Analysis of control strategies for compensated inductive power transfer system for electric vehicles charging

Electric vehicles are every day more and more important and diffuse in all day life. They represent a new prospective mode of transportation to address environment issues. The major drawbacks of the present electric vehicles are the long charging times and mechanical hassles with charging cables. The contactless battery charging is a challenging solution to overcome these issues. This paper deals with the topic of stationary wireless battery charging of electric vehicles and, in particular, on the inverter control and compensators sizing in the resonant series-parallel circuit configuration. The paper investigates, by means of simulations, the efficiency of a compensated inductive power transfer system as a function of distance and misalignment between the two pads for a 4 kW stationary electric vehicles charger.