Ricerc@Sapienza

The paper provides a parametric investigation on the magnetic field produced by a wireless power transfer (WPT) system to recharge the battery of an electric vehicle (EV), varying the position of the secondary coil in the car underbody. The considered WPT charging system operates at the frequency of 85 kHz with a power of 7.7 kW. The WPT system creates a very strong magnetic field that can be critical for human exposure to electromagnetic fields (EMF) and for immunity of implanted medical devices.

A numerical investigation is carried out to assess the EMC and EMF safety compliance of a wireless power transfer (WPT) system used to recharge the battery of an electric vehicle (EV). The assessment is numerically performed considering a WPT system working at the frequency of 85 kHz with output power of 7.7 kW. The prediction of the electromagnetic field is carried out by using a finite element method (FEM) code to model the WPT coils and the chassis of the car.

An investigation is carried out to assess the conducted emission (CE) in a wireless power transfer (WPT) system for automotive applications. The assessment is performed by simulations of the whole system which is modeled by a circuit representation of each single subsystem, including the coupled inductive coils, compensation networks, converters and terminations. The obtained circuit model is analyzed using SPICE circuit simulator. The CE is investigated considering two different compensation topologies: series-series (SS) and LCC.