Title:
ROTOR PUNCHING SHEET, ROTOR IRON CORE, ROTOR, ELECTRIC MOTOR, AND VEHICLE
Document Type and Number:
WIPO Patent Application WO/2022/160617
Kind Code:
A1
Abstract:
Provided are a rotor punching sheet, a rotor iron core, a rotor, an electric motor, and a vehicle. The rotor punching sheet comprises a punching sheet body, a shaft hole and a plurality of slot groups, wherein the shaft hole is provided in the punching sheet body; the plurality of slot groups are provided in the punching sheet body; each slot group comprises at least one magnetic slot; each magnetic slot comprises two magnet slots; and each magnet slot comprises a first slot end and a second slot end, which are on the axial end face, the first slot end being disposed closer to the shaft hole than the second slot end. A peripheral edge of the punching sheet body comprises a peripheral section on the axial end face, the peripheral section comprises a plurality of arc-shaped sections connected to each other and corresponding to the plurality of slot groups, and each arc-shaped section comprises a first circular arc section concentric with the shaft hole, and a second circular arc section eccentric from the shaft hole. According to the present application, the combination of the first circular arc section and the second circular arc section can, on the basis of ensuring an output torque of an electric motor, effectively improve the sinusoidal degree of an air-gap magnetic field, reduce harmonic waves, decrease the torque pulsation of the electric motor, and solve the problem of vibration noise.
Inventors:
WANG FEI (CN)
WANG PAN (CN)
GU ZHENGYONG (CN)
YANG LINLIN (CN)
WANG PAN (CN)
GU ZHENGYONG (CN)
YANG LINLIN (CN)
Application Number:
PCT/CN2021/107044
Publication Date:
August 04, 2022
Filing Date:
July 19, 2021
Export Citation:
Assignee:
ANHUI WELLING AUTO PARTS CO LTD (CN)
GUANGDONG WELLING AUTO PARTS CO LTD (CN)
GUANGDONG WELLING AUTO PARTS CO LTD (CN)
International Classes:
H02K1/22; H02K1/27; H02K1/28
Foreign References:
| CN112234735A | 2021-01-15 | |||
| CN105576867A | 2016-05-11 | |||
| CN102738993A | 2012-10-17 | |||
| CN106972665A | 2017-07-21 | |||
| CN202110122976A | 2021-01-29 | |||
| CN202120251257U | 2021-01-29 |
Other References:
See also references of EP 4184756A4
Attorney, Agent or Firm:
YOULINK INTELLECTUAL PROPERTY LAW FIRM (CN)
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