Design and Optimization of Current-Fed Dual Active Bridge Converter with Dual Coupled-Inductor Structure

Xiaoying Chen, Jun Zhang, Yizhan Zhuang, Yiming Zhang and Jing Guo ()
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Xiaoying Chen: College of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108, China
Jun Zhang: College of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108, China
Yizhan Zhuang: College of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108, China
Yiming Zhang: College of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108, China
Jing Guo: School of Automation, Central South University, Changsha 410083, China

Energies, 2025, vol. 18, issue 21, 1-18

Abstract: In order to reduce magnetic components for a current-fed dual active bridge converter, this paper proposes a dual coupled-inductor (DCI) structure, which integrates two DC inductors, one high-frequency transformer, and one leakage inductor into two EE cores. By analyzing the principle of the magnetic components, a derivation process is presented to modify the current-fed dual active bridge converter. To simplify the design and enhance efficiency, an equal air gap length optimization method is proposed. And the geometric parameters with the highest efficiency are optimized based on losses. Finally, the feasibility and effectiveness of the above design were verified through a 1 kW test prototype.

Keywords: current-fed dual active bridge; dual coupled-inductor structure; equal air gap; loss optimization design (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: 2025
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