Review of Radiated EMI Modeling and Mitigation Techniques in Power Electronics Systems

Radiated electromagnetic interference (EMI) is a very important research topic in power electronics systems in recent years as the switching frequency of power electronics converters increases significantly. In this article, the mechanism of radiated EMI generation and propagation in power electronics systems was disclosed, a generalized radiated EMI model was developed at first. Then, switching characteristics and its impact on radiated EMI was compared between wide bandgap (WBG) devices and Si MOSFETs. Third, the radiated EMI modeling and mitigation techniques including component improvement, PCB layout improvement, high-frequency EMI filters, and shielding, etc. were reviewed and summarized. Both the radiated EMI research above 30MHz and below 30MHz are surveyed. Future challenges and research topics for the radiated EMI are systematically summarized in the end.