Soft-Switching Bidirectional Isolated Full-Bridge Converter With Active and Passive Snubbers

A bidirectional isolated full-bridge dc-dc converter with a conversion ratio around nine times, soft start-up, and soft-switching features for battery charging/discharging is proposed in this paper. The converter is equipped with an active flyback and two passive capacitor-diode snubbers, which can...

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Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2014-03, Vol.61 (3), p.1368-1376
Main Authors: Wu, Tsai-Fu, Yang, Jeng-Gung, Kuo, Chia-Ling, Wu, Yung-Chun
Format: Article
Language:English
Subjects:
Bidirectional
snubbers
soft switching
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Summary:A bidirectional isolated full-bridge dc-dc converter with a conversion ratio around nine times, soft start-up, and soft-switching features for battery charging/discharging is proposed in this paper. The converter is equipped with an active flyback and two passive capacitor-diode snubbers, which can reduce voltage and current spikes and reduce voltage and current stresses, while it can achieve near zero-voltage-switching and zero-current-switching soft-switching features. In this paper, the operational principle of the proposed converter is first described, and its analysis and design are then presented. A 1.5-kW prototype with a low-side voltage of 48 V and a high-side voltage of 360 V has been implemented, from which measured results have verified the discussed features.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2013.2262746