High power density EMI filter design with consideration of self-parasitic

A compact EMI filter becomes one of the critical issue for a high power density converter design especially in transportation applications. This paper proposed a design procedure for a more compact EMI filter with consideration of both the low frequency and high frequency attenuation requirement. For simplicity purpose, EMI filter transfer gain is utilized to conduct the analysis. With the proposed method, the best stage number and components value can be systematically derived given a fixed operating point.