Abstract
Dynamic wireless charging of electric vehicles (EVs) will significantly extend the range of EVs, thus increasing the potential for electrification of passenger cars. In this study, we propose copper strip wire as an alternative to litz wire. By using copper strip wires, it is possible to improve the coupling coefficient and Q value, and improve the transmission power while keeping the size of the primary and secondary coils small. We designed a controller driven at frequencies of 79-90kHz using SiC IPM and evaluated its operation through simulations and experiments. The measured energy efficiency was 90% in the on-vehicle state, and 150kW was output when the efficiency was 86% in a large tolerance condition.
