逆变器驱动电机系统EMC模型建立及直流侧传导干扰研究

Conducted EMI analysis and modeling of DC power supply with an inverter load

针对逆变器驱动电机系统建立了EMC(电磁兼容)模型,其中改进了三相异步电机的EMC模型,通过构建实验系统,对系统的直流侧传导干扰进行了测量,并采用Simulink工具对系统进行了时域传导干扰分析,仿真结果与实验吻合,结果显示主要传导干扰出现在逆变器载频的整数倍附近,在0～150kHz频段中随频率增加,传导干扰增大,其中共模传导干扰占主要成分.

Experimental study and modeling of conducted EMI in DC power supply with an inverter load are performed. Time domain analysis is carried out by using Matlab Simulink tool. The simulation result is agreed with experiment result. And it is shown that the conducted EMI increases with frequency increase, and the common conducted EMI dominates in the conducted EMI of system. 