开关磁阻起动/发电系统功率变换器传导EMI建模研究

Modeling for Power Inverter Conducted EMI of Switched Reluctance Starter/Generator

在分析开关磁阻起动/发电系统功率变换器产生的传导电磁干扰(EMI)传播通道(包括共模和差模)的基础上,采用等效电路模型的方法建立了功率变换器的传导EMI时域模型,并用Ansoft-Simplorer软件以及傅里叶级数分解的方法分析计算了功率变换器产生的EMI频谱,研究结果表明在低频段(小于100 kHz),功率变换器的差模干扰占据主导地位,在高频段,共模干扰占据主导地位。将仿真结果与实测的干扰电压波形和EMI频谱结果进行了比较,验证了所建模型和所用方法的正确性。

Based on the analysis of conducted electromagnetic interference（EMI） transmission channel（including common mode and differential mode） for switched reluctance starter/generator power converter,an accurately equivalent circuit model for power inverter conducted EMI was built in time-domain.Ansoft-Simplorer software and the method of Fourier series decomposition were used to calculate the EMI spectrum of the power converter.The research results show that the differential mode interference occupies the dominant position in low frequency（100 kHz） and common mode interference occupies the dominant position of in high frequency.The simulation results with the measured interference voltage and the EMI spectrum were compared to demonstrate the correctness of the model and the method.