Mode on Power Distribution of a Dynamic Dual Pickup Wireless Charging System for Electric Vehicles

Abstract

Power distribution is critical for the dynamic dual receiver coil wireless charging system of electric vehicles. The power distribution method of the existing wireless power transmission technology mainly distributes the power to the load according to the requirements of different resonant frequencies. However, the existing methods have the problems of low accuracy and low power consumption, so it is difficult to implement in practice. This paper presents a new power distribution method, which can dynamically and accurately distribute power to loads. This method can improve the control speed of the receiving circuit without additional circuit on the receiving side, and realize constant power output and efficiency optimization at the same time when there is no communication connection with the transmitter. Therefore, it is easy to realize in the wireless charging system of electric vehicle with dual receiver coil. The experimental results show that the load-side output power of the dynamic radio energy transmission system can be kept constant when moving, and the maximum efficiency of the output system reaches 91.38%. The experimental results prove the effectiveness of the proposed control method.