Reconfigurable WPT system for load‐independent CC and CV output with transmitting‐side control

Abstract

This study proposes a reconfigurable wireless charging topology, which achieves load-independent constant current (CC) and constant voltage (CV) output without any communication link between transmitting and receiving coils. The proposed topology is suitable for CC–CV modes of battery charging. Inductor (L), capacitor (C) and inductor (L) connected as T type (LCL) compensation with an auxiliary capacitor on the transmitting side and series (S) compensation on the receiving side (LCL-S) is used to achieve load-independent CC and CV output. Reconfiguration has been achieved using single AC switch on transmitting side. Control has been implemented with the information on transmitting side. Load-independent CC and CV output operations have been analysed analytically. The merits of the proposed topology are fixed-frequency operation, simplified control scheme for load-independent CC–CV operation without any communication link. Feasibility of the proposed topology is verified by the experimental prototype with a CC output of 12 A and CV output of 56 V.