对系统总体设计方案进行了研究分析，硬件设计中详细介绍了控制回路的电流检测模块、电机转速和位置检测模块、PWM输出和故障输入电路。
The overall design scheme is researched. The hardware of current detection module, motor speed and location detection module and PWM output and fault input module is introduced in detail.
详细阐述了牵引电机实行状态修的内容，并提出了牵引电机的几种故障检测和诊断方法。
This paper gives the contents of traction motor repair according to condition in detail. Several fault detection and diagnosis methods of traction motor are presented.
在异步电机转子断条故障检测中，将原信号最优小波包分解，经自适应滤波后再信号重构。
During detection of asynchronous motor rotor-bar broken fault, the signal of current was reconstruct after decomposed by best wavelet packet and adaptive filtered.
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