开关变换器传导干扰抑制策略综述

Switching converters are widely applied in economy fields, where the electromagnetic interference (EMI) is becoming increasingly prominent, hence the suppression of EMI in switching converters becomes more essential. A state-of-the-art review of the conducted EMI suppression strategies for switching converters is presented, focusing on their basic principles, research statuses and effectiveness. The reviewed strategies include filtering, balance, compensation, improving pulse width modulation, power device/module packaging, printed circuit board design, improving switching process, etc. These strategies can be classified into two broad categories: blocking the coupling path and reducing the electromagnetic emission from the interference source. Finally, crucial questions and development prospects of conducted EMI suppression technologies for switching converters are discussed.