Evaluation of Receiving Power Control for Dynamic Wireless Power Transfer Using Pulse Density Modulation

Abstract

Dynamic wireless power transfer is widely studied to improve the short cruising distance and long charging time of electric vehicles. The receiving power control is very important to avoid the battery from overcharging. The authors have reported the receiving power control using pulse density modulation (PDM), however, the accuracy of the zero current switching (ZCS) is not good and the evaluation of the control performance is not deeply discussed. In this paper, the ZCS is improved using a comparator circuit and the control performance of receiving power control using the PDM is evaluated.