Title:
PERMANENT MAGNET ELECTRIC MOTOR HAVING REDUCED COGGING TORQUE RIPPLE
Document Type and Number:
WIPO Patent Application WO/2023/116057
Kind Code:
A1
Abstract:
A permanent magnet electric motor having reduced cogging torque ripple, the permanent magnet electric motor comprising a stator component, permanent magnets and a rotor component, wherein the rotor component is mounted in the center of the stator component, and an air gap is formed between an outer circumferential face of the rotor component and an inner arc face of the stator component; and each permanent magnet has an isosceles trapezoid cross-section, the permanent magnet is fixed in the rotor component and has the central line thereof coinciding with the radius line of the rotor component, the path of magnetic lines of the permanent magnet is distributed from the central line of the permanent magnet as a reference to both sides of the central line in a symmetric distribution and respectively forms included angles of 90° with a trapezoidal left side face and a trapezoidal right side face of the permanent magnet, and the trapezoidal left side face and the trapezoidal right side face of the permanent magnet respectively form included angles with the central line of the permanent magnet. According to the present invention, by means of changing the shape of the permanent magnet, the cogging torque ripple of the permanent magnet electric motor can be reduced in order to reduce the vibrations and noise caused by the cogging torque ripple and reduce the fluctuations in speed, so that the permanent magnet electric motor runs stably.
Inventors:
ZHOU JIANMIN (CN)
XU HENGSHUAI (CN)
HE HAILIANG (CN)
LIU PEIHAI (CN)
XU HENGSHUAI (CN)
HE HAILIANG (CN)
LIU PEIHAI (CN)
Application Number:
PCT/CN2022/117669
Publication Date:
June 29, 2023
Filing Date:
September 07, 2022
Export Citation:
Assignee:
NINGBO HENGSHUAI CO LTD (CN)
International Classes:
H02K1/276; H02K29/03
Foreign References:
| CN114268181A | 2022-04-01 | |||
| CN201656728U | 2010-11-24 | |||
| CN207184193U | 2018-04-03 | |||
| CN106329776A | 2017-01-11 | |||
| CN102868343A | 2013-01-09 | |||
| US20040150283A1 | 2004-08-05 |
Attorney, Agent or Firm:
NINGBO TIANYI PATENT AGENT LTD. (CN)
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