Optimum coil configuration of wireless power transfer system in presence of shields

This paper deals with the coil optimization of a wireless power transfer (WPT) system configuration in presence of a shield which is used to mitigate the magnetic field in the environment. The performance of the WPT system and the magnetic field shielding are investigated by simulations and measurements in a WPT demonstrator working at the frequency of automotive applications (f=20-85 kHz). The proposed innovative simulation method allows choosing the optimum shield design of a WPT system in order to assure good electrical performance and compliance with EMC and EMF safety standards.