河北水利电力学院学报2026，Vol.36Issue(2)：15-20,6.DOI:10.16046/j.cnki.issn2096-5680.2026.02.003
基于改进FFT分析的永磁同步电机局部退磁故障检测方法
A Local Demagnetization Fault Detection Method for Permanent Magnet Synchronous Motor Based on Improved FFT Analysis
摘要
Abstract
With the advancement and implementation of China's"dual carbon goals",the development of the electric vehicle(EV)industry has been rapidly progressing.Permanent magnet synchronous motor(PMSM)is widely used in the EV sector due to its high operational performance,high power density,and compact size.However,in automotive applications,factors such as limited installation space,poor heat dissipation conditions,complex operating conditions,and high-speed motor operation may lead to localized damage of the permanent magnets,resulting in partial demagnetization and degraded motor control per-formance.Therefore,researching,analyzing,and detecting localized demagnetization faults of permanent magnets is of significant importance.This paper takes a 10-pole PMSM as an example,replacing the mag-net blocks to simulate localized demagnetization fault.Subsequently,a mathematical model of partial de-magnetization is established,and theoretical analysis is conducted using Fourier transform to obtain fault characteristics during localized demagnetization.Finally,trial is conducted on a hardware-in-the-loop sim-ulation platform to detect localized demagnetization faults,verifying the effectiveness and accuracy of the improved FFT method.关键词
电动汽车/永磁同步电机/局部退磁/FFTKey words
EV/PMSM/Partial Demagnetization/FFT分类
信息技术与安全科学引用本文复制引用
张建秋,张文龙,师路欢,路清云,贾茂松..基于改进FFT分析的永磁同步电机局部退磁故障检测方法[J].河北水利电力学院学报,2026,36(2):15-20,6.基金项目
河北省教育厅科学研究资助项目(ZC2025066) （ZC2025066）
