Title:
ELECTRIC MOTOR ROTOR, ELECTRIC MOTOR AND ELECTRIC VEHICLE
Document Type and Number:
WIPO Patent Application WO/2022/204992
Kind Code:
A1
Abstract:
The present application provides an electric motor rotor, an electric motor and an electric vehicle. The electric motor rotor comprises an iron-core back yoke, a spoke and at least two permanent magnets, wherein the iron-core back yoke is of a disc shape, the iron-core back yoke comprises an axial direction and a circumferential direction, the at least two permanent magnets are fixedly connected to the iron-core back yoke and are successively distributed at intervals in the circumferential direction, the spoke is located between adjacent permanent magnets, and the reluctance of the spoke is smaller than the reluctance of air or the reluctance of the spoke is smaller than the reluctance of a permanent magnet material. In the present application, a quadrature-axis magnetic path is reserved between adjacent permanent magnets, and a spoke, the reluctance of which is less than the reluctance of air or the reluctance of a permanent magnet material, is arranged on the quadrature-axis magnetic path, that is, the spoke is arranged between adjacent permanent magnets, such that the effects of reducing the reluctance of the quadrature-axis magnetic path and increasing quadrature-axis inductance can be achieved, thereby increasing a reluctance torque, and improving the torque output capability of an electric motor.
Inventors:
GENG WEIWEI (CN)
WU CHAOQIANG (CN)
CHEN JINHUA (CN)
ZHOU ZHAO (CN)
WU CHAOQIANG (CN)
CHEN JINHUA (CN)
ZHOU ZHAO (CN)
Application Number:
PCT/CN2021/084116
Publication Date:
October 06, 2022
Filing Date:
March 30, 2021
Export Citation:
Assignee:
HUAWEI DIGITAL POWER TECH CO LTD (CN)
UNIV NANJING SCI & TECH (CN)
UNIV NANJING SCI & TECH (CN)
International Classes:
H02K1/27
Foreign References:
| CN102624115A | 2012-08-01 | |||
| CN111355323A | 2020-06-30 | |||
| FR2606951B1 | 1994-04-22 | |||
| CN103915921A | 2014-07-09 | |||
| JP2012249347A | 2012-12-13 |
Other References:
See also references of EP 4300775A1
Attorney, Agent or Firm:
SCIHEAD IP LAW FIRM (CN)
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