The widely spread of information-communication technology (ICT) devices raises a critical issues about conducted electromagnetic interference (EMI) between switching devices and signal transmission. In order to design an effective passive or active filter to mitigate EMI, the actual modal impedances of the involved components should be investigated. In this blog, the SPICE simulation setup is introduced to investigate the frequency response of the common mode (CM) and differential mode (DM) impedance of a complete automotive power train.
A typical powertrain of electric vehicles is illustrated including battery, DC cables, inverter, AC cables and motor. The SPICE model of a automotive power train is built considering both low-frequency functional aspects and high-frequency parasitic effects.