由于车用驱动电机追求更宽的调速范围和更高的功率密度,导致电机产生的振动噪声进一步增大。为此针对车用驱动电机电磁振动噪声产生的机理,提出了适用于车用驱动电机不同电磁振动噪声源特征频率的识别方法。对电机定、转子磁场谐波进行分析,得出了磁场频率的数学解析表达式。对电机电磁激振力的阶次和频率进行研究,总结得出了不同电磁振动噪声源的特征频率。通过对电机电磁振动噪声测试数据进行诊断分析,验证了所提诊断方法的准确性。

Since the broader the range of speed regulation and the higher the power density of traction motor was needed, the vibration noise was increased. Therefor aiming at the generation mechanism of electromagnetic vibration noise of traction motor, the identification method of characteristic frequency was proposed suitable for different electromagnetic vibration noise source. The magnetic field harmonic of motor stator and rotor was analyzed, thus the mathematical analytical expression on field frequency is elicited. Then the degree and frequency of electromagnetic excitation force was researched, thereby the characteristic frequency of different electromagnetic vibration noise source was summed up. Through the diagnostic analysis on the testing data of electromagnetic vibration noise, the accuracy of diagnostic method proposed was verified.

TM 306