A Port-Hamiltonian Perspective on Dual Active Bridge Converters: Modeling, Analysis, and Experimental Validation

Yaoqiang Wang, Zhaolong Sun, Peiyuan Li, Jian Ai (), Chan Wu, Zhan Shen and Fujin Deng
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Yaoqiang Wang: Naval University of Engineering, Wuhan 430030, China
Zhaolong Sun: Naval University of Engineering, Wuhan 430030, China
Peiyuan Li: School of Electric Engineering, Southeast University, Nanjing 211189, China
Jian Ai: School of Internet of Things Engineering, Jiangnan University, Wuxi 214122, China
Chan Wu: School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China
Zhan Shen: School of Electric Engineering, Southeast University, Nanjing 211189, China
Fujin Deng: School of Electric Engineering, Southeast University, Nanjing 211189, China

Energies, 2025, vol. 18, issue 19, 1-17

Abstract: The operational stability and performance of dual active bridge (DAB) converters are dictated by an intricate coupling of electrical, magnetic, and thermal dynamics. Conventional modeling paradigms fail to capture these interactions, creating a critical gap between design predictions and real performance. A unified Port-Hamiltonian model (PHM) is developed, embedding nonlinear, temperature-dependent material physics within a single, energy-conserving structure. Derived from first principles and experimentally validated, the model reproduces high-frequency dynamics, including saturation-driven current spikes, with superior fidelity. The energy-based structure systematically exposes the converter’s stability boundaries, revealing not only thermal runaway limits but also previously obscured electro-thermal oscillatory modes. The resulting framework provides a rigorous foundation for the predictive co-design of magnetics, thermal management, and control, enabling guaranteed stability and optimized performance across the full operational envelope.

Keywords: dual active bridge converter; Port-Hamiltonian model; multi-physics coupling; nonlinear magnetics (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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