An efficient common-mode hybrid EMI filter used in switch-mode power supply

After the study of electromagnetic interference (EMI) mechanisms in switching mode power system (SMPS) and the soft switch, this paper proposes a novel hybrid filter (HEF) to suppress commend mode EMI in SMPS. The HEF consists of a passive filter and an active filter. Matching network, which can reduce impedance mismatching effects, is introduced in passive… (More)