A novel quadratic cascaded coupled inductor high gain DC-DC converter

Abstract

This paper proposes a high step-up DC-DC converter with a quadratic cascaded coupled inductor. The primary and secondary sides of the coupled inductor are connected in series, and the secondary side of the coupled inductor is combined with the voltage multiplier cell. The main advantages of the converter include high voltage gain, low voltage stress on power switches, continuity of input current, and the common ground between the source and load. The performance of the proposed converter is experimented with using a 220W prototype that converts 25V from the input side to 426V on the output side. The peak efficiency is up to 94.77%.