中文摘要：

该文对电动汽车驱动用异步电机的电磁振动/噪声进行分析和抑制,以一台额定功率40 kW异步电机的电磁噪声分析为例,列写可能引起异步电机电磁振动/噪声的危险电磁力波,并采用有限元法仿真获得电机关键工作点的气隙磁密,对磁密谐波进行时空谐波分析,从而确定危险电磁力波的幅值、次数和频率。采用有限元法分析电机结构的固有频率。通过电磁力波和电机结构的模态分析研究车用异步电机的电磁噪声特性,并通过合理的槽配合选择抑制电磁噪声。测试电机的空载噪声,通过空载噪声频谱的对比证明电磁振动/噪声分析的正确性。

英文摘要：

This paper analyzed the suppression of the electromagnetic vibration/noise produced by induction motors of electric vehicle（EV） drives.Taking a rated power 40 kW induction motor for example,dangerous exiting force waves that possibly induce serious electromagnetic vibration/noise were listed.The air gap flux densities of important operating points were simulated by FEM.The harmonic air gap flux densities were analyzed from space and time distribution.The magnitude,order and frequency of dangerous electromagnetic forces wave were identified.Natural frequencies of the motor structure were analyzed by the finite element method.Electromagnetic noise of a 40 kW induction motor was analyzed from the electromagnetic force wave and natural frequency aspects.Big noise was suppressed by an appropriate slot combination choice.No-load noise characteristics of the induction motors were measured.Correctness of the electromagnetic vibration/noise analysis was verified by the no-load noise spectrum comparisons.