Contactless Power Supply with resonant inverter, soft switching transistors and unity power factor

In this paper the theory and experimental results of the Contactless Power Supply (CPS) system are presented. The system comprises of an input rectifier, an inverter with a rotary transformer connected to his output and an output rectifier. To the output of the inverter are connected capacitors, which form resonant circuits with the inductances of the transformer. Transistors in the inverter are in a soft switching mode: ZVS and simultaneously almost ZCS. The research was carried out for different lengths of air gap between the parties of the transformer and for different smoothing filters capacity in the input and output of the system.