Electric Vehicle-to-Vehicle (V2V) Energy Transfer Using Motor Inverter and Winding

This paper analyzes the electrification of vehicles as one of the best approaches to reducing car emissions. Range anxiety is the main reason that limits the promotion of electric vehicles (EVs). In an emergency, energy transfer from one EV to another EV can alleviate range anxiety as it solves the “last mile” problem. However, the existing vehicle-to-vehicle (V2V) energy-sharing method based on motor inverters and motor windings does not consider efficiency optimization. To address this issue, a new V2V topology that adopts a control method with soft-switching and a lower switching frequency is proposed. The lower switching frequency can effectively reduce the motor core (silicon steel material) loss when the motor winding and core act as an inductor during the V2V power transfer. The proposed system ensures smoother and uninterrupted energy transfer between EVs.

Keywords:  Electric vehicle, Motor inverter, Battery, Vehicle-to-vehicle, Soft-switching, Zero voltage switching.