抄録
Contactless power transfer systems with primary series and secondary parallel resonant capacitors (SP topology) are useful for electric vehicle charging. However, SP topology is not suitable for the bidirectional power transfer. In this paper, we propose a new bidirectional contactless power transfer system with a secondary series reactor added to the SP topology's circuit (SPL topology). The experimental results of 3kW bidirectional power transfer are shown to verify the effectiveness of the proposed system. The transformer efficiencies of the SPL topology are 94.4% (G2V) and 94.8% (V2G) against 95.4% of the SP topology at a 70mm gap. Both efficiencies of the SPL topology are consistently high, regardless of the change in the gap length and misalignment.
