Efficiency optimization approach for dual active bridge DC-DC converter

作者：Kai Wang, Ying Jiang, Xuecou Tu · 发表于：Journal of Physics Conference Series · 年份：2025 · DOI：10.1088/1742-6596/3087/1/012010 · 研究领域：Advanced DC-DC Converters、Multilevel Inverters and Converters、Silicon Carbide Semiconductor Technologies

Abstract To reduce the current stress of a dual active bridge dc-dc (DAB) converter, this paper puts forward a current stress optimization (CSO) approach in extended-phase-shift (EPS) control. This paper established two typical switching mode mathematical models of the converter, combined with the Karush-Kuhn-Tucker (KKT) optimality condition, to derive the optimum value of phase-shift parameters for minimizing current stress. On this basis, a proportional-integral (PI) closed-loop controller is adopted to achieve real-time dynamic adjustment of two phase-shift parameters, thereby completing optimal control of minimizing inductor current stress. Finally, comparison experiments in Simulink simulation show that in contrast to traditional single-phase-shift (SPS) control, EPS control and the proposed CSO approach simultaneously minimize inductor current stress while maximizing power transfer efficiency.