Energies, Vol. 18, Pages 5722: Design and Optimization of Current-Fed Dual Active Bridge Converter with Dual Coupled-Inductor Structure

Energies, Vol. 18, Pages 5722: Design and Optimization of Current-Fed Dual Active Bridge Converter with Dual Coupled-Inductor Structure

Energies doi: 10.3390/en18215722

Authors:
Xiaoying Chen
Jun Zhang
Yizhan Zhuang
Yiming Zhang
Jing Guo

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.