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Abstract This article introduces a high step-up DC-DC converter based on a three-winding coupled-inductor (3WCI). A 3WCI has been combined with voltage multiplier cells (VMCs) to enhance the voltage conversion ratio without increasing the number of components. As a result, the proposed converter's gain-to-element (G2E) ratio has been improved. In addition, high voltage gains are obtained in the proposed converter with low voltage stress on active and passive components, small footprint, and high efficiency. This article thoroughly discusses the operational modes, steady-state performance, and design process, and conducts a comparison between the proposed converter and its counterpart circuits. Moreover, a 240W, 22V/240V prototype has been fabricated. Experimental results validate the operation and performance of the converter, demonstrating that the proposed converter achieves a high voltage gain with only 10 components. The proposed topology outperforms in terms of the G2E ratio. Additionally, the experiments indicate that the maximum voltage stress on devices (MVSD) is reduced, by up to 60% of the output voltage. The practical efficiency of the converter under full load conditions is measured at 96.2%.
Hajiabadi et al. (Mon,) studied this question.