Application of SWPDT in the Feedback Control of Wireless EV Charging

Reliable data communication between primary side and secondary side is necessary in feedback control of wireless electric vehicle (EV) charging system. Simultaneous wireless power and data transmission (SWPDT) technology is attractive because the power and data are transferred wirelessly in a common inductive link, which is more straightforward and cost effective. Using the SWPDT technology with bidirectional full-duplex communication capability, a feedback control WPT system is proposed in this paper. Meanwhile, a simple data transmission protocol is designed. Finally, a 3.3kW WPT prototype is setup and the feedback control of the system is realized, which verifies the effectiveness of the SWPDT communication method.