Open AccessSwitching strategy for isolated dual‐active‐bridge converter
Author(s) -
Wang Hui,
Yan Kun,
Ling Zhixiang,
Gan Jinhao
Publication year - 2017
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2015.0916
Subject(s) - transformer , pulse width modulation , control theory (sociology) , voltage , dual (grammatical number) , root mean square , half bridge , square root , bridge (graph theory) , power (physics) , computer science , engineering , control (management) , electrical engineering , mathematics , capacitor , physics , medicine , art , literature , geometry , quantum mechanics , artificial intelligence
The operating characteristics of a dual‐active‐bridge (DAB) converter are generally poor when using the single‐phase‐shift (SPS) control strategy while working with a light load or when the input voltage and the output voltage are not matched with the transformer ratio. To improve DAB operating characteristics when working under such undesirable conditions, a novel one‐side single half‐bridge pulse‐width‐modulation plus phase‐shift (HPPS) switching strategy is proposed in this study. The operational principle of the strategy is demonstrated, and a suitable power mathematical model is also established. Based on this model, a detailed contrast analysis is conducted to compare HPPS control with SPS control, and includes zero‐voltage‐switching range comparison, circulating power comparison and root‐mean‐square current value comparison. A laboratory prototype is constructed, and the validity and feasibility of the proposed HPPS control strategy is verified by the experimental results.