Simulation and performance of modified coupled inductor based sepic converter with high static gain

Abstract

This paper proposes amodified SEPIC converter in coupled inductor based high gain dc-dc converter. The proposed topology presents low switch voltage and high efficiency for low input voltage, low ripple current and high output voltage applications. Two alternatives with and without magnetic coupling are analyzed. The magnetic coupling allows increasing the static gain with a reduced switch voltage. The theoretical analysis and experimental results are presented. The efficiency obtained with the prototype without magnetic coupling was 81%, 83.2%.With magnetic coupling85.5% was improved to nominal output power. Efficiency equal to 85% was obtained with the prototype model.