摘   要：电动汽车电动机系统特性区别于传统的工业电动机，其噪声频谱也不同。通过对纯电动客车电动机系统噪声进行系统研究，分别得到纯电动客车电动机系统在不同工况下的噪声频谱图。通过分析得到各工况时的主要噪声频段。另外通过实验，可以进一步得到对应电动机结构每一部分的频谱结构图，为进一步分析电动机和降低电动机噪声提供基础。
关键词：电动汽车；电动机；噪声；频谱特性；研究

Abstract: The characteristics of the electric vehicle traction motor system different from the traditional industrial motor system,and the noise spectrum characteristics are also differently.Researches of noise spectrum characterstics of traction motor system for electric vehicle were performed detailed.The figures of noise spectrum characteristics were received at different conditions.And the same time with the structure of the electric vehicle motor system,the noise spectrum characteristics to each of its corresponding part can receive also.
Key Words: Electric vehicle;Motor;Noise;Spectrum characteristics;Research