基于小波分析的城轨列车牵引电机电源故障检测

Power Fault Detection in Intercity Rail Traction Motor Based on Wavelet Transform

为了实现城轨列车牵引电机在运行时故障隐患的实时监控,根据牵引电机非线性多耦合的特点,在MATLAB/Simulink仿真环境中建立了感应电机模型。针对三相电源电压幅值不对称对电机输出的影响,对电机输出转矩和转速进行了离散小波变换与分析。仿真结果验证了离散小波分析用于牵引电机三相电源故障预测和诊断的有效性和正确性。

To detect the potential fault of running rail trac- tion motor in real time, an induction motor model is built in MATLAB/Simulink based on the nonlinear and coupling characteristics of rail traction motor. Besides, according to the asymmetric fault in power supply voltage, the output torque and speed of traction motor are analyzed by using the discrete wavelet transform. Simulation results demon- strate the validity and correctness of the motor model and wavelet transform for the detection of the power supply voltage asymmetric fault in rail traction motor.