A dual-topology wireless power transfer system with constant current or constant voltage output for battery charging application

In this paper, a novel dual-topology wireless power transfer system for the battery charging application is presented. The power circuit configuration is composed of Series-Series (SS) and S-LCL topologies. The SS compensation topology provides load independent current output and S-LCL compensation topology provides load independent voltage output for the process of the battery charging. The transmitter H-bridge converter operates in fixed frequency and with full square wave in its output. The transfer from the constant current mode to constant voltage mode is performed through the switching in the receiver side and without the communication path between the transmitter and receiver. The theoretical analysis and design considerations are presented in this paper. The simulation results show good performance of the proposed battery charger along with good compatibility with the theoretical analysis.