Research on modeling of EV-DC/DC converter high-voltage EMI filter DM/CM circuit considering PCB parasitic elements

For accurate circuit modeling of common-mode(CM) and differential mode(DM) EMI filter, parasitic elements and coupling elements should be considered. In this paper, compared measurements and circuit modeling for insertion loss of high power PCB EMI filter used at electric vehicle. And power PCB, and considering the parasitic of the filter circuit, each device modeling through the development of DM&CM insertion loss measurements and simulation results were confirmed.