An ultra high gain Double switch quadratic boost coupled inductor based converter

Abstract

This essay presents a new high step-up converter based on coupled-inductor and voltage doubler-rectifier. The output voltage of the topology is enhanced by increasing duty cycle. Recycling the energy of leakage inductances can help to reduce the voltage spikes on the power switches. For this reason, we can use a switch with low drain to source resistance. The output diode of this converter is turned off in zero current switching condition due to the leakage inductances. In this converter when the duty cycle and turn ratios are 0.57 and 1 respectively, the voltage gain is around 22. A comparison of the proposed converter with a conventional quadratic converter with similar characteristics was also performed. The results indicate that the proposed converter is more efficient than the traditional converter and can achieve ultra high voltage gain without working at extreme duty cycle.