Secondary‐Side Switching Control for Efficient Constant‐Current Dynamic Wireless Charging

Charge current and system efficiency are highly dependent on the load and mutual inductance, which change quickly during the dynamic wireless charging process, as the relative position between the primary coil and the secondary coil changes very fast. Due to the parameter tolerance and drift of the capacitor and inductor, the system detuning can also affect the charging current and system efficiency. This paper presents a novel switching‐based secondary‐side control strategy for dynamic wireless electric vehicle (EV) charging, aimed at achieving precise constant current (CC) charging and optimizing system efficiency under varying mutual inductance conditions. By dynamically adjusting the conduction angle ( ϕ ) and phase shift ( θ ) of the semiactive rectifier, the proposed method effectively eliminates secondary‐side reactance, ensuring stable power transfer and high energy efficiency. An adaptive resonance tracking mechanism further enhances system performance by mitigating detuning effects caused by component tolerances and load variations. Extensive theoretical analysis, simulations, and experimental validation demonstrate that the proposed strategy achieves 92% system efficiency, ±0.05 A charging current fluctuation, and a rapid 3‐ms response time, outperforming conventional approaches. These results validate the effectiveness of the proposed control method in improving charging stability, enhancing energy transfer efficiency, and ensuring robust operation in dynamic wireless EV charging scenarios, making it a promising solution for future wireless power transfer applications.