Double power MOSFETs high-gain DC–DC topology using two-winding coupled inductor for renewable energy usage

Abstract

High-voltage DC–DC converters are critical components of numerous renewable-energy systems. Input current and voltage gain are crucial factors to consider while designing these converters. This article suggests a high-step-up DC–DC topology. Utilizing a magnetic-coupling-based voltage multiplier approach, the suggested converter achieves significant voltage gain while minimizing switch voltage stress. Furthermore, a boost inductor at the input ensures continuous input current, making it useful for battery, fuel cell, and solar energy systems. In addition, the MOSFETs are switched at zero voltage, yielding low switching losses, and the coupled inductor is biased toward zero DC, which results in a small magnetic area and lower core losses. The proposed converter's operating regulations, performance studies, and design challenges are discussed. To confirm the calculations made in theory, a test was performed with a 20 V input and a 230 V output, providing an output power of 425 W.