This digest proposes a frequency quadrupler inverter architecture for high-power high-frequency capacitive WPT systems. The proposed architecture reduces the transistors’ switching frequency by four times compared to the system’s resonant frequency, thereby improving transistor switching performance and reducing high-frequency-dependent losses. The working of the frequency quadrupler architecture is discussed in detail and is supported by analytical and simulation results. A high-power high-frequency capacitive WPT system is designed using the proposed architecture and the tradeoffs and optimizations between the system parameters are studied. Finally, the findings of this study are verified by a prototype 6.78-MHz 12-cm air-gap capacitive WPT system that transfers 300W dc power.
