CUED Publications database

A fixed-frequency bidirectional resonant DC-DC converter suitable for wide voltage range

Shen, Y and Wang, H and Blaabjerg, F and Durra, AA and Sun, X (2017) A fixed-frequency bidirectional resonant DC-DC converter suitable for wide voltage range. In: UNSPECIFIED pp. 2084-2090..

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Abstract

This paper proposes a new bidirectional resonant dc-dc converter suitable for wide voltage gain range applications (e.g., energy storage systems). The proposed converter overcomes the narrow voltage gain range of conventional resonant DC-DC converters, and meanwhile achieves high efficiency. It is realized by configuring a full-bridge mode and a half-bridge mode operation during each switching cycle. The fixed-frequency phase-shift control schemes are applied and the normalized voltage gain can be always from 0.5 to 1, regardless of the load. The transformer root-mean-square (RMS) currents in both the forward and the reverse modes have a negligible variation with respect to the voltage gain, which is beneficial to low conduction losses throughout a wide voltage range. Moreover, the applied MOSFETs are soft-switched, allowing for minimum switching losses. Both the operation principles and characteristics of the proposed converter are analyzed. Finally, a 1-kW converter prototype is built and the experimental results verify the theoretical analyses.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Subjects: UNSPECIFIED
Divisions: UNSPECIFIED
Depositing User: Cron Job
Date Deposited: 13 Mar 2019 20:32
Last Modified: 10 Apr 2021 00:32
DOI: 10.1109/APEC.2017.7930986