Simulation of zvs cuk converter using psim

A Zero Voltage Switching (ZVS)Cuk converter is presented in this paper to reducethe switching losses of main switch. An auxiliaryswitch and a clamp capacitor are connected inparallel with the main switch to absorb all theenergy stored in the leakage inductance of thetransformer. The ZVS operation of main switch isachieved by the resonance with the resonantinductor and output capacitor of main switch. TheZVS operation of auxiliary switch is achieved bythe resonance with the resonant inductor and theclamp capacitor. Therefore, both switches areturned on at ZVS. The principle of operation,system analysis and design consideration arepresented. Finally, simulations based on an 270W(18V/15A) are provided for the proposedconverter. Keywords— Zero Voltage switching (ZVS) Cukconverter; Active clamp technique; Soft switching ______________________________________________________________________________________________________________