Design and Analysis of Class Φ Inverters in the Wireless Power Transfer

Wireless power transfer systems have been widely studied, especially in 13.56MHz. This paper presents a framework for modeling, analysis, and design a Class
$-\Phi$
Inverter, a single switch topology with low switch voltage stress and fast transient. Building upon this foundation, a compensation topology was introduced to enhance the smoothness of the circuit's output voltage and achieve load-independent characteristics. Subsequently, simulation analysis and verification were conducted using L Tspice. The results show that Class
$\Phi$
inverter with SS compensation can improve the smoothness of the output waveform, have better filtering effect, and have a lower impact on the output voltage as the resistance changes.