基于试验验证的永磁同步电机电磁噪声优化方法探究

Exploration on Electromagnetic Noise Optimization Approaches of Permanent Magnet Synchronous Motor Based on Experimental Verification

为解决电动汽车永磁同步电机电磁噪声问题,基于其电磁噪声产生机理,提出通过试验验证手段降低电磁径向力的方法来优化其电磁噪声,分别从结构硬件和控制策略两方面提出了从转子分段斜极优化、结构刚度优化耦合共振改善、电流谐波注入和气隙磁通密度改善等验证对比方式进行优化改善,并针对每种优化方式结合实际开发案例进行说明。结果表明,每种方式均有至少3 dB(A)的电磁噪声改善,进一步论证了通过试验手段优化电磁径向力来改善电磁噪声的效果与优势。

In order to solve the electromagnetic noise issues of Permanent Magnet Synchronous Motor(PMSM)on Electric Vehicle(EV),this paper,based on its electromagnetic noise generation mechanism,proposed a way of reducing electromagnetic radial force by means of test verification to optimize its electromagnetic noise.From the 2 aspects of structural hardware and control strategy,the optimization and improvement were carried out by the verification and comparison approaches such as rotor segmented skew pole optimization,structural stiffness optimization and coupling resonance improvement,current harmonic injection and gap flux density optimization,and each optimization approach was illustrated with practical development case.The result shows that each method has an attenuation of at least 3 dB(A)on electromagnetic noise of PMSM,which further demonstrates the effect and advantage of improving electromagnetic noise by optimizing electromagnetic radial force though experimental means.