Design and evaluation of a reconfigurable stacked active bridge dc/dc converter for efficient wide load-range operation

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R. Abramson, S. Gunter, D. Otten, K.K. Afridi, and D.J. Perreault, “Design and Evaluation of a Reconfigurable Stacked Active Bridge dc/dc Converter for Efficient Wide Load-Range Operation,” IEEE Applied Power Electronics Conference, 2017.
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Author(s)
Afridi, Khurram K.
•
Abramson, Rose A.
•
Gunter, Samantha Joellyn
•
Otten, David M
•
Perreault, David J
Date Issued
May 2017
Journal
Applied Power Electronics Conference and Exposition (APEC), 2017 IEEE
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Citation
Abramson, Rose A., Samantha J. Gunter, David M. Otten, Khurram K. Afridi, and David J. Perreault. “Design and Evaluation of a Reconfigurable Stacked Active Bridge Dc/dc Converter for Efficient Wide Load-Range Operation.” 2017 IEEE Applied Power Electronics Conference and Exposition (APEC) (March 2017).
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Author's final manuscript
Abstract
This paper presents the design and implementation of a large-step-down soft-switched dc-dc converter based on the active bridge technique which overcomes some of the limitations of the conventional Dual Active Bridge (DAB) converter. The topology comprises a double stacked-bridge inverter coupled to a reconfigurable rectifier through a special three-winding leakage transformer. This particular combination of stages enable the converter to run in an additional low-power mode that greatly increases light-load efficiency by reducing core loss and extending the zero-voltage switching (ZVS) range. The converter is implemented with a single compact magnetic component, providing power combining, voltage transformation, isolation, and energy transfer inductance. A 175 kHz, 300 W, 380 V to 12 V GaN-based prototype converter achieves 95.9% efficiency at full load, a peak efficiency of 97.0%, an efficiency above 92.7% down to 10% load and an efficiency above 79.8% down to 3.3% load.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Research Laboratory of Electronics
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DOI of Published Version
http://dx.doi.org/10.1109/APEC.2017.7931183
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