Reactance compensation method to eliminate cross coupling for two-receiver wireless power transfer system

Abstract

For wireless power transferred (WPT) system with multi-receiver, the cross coupling effect between non-adjacent coils may seriously impact the performance of the system, decreasing the transferred power and the efficiency. In this paper, a theoretical analysis on the transferred power and the efficiency of two kinds of WPT system models with two-receiver is proposed via circuit theory. Furthermore, a reactance compensatory method is proposed to eliminate the adverse effect brought about by cross coupling, as well as a performance evaluated method introduced for comparing the transferred power and the efficiency before and after compensation. Numerical simulations and experimental results show the transferred power and the performance score are increased remarkably after compensationand it verifies the feasibility of this compensatory method.