Review of Modeling and Suppression Techniques for Electromagnetic Interference in Power Conversion Systems

The switching frequency of power converters is continuing to increase with the demand for their increased power density. Therefore, the frequency band of the electromagnetic interference (EMI) generated by power converters ranges from several kilohertz to 100 MHz or more, thereby increasing the importance of EMI countermeasures in power converters. In addition, with the practical applications of smart grids and microgrids and the introduction of 5G technology, cases wherein power converters and information communication devices are placed in close proximity are continuing to increase. Thus, in societies wherein power converters and information communication devices are highly integrated, it is necessary to ensure electromagnetic compatibility based on a different concept. This paper presents a review on modeling and suppression techniques for the EMI generated by power converters and discusses future prospects in this field.