Vehicle-to-Vehicle Inductive Power Transfer: Design Analysis and Topology Selection

This paper presents an inductive power transfer (IPT) system for vehicle-to-vehicle (V2V) charging applications utilizing an intermediate coil. Two different intermediate coil structures are discussed and compared, which shows that a concentrated winding brings a higher mutual inductance. Furthermore, different matching networks, namely series-series-series (SSS) and LCC-S-LCC, are analyzed for the V2V IPT application. The analysis shows that by properly selecting compensation factors, the LCC-S-LCC topology can provide higher and more stable efficiency than the former counterpart. In addition, power flow analysis has been performed, which shows the relation between transferred power and phase angle between input and output inverter's voltage. As a result, the phase angle is utilized to control the power flow between the two EVs. PLECS simulations are performed to verify the proposed concept and analysis.