Analytical Calculation of Air Gap Magnetic Field of SPMSM with Eccentrically Cut Poles Based on Magnetic Pole Division

Jiahe Zhang, Jiapei Hu, Guobiao Gu () and Fangmian Du
Additional contact information
Jiahe Zhang: Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100101, China
Jiapei Hu: Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100101, China
Guobiao Gu: Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100101, China
Fangmian Du: Dongfang Electric Machinery Co., Ltd., Chengdu 611731, China

Energies, 2023, vol. 16, issue 11, 1-19

Abstract: In the design process of surface-mounted permanent magnet motor (SPMSM) for industrial robots and computer numerical control (CNC) machine tools, to pursue the sinusoidal nature of the back electromotive force, the magnetic poles in the form of eccentric pole cutting structure are often used. To analyze the no-load air gap magnetic field of the SPMSM with eccentrically cut poles simply and accurately, a subdomain model magnetic field analytical calculation method based on equal-area integral block processing of permanent magnets is proposed. The problem that the traditional subdomain analysis model cannot be directly applied to the SPMSM with eccentrically cut poles of unequal thickness is solved. The proposed method considers the influence of stator slotting and the actual permeability of permanent magnets, and directly obtains the fundamental wave and harmonic components of the no-load air gap flux density by solving the subdomain model. The finite element method (FEM) is used to directly calculate the air gap magnetic field for verification. The results of the analytical method and the no-load air gap magnetic density calculated by the FEM are consistent, which verifies the accuracy of the proposed analytical method and can quickly guide the design of the SPMSM with eccentrically cut poles.

Keywords: surface-mounted permanent magnet motor; eccentrically cut poles; subdomain model; analytical calculation; no-load air gap magnetic field; magnetic pole division (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/16/11/4450/pdf (application/pdf)
https://www.mdpi.com/1996-1073/16/11/4450/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:16:y:2023:i:11:p:4450-:d:1160817

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().