Generalized Average Modeling of Dual Active Bridge DC-DC Converter
Full-order continuous-time average modeling and dynamic analysis of bidirectional dc-dc dual active bridge (DAB) converters are studied. The transformer current in DAB converter is purely ac, making continuous-time modeling difficult. The proposed full-order continuous-time average model uses the dc terms and first order terms of transformer current and capacitor voltage as state variables, resulting in a third-order model, if capacitor equivalent series resistance (ESR) is not considered, and a sixth-order model if ESR is considered. A control-to-output-voltage transfer function is derived for DAB converters. Experimental results confirm that the proposed model correctly predicts the small-signal frequency response and an even more accurate prediction can be obtained if capacitor ESR is taken into account.
H. Qin and J. W. Kimball, "Generalized Average Modeling of Dual Active Bridge DC-DC Converter," IEEE Transactions on Power Electronics, vol. 27, no. 4, pp. 2078-2084, Institute of Electrical and Electronics Engineers (IEEE), Apr 2012.
The definitive version is available at http://dx.doi.org/10.1109/TPEL.2011.2165734
Electrical and Computer Engineering
Keywords and Phrases
Accurate Prediction; Average Model; Average Modeling; Bidirectional DC-DC Converters; Capacitor Voltages; Continuous Time; Dual Active Bridge Converter; Dual Active Bridges; Equivalent Series Resistance; First Order; Phase Shift Modulation; State Variables; Third-Order; Transformer Currents; Phase Shift Modulation; Capacitors; Continuous Time Systems; DC Transformers; Electric Resistance; Frequency Response; DC-DC Converters; Bidirectional DC-DC Converter
International Standard Serial Number (ISSN)
Article - Journal
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