Numerical study of fault characteristics of non-uniform demagnetization of permanent magnet synchronous motor

Guopei Wu; Yinquan Yu

doi:10.1117/12.2619445

29 November 2021 Numerical study of fault characteristics of non-uniform demagnetization of permanent magnet synchronous motor

Guopei Wu, Yinquan Yu

Author Affiliations +

Proceedings Volume 12080, 4th International Symposium on Power Electronics and Control Engineering (ISPECE 2021); 120803C (2021) https://doi.org/10.1117/12.2619445
Event: 4th International Symposium on Power Electronics and Control Engineering (ISPECE 2021), 2021, Nanchang, China

Abstract

To study the influence of the non-uniform demagnetization of permanent magnets (PMs) on motor performance, this paper takes a three-phase eight-pole Permanent Magnet Synchronous Motor (PMSM) as the research specimen. The influences of back electromotive force (Back-EMF) and radial magnetic density with different grades and types of demagnetization are analyzed. The numerical results prove that as the grade of non-uniform demagnetization increases, the back-EMF and radial magnetic density gradually decrease, after FFT, according to the changes law of the amplitudes of some harmonics frequency of the back-EMF, it should be determined whether the motor has non-uniform demagnetization. This research could provide a guideline for fault diagnosis of motor demagnetization.

Citation Download Citation

Guopei Wu and Yinquan Yu "Numerical study of fault characteristics of non-uniform demagnetization of permanent magnet synchronous motor", Proc. SPIE 12080, 4th International Symposium on Power Electronics and Control Engineering (ISPECE 2021), 120803C (29 November 2021); https://doi.org/10.1117/12.2619445

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