Wireless Power Transfer Based Vehicle to Two Vehicle (V22V) Charging

Resonant Inductive Coupling (RIC) Wireless Power Transfer (WPT) technologies allow for the simultaneous charging of multiple Electric Vehicles (EVs) even as they drive. In such configurations, vehicle receivers often encounter magnetic cross-coupling. This cross-coupling not only complicates receiver control but also significantly diminishes the output power of each receiver. To enhance the output power, this paper presents a compensation method designed to counteract the effects of cross-coupling. Preliminary analysis of the requirements to compensate for cross-coupling indicates that controlling the current phase in each receiver, ensuring it's orthogonal to the phase of the transmitter current, is crucial. This method effectively compensates for the interference brought about by cross-coupling. Magnetic and power transfer simulations for various charging modes are conducted using ANSYS Maxwell and MATLAB/Simulink®, respectively. Experimental validation of the proposed method involves a 2 kW transmitter coil and two 1 kW receiver coils, demonstrating the Vehicle-to-Two-Vehicles (V22V) WPT.