Ricerc@Sapienza

An innovative shielding configuration of active coils is proposed to mitigate the magnetic field around an electric vehicle (EV) with a wireless power transfer (WPT) system during battery charging. The active coil is designed to reduce the risk for patients with pacemakers or similar devices produced by the time varying magnetic field generated by the 85 kHz WPT coil currents. A numerical analysis of the magnetic field levels is carried out solving the magneto-quasi-static (MQS) equations by a FEM-based commercial tool.

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 study is presented on the magnetic field produced by a wireless power transfer (WPT) system installed in an electric vehicle (EV). The considered WPT charging system operates at the frequency of 85 kHz with an output power of 22 kW. The magnetic field levels are numerically calculated. In the simulations the presence of the conductive bodyshell of the vehicle is taken into account.

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.

This paper deals with the numerical evaluation of the magnetic field produced by a wireless power transfer (WPT) system in an electrical vehicle (EV) made by carbon-fiber (CF) laminates that are modeled as homogeneous anisotropic layers. The numerically calculated magnetic field generated by a 7.7 kW WPT system operating at 85 kHz has been compared with the reference levels of the ICNIRP guidelines. The main conclusion is that the anisotropy of the composite laminate does not play a relevant role at the considered frequency.