Dynamic Wireless Power Transfer Using an Isolated DC-DC Converter

Abstract

The use of electric vehicles is increasing exponentially in the real world, to limit the usage of fossil fuels and reduce air pollution. At some point in the near future, internal combustion engine mobility will be overtaken by E-mobility. To gain an advantage over the conventional internal combustion engine, E-mobility has to increase its range. This range extension can be done by battery swapping, or by wireless power transfer. Wireless power transfer is an exponentially growing technology, researchers are working tirelessly and there is rapid development concerning range, size, high frequency, and efficiency. Wireless power transfer is a safer, reliable, cheap, and convenient topology for charging electric vehicles. Dynamic charging of the electric vehicle battery will reduce the need for heavy, large capacity, and costly batteries. In this paper, a dynamic inductive type wireless power transfer for the two-wheeler and last-mile delivery electric vehicles is proposed. Dynamic inductive type wireless power transfer transfers power from AC/DC supply wirelessly and an isolated DC-DC full-bridge converter is implemented at the receiver side to meet the battery requirement. LCL compensating network is used to reduce harmonics and switching losses. Simulations for the proposed system was carried out for the dynamic charging of electric vehicle battery in Matlab and, a comparision of rate of change of SoC with and without isolated DC-DC full-bridge converter is evaluated.