Research on EMI Shielding Inside Hybrid Intergrated Power Electronic Module

An active hybrid integrated power electronic module (IPEM) for medium power converter has been paid much attention to in the area of power electronic integration technology at present. EMI inside IPEM is very serious problem when IGBT chips and control drive ICs are integrated together closely.This paper finds that the high-frequency circulating current flowing along DC bus and power chips is main EMI source interfering with control drive circuit in hybrid IPEM.To suppress EMI caused by the circulating current, the electromagnetic shield is a very necessary and effective method.