Ricerc@Sapienza

The motivation of this work is the characterization
of semiconductor switches in DC/DC Wide Band-Gap based
converters for electrical vehicle applications. The paper studies
Gallium Nitride High Electron Mobility (GaN HEMT) Transistors,
which present very good features for high-frequency highefficiency
applications. In order to obtain an efficient DC/DC
converter design, a full characterization of these devices must be
carried out. A double pulse test is applied to the GaN device,

An active coil system is proposed to shield the magnetic field produced by a dynamic wireless power transfer (WPT) system used to power electric vehicles (EVs) in motion. The considered dynamic WPT is based on an electrified road with many short-track pads. A sophisticated mathematical procedure is developed to optimize the design of the active coils configuration and their excitation.

This paper deals with the numerical evaluation of the magnetic field emitted by a wireless power system (WPT) in an electric vehicle (EV). The numerical investigation is carried out using a finite element method (FEM) code with a transition boundary condition (TBC) to model conductive materials. First, the TBC has been validated by comparison with the exact solution in simple computational domains with conductive panels at frequencies used in WPT automotive.