A coaxial dual-receiver wireless power transfer system with bipolar coils to eliminate cross-coupling and achieve a controllable power distribution

Abstract

This paper proposes a dual-receiver wireless power transfer system that uses bipolar coils as a transmitter and receivers. Compared with a traditional dual-receiver system with unipolar coils, the proposed system can effectively and conveniently eliminate cross-coupling between the receivers, and another significant feature of the system is the ease of changing the received power of the two receiver loads by changing the relative angle of the bipolar coils. The mutual inductance of the bipolar coils is modelled by Newman’s formula. Then a system design method to eliminate the influence of cross-coupling and realize controllable power allocation is proposed.