摘  要：针对无刷直流电动机逆变器功率管短路及开路故障，文中采用小波变换对电机转速信号进行时间-频率域分析，并结合傅里叶变换进行对比研究。仿真结果表明小波变换能有效地实现逆变器的故障检测。
关键词：无刷直流电机；逆变器；故障检测；小波变换；傅里叶变换

Abstract: Aimed at the short-circuit and open-circuit fault of transistors in the inverter of Brushless direct current motor,this paper used wavelet transform to analyze the signal of the running speed of the motor in the time-frequency domain,and combined with fourier transform to carry out comparative study.The simulation results show that wavelet transform can effectively achieve the fault detection of inverter.
Key Words: BLDCM;Inverter;Fault detection;Wavelet transform;Fourier transform