基于改进FFT分析的永磁同步电机局部退磁故障检测方法OA

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.