A Fixed-Frequency Bidirectional Resonant DC-DC Converter Suitable for Wide Voltage Gain Range

Publication: Research - peer-reviewArticle in proceeding

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.
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Details

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.
Original languageEnglish
Title of host publicationProceedings of the 2017 IEEE Applied Power Electronics Conference and Exposition (APEC)
Number of pages7
PublisherIEEE Press
Publication dateMar 2017
Pages2084-2090
ISBN (print)978-1-5090-5366-7
DOI
StatePublished - Mar 2017
Event2017 IEEE Applied Power Electronics Conference and Exposition (APEC) - Tampa, FL, United States

Conference

Conference2017 IEEE Applied Power Electronics Conference and Exposition (APEC)
LocationTampa Convention Center
LandUnited States
ByTampa, FL
Periode26/03/201730/03/2017

    Keywords

  • Bidirectional dc-dc converter, Resonant converter, Wide gain range
ID: 245349677