Design and Experimental Verification of SP-Type Resonant Wireless Power Transfer System Capable of Bidirectional Power Transmission

Abstract

In this paper, we propose the system of SP-type resonant circuit with the DAB DC-DC converter for the wireless power transfer. We derive a novel non-tight transformer circuit and its equation, which isn't using turn ratio parameters, to design for our proposed system. Using this derived circuit equation and a method of designing to system parameters, we fabricated an experimental apparatus which is SPtype wireless power transfer. We confirmed that our experimental apparatus with a wireless power transfer rated at 1000 VA works. The proposed system can high power by a phase difference of the inverter AC voltage is phased and realize bidirectional power transfer.