中文摘要：

在阐述了三相变流器电磁干扰特点的基础上,提出了一种新的EMI滤波器的设计方法.分析了三相变流器的共模、差模干扰回路,建立了插入滤波器后三相共模、差模等效模型.考虑了阻抗失配条件下对滤波器设计的影响,根据测得传导干扰所需衰减量,确定滤波元件参数选取.该方法以电流源为噪声模型,绕过了源阻抗估算这一难点,简化了设计难度,仿真结果表明了该设计方法的有效性和实用性.

英文摘要：

On the basis of elaborating the EMI characteristics of three-phase converter in this paper, a new method was proposed. The three-phase converter common mode and differential mode interference loop was analyzed, and the three-phase CM and DM model with filters were established. The influence of impedance mismatch on the filter designing was taken into consideration. The parameters of filter components were determined. The proposed method selected the current source as noise source, which bypassed the difficulty of estimating source impedance and simplified the design process. The simulation results show the effectiveness and practicality of the method.