second permanent magnet. The electromagnetic steel sheet includes a first magnet insertion hole and a second magnet insertion hole that are arranged in a V shape, and also includes a center rib between the first magnet insertion hole and the second magnet insertion hole. The rotor satisfies T≤W1≤2×T≤W2, where T is a thickness of the electromagnetic steel sheet, W1 is a minimum width of the center rib, and W2 is a maximum width of the center rib.

公开(公告)号：US20240120818A1

公开(公告)日：2024-04-11

申请号：US18476295

申请日：2023-09-27

申请人： Rainer B. Meinke

发明人： Rainer B. Meinke

IPC分类号： H02K16/02 ,  H02K1/276 ,  H02K1/279 ,  H02K21/02

CPC分类号： H02K16/02 ,  H02K1/2766 ,  H02K1/279 ,  H02K21/028 ,  H02K2201/03

摘要： A magnetic array for use in a synchronous electrical machine or a magnetic gear box, comprising a plurality of discrete magnetic segments. When individual ones of the segments are spaced away from influence of ferromagnetic material, such as prior to placement in the array, each includes a pole having the same maximum field strength. Each segment is positioned in a sequence along a circumferential array with changes in field orientation by which the field of each segment is spatially rotated relative to the field of a next segment in the sequence. Each segment is positioned in sufficient proximity to the next segment in the sequence to enable the fields to interact with one another and effect flux channeling.

公开(公告)号：US20240106360A1

公开(公告)日：2024-03-28

申请号：US18038215

申请日：2021-03-02

申请人： Jiangsu University

发明人： Wenxiang ZHAO ,  Shengdao ZHU ,  Guohai LIU ,  Jinghua JI

IPC分类号： H02P21/05 ,  H02K1/276 ,  H02P21/14

CPC分类号： H02P21/05 ,  H02K1/2766 ,  H02P21/141 ,  H02K2213/03 ,  H02P21/0017

摘要： The present disclosure provides a method for reducing the electromagnetic vibration of a fractional slot concentrated winding (FSCW) permanent magnet (PM) motor, which provides a guidance for the low vibration design of FSCW PM motor. The implementation of the method includes: Based on Nyquist Shannon sampling theorem, the modulation effect of electromagnetic force in the air gap is obtained, and the electromagnetic force component that contributes the most to the electromagnetic vibration of the FSCW PM motor is determined. The equivalent analytical model of PM flux density is established to obtain the phase relationship between different flux density harmonics. According to Maxwell stress equation, the internal relationship between each order of flux density harmonics and electromagnetic force harmonics is obtained. A new magnet structure of the PM motor is designed, and specific flux density harmonics are injected to reduce the electromagnetic force and electromagnetic vibration of the FSCW PM motor.

公开(公告)号：US11929648B2

公开(公告)日：2024-03-12

申请号：US17255716

申请日：2018-07-27

申请人： Mitsubishi Electric Corporation

发明人： Tomoki Masuko ,  Masahiro Nigo

IPC分类号： H02K1/276 ,  F25B31/02 ,  H02K21/16

CPC分类号： H02K1/2766 ,  F25B31/026 ,  H02K21/16 ,  H02K2201/09

摘要： An electric motor includes: a stator including a first stator core, a second stator core, and a slot in which a stator winding is disposed, and a rotor including a first rotor core facing a first stator core in a radial direction and a second stator core facing the second stator core in the radial direction. The first stator core and the second stator core are laminated in an axial direction. The stator includes a depression formed in a position facing the slot and not touching the stator winding. A volume of the first rotor core is smaller than a volume of the second rotor core.