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Electromagnetic noise analysis and optimization for permanent magnet synchronous motor used on electric vehicles

Y.S. Wang (School of Mechanical and Automotive Engineering, Shanghai University of Engineering Science – Songjiang Campus, Shanghai, China)
H. Guo (School of Mechanical and Automotive Engineering, Shanghai University of Engineering Science – Songjiang Campus, Shanghai, China)
Tao Yuan (School of Mechanical and Automotive Engineering, Shanghai University of Engineering Science – Songjiang Campus, Shanghai, China)
L.F. Ma (School of Mechanical and Automotive Engineering, Shanghai University of Engineering Science – Songjiang Campus, Shanghai, China)
Changcheng Wang (School of Mechanical and Automotive Engineering, Shanghai University of Engineering Science – Songjiang Campus, Shanghai, China)

Engineering Computations

ISSN: 0264-4401

Article publication date: 13 November 2020

Issue publication date: 8 February 2021

411

Abstract

Purpose

Electromagnetic noise of permanent magnet synchronous motor (PMSM) seriously affects the sound quality of electric vehicles (EVs). This paper aims to present a comprehensive process for the electromagnetic noise analysis and optimization of a water-cooled PMSM.

Design/methodology/approach

First, the noises of an eight-pole 48-slot PMSM in at speeds up to 10,000 rpm are measured. Furthermore, an electromagnetic-structural-acoustic model of the PMSM is established for multi-field coupling simulations of electromagnetic noises. Finally, the electromagnetic noise of the PMSM is optimized by using the multi-objective genetic algorithm, where a multi-objective function related to the slot width of PMSM stator is defined for radial electromagnetic force (REF) optimization.

Findings

The experimental results show that main electromagnetic noises are the 8n-order (n = 1, 2, 3, …) and 12-order noises. The simulated results show that the REFs are mainly generated by the 8n-order (n = 1, 2, 3, 4, 5, 6) vibrations, especially those of the 8th, 16th, 24th and 32th orders. The 12-order noise is a mechanical noise, which might be caused by the bearings and other structures of the PMSM. Comparing the simulated results before and after optimization, both the REFs and electromagnetic noises are effectively reduced, which suggests that an appropriate design of stator slot is important for reducing electromagnetic noise of the PMSM.

Originality/value

In view of applications, the methods proposed in this paper can be applied to other types of PMSM for generation mechanism analysis of electromagnetic noise, optimal design of PMSM and thereby noise improvement of EVs.

Keywords

Acknowledgements

This work was supported by the Project of National Natural Science Foundation of China [No. 51675324], and partly supported by the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning, China.

Declaration of conflicting interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Citation

Wang, Y.S., Guo, H., Yuan, T., Ma, L.F. and Wang, C. (2021), "Electromagnetic noise analysis and optimization for permanent magnet synchronous motor used on electric vehicles", Engineering Computations, Vol. 38 No. 2, pp. 699-719. https://doi.org/10.1108/EC-02-2020-0070

Publisher

:

Emerald Publishing Limited

Copyright © 2020, Emerald Publishing Limited

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