Preliminary study on conducted emission of a dynamic wireless power transfer system for automotive

Aim of this work is an investigation on the conducted emission (CE) of a dynamic wireless power transfer (DWPT) system for automotive applications. The main difference of DWPT systems compared to stationary charging systems is due to the fast transients produced by the on/off and off/on transitions of the transmitting coils during the passage of the vehicle in motion. These transients could represent a significant issue in terms of CE, especially if multiple vehicles are moving along the electrified road. Real components such as coupled inductive coils, compensation networks, converters and battery are suitably modeled by equivalent circuits which are analyzed by SPICE models. The CE is investigated considering different scenarios with single and multiple electric vehicles (EVs) absorbing each 10 kW at 85 kHz in a section of an electrified road with short track architecture. The obtained results demonstrate that higher order harmonics of currents produced by electronic converters are not negligible in both ground and vehicle circuits.