A new ZVT high step up DC-DC converter

This paper proposes a new soft switching high step up converter without any auxiliary switch. because of high voltage gain the proposed converter has low voltage stress on power switch, power diodes and output capacitors. The simple auxiliary circuit is applied to high step up converter for providing soft switching condition and also to increase voltage gain a flyback converter is combined to boost converter. In the proposed converter switch turns on under ZCS condition and turns off under almost ZVS condition. This converter controlled by PWM signal, so implementation of control circuit is very simple. Simulation results are introduced to verify theoretical analysis.