Phase shift control dual active bridge converter with integrated magnetics

Article type: Research Article

Authors: Gao, Shengwei^{a; b; *} | Wang, Hao^{a; b} | Tarafdar, Kishor^{a; b}

Affiliations: [a] Key Laboratory of Advanced Electrical Engineering and Energy Technology, Tianjin, China | [b] College of Electrical Engineering, Tiangong University, Tianjin, China

Correspondence: [*] Corresponding author: Shengwei Gao, Key Laboratory of Advanced Electrical Engineering and Energy Technology, Tianjin, China. E-mail: [email protected].

Abstract: Traditional dual active bridge converters use transformer leakage inductance instead of energy storage inductors for magnetic integration, but this method cannot accurately control the leakage inductance. A phase shift control dual active bridge converter base on integrated magnetics is proposed, in which one transformer and one inductor are integrated in an EE core. The size of the inductance can be accurately controlled. The transformer and the inductor are decoupled and integrated so that the two operating states do not affect each other. The weight and volume of the magnetic elements are reduced accordingly. The finite element analysis and magnetic circuit simulation of the integrated magnetics are carried out. Finally, the integrated magnetics are designed and applied to the 600W prototype to realize bidirectional power transmission and a weight reduction is about 36.24% and a volume reduction is about 35.84%. The correctness of the design is verified by experimental results.

Keywords: Integrated magnetics, dual active bridge, gyrator-capacitor model, the finite element method

DOI: 10.3233/JCM-204132

Journal: Journal of Computational Methods in Sciences and Engineering, vol. 20, no. 3, pp. 727-742, 2020