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Abstract

This study proposes and analyses the integration of soft-switching technique with a single switch, non-isolated, coupled inductor DC–DC converter to achieve high efficiency and high step-up conversion ratio. The topology optimally integrates the coupled inductor and soft-switching technique using a parallel LC resonant tank circuit to maintain zero-current switching (ZCS) for on/off switching. The leakage inductance of the coupled inductor alleviates the reverse-recovery issue of diodes, and diodes can operate under ZCS condition. Moreover, the converter operates in a lower frequency range due to high step-up voltage gain. The principle of operation and steady-state analyses of the proposed converter are presented. A prototype validates the theoretical analysis and demonstrates a higher peak efficiency of 96.43% than the corresponding hard-switched converter.

Item Type:	Article
Authors/Creators:	Hassan, W and Lu, DD-C and Xiao, W
Keywords:	power converters, DC microgrids, renewable energy
Journal or Publication Title:	IET Power Electronics
Publisher:	The Institution of Engineering and Technology
ISSN:	1755-4535
DOI / ID Number:	https://doi.org/10.1049/iet-pel.2019.0076
Copyright Information:	© The Institution of Engineering and Technology 2019
Related URLs:	Google Scholar: Hassan, W
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