An EM-Circuit Co-simulation Model to Predict Insertion Loss in a Busbar-PCB type EMI Filter

Recently, a busbar-PCB structure for the installation of EMI filter has been used widely, especially in the automotive industry, which accommodates large current for driving electric motors. In this paper, an EM-circuit co-simulation model is proposed to efficiently estimate the insertion loss in a busbar-PCB type EMI filter. The developed co-simulation model was applied to a prototype busbar-PCB filter, and the predicted data proved to coincide very good to the measured insertion loss in common mode and differential mode up to 100 MHz, which confirms the validness of the proposed method.