A Dual Half-Bridge Converter with Adaptive Energy Storage to Achieve ZVS over Full Range of Operation Conditions

Lei Zhao, Chuangyu Xu, Xuemei Zheng and Haoyu Li
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Lei Zhao: School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150-001, China
Chuangyu Xu: School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150-001, China
Xuemei Zheng: School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150-001, China
Haoyu Li: School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150-001, China

Energies, 2017, vol. 10, issue 4, 1-10

Abstract: The phase-shifted full-bridge (PSFB) converter is widely employed in high-power applications. However, circulating current, duty-cycle loss, secondary voltage oscillation, and narrow zero-voltage-switching (ZVS) range are the main drawbacks of the conventional PSFB converter. This paper proposes a novel full-bridge converter to improve the performance of the conventional PSFB converter. The proposed converter contains two paralleled half-bridge inverters and an auxiliary inductor on the primary side. The rectifier stage is composed of six diodes connected with the form of full-bridge rectification. This structure allows the stored energy for ZVS operation to change adaptively with duty-cycle. The power can be transferred from the primary side to the secondary side during the whole period. Therefore, the requirement of output filter inductance is reduced and the circulating current is removed. The proposed converter is a good candidate for high power, high voltage and variable input voltage applications. The operation principle and performance are verified on a laboratory prototype.

Keywords: phase-shifted full-bridge (PSFB); adaptive energy storage; circulating current; duty-cycle loss; zero-voltage-switching (ZVS) (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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