调速永磁同步电动机高频电磁噪声的分析与抑制

Analysis and Simulation of High-Frequency Noise of Vector-Contorlled PMSM System

分析了矢量控制调速永磁同步电动机驱动系统中产生PWM谐波电流的原因,并基于该分析结果给出了高频电磁噪声的特征。基于分析结果,提出了解决该类电磁噪声的几种方式,并采用有限元仿真软件EasiMotor对分析结论进行仿真验证,仿真结果验证了理论分析的正确性。

The high frequency electromagnetic noise caused by PWM was analysed based on the analysis of the PWM harmonic current in vector-controlled PMSM system. Rased on the result, the characteristics of the noise were studied, and the solutions to reducing the noise were proposed. The simulation of finite element method with EasiMotor software verified the validity of methods.