CC–CV Wireless EV Charging Using Hamiltonian-Based Control on Voltage Mode Primary-side and Current Mode Secondary-side Buck Converters

This paper presents a nonlinear Hamiltonian-based control law designed to achieve constant current–constant voltage (CC–CV) operation in inductive wireless electric vehicle (EV) charging systems, under the fluctuation of changing load. This paper presents the design of a Hamiltonian control law for the primary-side buck converter (PS-Buck) operating as a voltage source and for the secondary-side buck converter (SS-Buck) operating as a current source. In addition, a design for generating the desired set-point signal is proposed to enable more straightforward and efficient CC–CV charging control. The results confirm that the Hamiltonian controller enables both converters to achieve stable CC–CV charging at 10 A and 80 V. The PS-Buck provides a faster transient response (20 ms), minimal overshoot, and a peak power efficiency of 90% at 768 W with the SS-Buck. These findings highlight the controller's potential for deployment in high-performance wireless EV charging infrastructures.