Soft switching strategy of dynamic wireless charging system for electric vehicles

In this paper, Dynamic wireless charging technology for electric vehicles can continuously charge the moving vehicles, thus reducing the on-board battery capacity and increasing the driving range of the electric vehicles. In order to reduce the power loss and improve the stability of wireless charging system, soft switching technology is generally used in wireless charging system. But the coupling coefficient of dynamic wireless charging system changes frequently, it is difficult to realize soft switching in the whole process of dynamic wireless charging. In order to solve this problem, the condition of soft switching in the dynamic wireless charging system is analyzed. The dual closed loop control strategy is adopted to ensure that the switching tubes of inverter in the wireless power transfer side are always in the soft switching state. Finally, the experimental platform of the dynamic wireless charging system is built to verify the effectiveness of the implementation strategy of soft switching in the dynamic wireless charging system.