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[摘要]
电磁振动噪声水平是衡量电动汽车舒适性的综合指标。径向电磁力是电磁振动噪声的主要激振源。对电动汽车驱动用永磁同步电机(PMSM)的径向电磁力进行分析,对径向电磁力时空分离得到的三维频谱图提取出对电磁噪声影响较大的时空阶次及力密度,再运用有限元法对转子不同方式分段斜极的PMSM进行振动噪声仿真,通过结果对比找到最优的转子分段斜极方式。
[Key word]
[Abstract]
Electromagnetic vibration and noise level is a comprehensive index to measure the comfort of electric vehicles. Radial electromagnetic force is the main excitation source of vibration and noise. The radial electromagnetic force of permanent magnet synchronous motor (PMSM) is analyzed. The three-dimensional spectrum obtained from the radial electromagnetic force space-time separation is used to extract the certain time-space order and the corresponding force densities which have great influence on the electromagnetic noise. The finite element method is used to simulate the vibration and noise of PMSMs with different types of step-skewed rotor. The optimal type of step-skewed rotor is found by comparing the results.
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