An Improved Vehicle-to-Vehicle Wireless Power Transfer System for Electric Vehicle Applications Using Reconfigurable Two-Phase Transmitter

Vehicle-to-vehicle (V2V) energy transfer is a necessary topology in the Electric Vehicle (EV) charging field. The connectivity between EVs using rigid cables adds difficulties while making the connectivity due to its weight. The recent advancements in Wireless power transfer (WPT) technology give comfortable connectivity between EVs for energy sharing. In WPT, the coupling between the transmitter pad (TP) and the receiver pad (RP) plays a noticeable role in the power transfer efficiency (PTE) and transmission distance. In this article, a reconfigurable two-phase circular transmitter pad improves the coupling factor (K). The impact of the proposed two-phase coil on the coupling factor is verified with the ANSYS-MAXWELL simulation tool. The cross-coupling effects due to the dual transmitter are minimized by phase-shifted excitation of the relay coil and capacitor. An improvement of 4.7% in PTE has been achieved in the implemented charging system with two-phase coil-based WPT by performing the energy sharing between two 24V, 28Ah batteries.