A Review of Radiated EMI Research in Power Electronics Systems

Radiated electromagnetic interference (EMI) is a very important research topic in power electronics systems in recent years as the switching frequencies of power electronics converters increase significantly with the adoption of wide bandgap (WBG) devices. In this survey article, the radiation mechanisms of both near- and far-field radiations in power electronics systems are first reviewed. Second, for noise sources, the switching characteristics of switching devices and their impacts on radiated EMI were discussed. Third, high-frequency radiated EMI modeling and prediction techniques are summarized for both isolated and nonisolated power converters. Low-frequency (LF) radiated EMI modeling and prediction techniques were also reviewed. Fourth, techniques developed for the mitigation of noise sources, the reduction of noise on its propagation paths, and the optimization of critical PCB traces were fully reviewed. Finally, future challenges and research topics for radiated EMI are discussed.