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Single Switch Non-Isolated High Gain DC-DC Converter for PV Applications

A novel high gain DC-DC converter is proposed in this paper. It comprises of a coupled inductor, one switch, three diodes and four capacitors. A voltage multiplier is used which increases the system voltage gain and stored energy in leakage inductance of coupled inductor is reused with the help of auxiliary circuit reducing voltage spikes across switch. Due to high conversion ratio, the voltage stress across devices gets reduced. Zero-current switching turn on is also achieved across MOSFET. This further reduce conduction losses, and improves reverse recovery problems thereby improving efficiency. The detailed steady state analysis is outlined. Simulation results are presented for validation.