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http://dx.doi.org/10.6113/TKPE.2017.22.2.159

Study on Small-signal Modeling and Controller Design of DC-DC Dual Active Bridge Converters  

Lee, Won-Bin (School of Electrical & Computer Eng., UNIST)
Choi, Hyun-Jun (School of Electrical & Computer Eng., UNIST)
Cho, Jin-Tae (KEPCO Research Institute)
Jung, Jee-Hoon (School of Electrical & Computer Eng., UNIST)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.22, no.2, 2017 , pp. 159-165 More about this Journal
Abstract
Small-signal modeling and controller design methodology are proposed to improve the dynamics and stability of a DC-DC dual active bridge (DAB) converter. The state-space average method has a limitation when applied to the DAB converter because its state variables are nonlinear and have zero average values in a switching period. Therefore, the small-signal model and the frequency response of the DAB converter are derived and analyzed using a generalized average method instead of conventional modeling methods. The design methodology of a lead-lag controller instead of the conventional proportional-integral controller is also proposed using the derived small-signal model. The accuracy and performance of the proposed small-signal model and controller are verified by simulation and experimental results with a 500 W prototype DAB converter.
Keywords
DAB(Dual Active Bridge) converter; Small signal model; Controller design; Generalized average model; Dynamic performance;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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