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Wide voltage-gain range asymmetric H-bridge bidirectional DC-DC converter with common ground for energy storage systems

Zhang, Yun; Gao, Yongping; Li, Jing; Sumner, Mark

Authors

Yun Zhang

Yongping Gao

Jing Li

MARK SUMNER mark.sumner@nottingham.ac.uk
Professor of Electrical Energy Systems



Abstract

A wide-voltage-conversion range bidirectional DC-DC converter is proposed in this paper. The topology is comprised of one typical LC energy storage component and the special common grounded asymmetric H-bridge with four active power switches/anti-parallel diodes. The narrow output PWM voltage is generated from the voltage difference between two normal (wider) output PWM voltages from the asymmetric H-bridge with duty cycles close to 0.5. The equivalent switching frequency of the output PWM voltage is double the actual switching frequency, and a wide step-down/step-up ratio range is achieved. A 300W prototype has been constructed to validate the feasibility and effectiveness of the proposed bidirectional converter between the variable low voltage side (24V~48V) and the constant high voltage side (200V). The slave active power switches allow ZVS turn-on and turn-off without requiring any extra hardware, and the maximum conversion efficiency is 94.7% in the step-down mode and 93.5% in the step-up mode. Therefore, the proposed bidirectional topology with a common ground is suitable for energy storage systems for example for renewable power generation systems or electric vehicles with a hybrid energy source.

Citation

Zhang, Y., Gao, Y., Li, J., & Sumner, M. (2018). Wide voltage-gain range asymmetric H-bridge bidirectional DC-DC converter with common ground for energy storage systems. doi:10.6113/JPE.2018.18.2.343

Journal Article Type Article
Acceptance Date Oct 15, 2017
Online Publication Date Mar 15, 2018
Publication Date Mar 20, 2018
Deposit Date Mar 21, 2018
Journal Journal of Power Electronics
Electronic ISSN 1598-2092
Peer Reviewed Peer Reviewed
Volume 18
Issue 2
DOI https://doi.org/10.6113/JPE.2018.18.2.343
Public URL http://eprints.nottingham.ac.uk/id/eprint/50570
Publisher URL http://www.jpels.org/archives/view_articles.asp?seq=1524
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf