基于小波变换的无刷直流电机逆变器故障检测仿真研究

Simulation research of brushless direct current motor inverter fault detection based on wavelet transform

针对无刷直流电动机逆变器功率管短路及开路故障,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。

Aimed at the short-circuit and open-cireuit fault of transistors in the inverter of brushless direct current motor,this paper uses wavelet transform to analyzes the signal of the running speed of the motor in the time-frequency domain and combines with Fourier transform to carry out comparative study. The simulation results show that wavelet transform can effectively achieve the fault detection of inverter.