Generalized small-signal modelling of dual active bridge DC/DC converter

Osama M. Hebala, Ahmed A. Aboushady, Khaled H. Ahmed, Sam Burgess, Radhakrishna Prabhu

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

6 Citations (Scopus)
21 Downloads (Pure)

Abstract

this paper presents a novel generalised approach of the small-signal modelling of dual active bridge (DAB) DC/DC converter. The adopted analysis is based on a per-unit fundamental frequency representation of the DAB. The outcome of the proposed modelling approach is a small signal, linearised, state-space DAB model; which is considered as a main building block for future control applications. The developed small signal DAB model includes all possible degrees of freedom affecting the performance of the DAB; this includes the voltage conversion ratio to allow the study of all DAB operation modes (i.e.: unity-gain and buck/boost modes.). Furthermore, since triple phase shift control (TPS) is used in this development work, the proposed model incorporates phase shift in addition to duty ratios. This feature allows for bridge voltage regulation, which is essential for efficient DAB operation in the case of buck/boost operation. Another key achievement is that the proposed small signal modelling methodology can be applied to any bidirectional DC-DC converter regardless of ratings, parameter values and number of ports. Extensive simulation is carried out to verify the proposed analysis.

Original languageEnglish
Title of host publication7th International IEEE Conference on Renewable Energy Research and Applications, ICRERA 2018
Place of PublicationPiscataway, NJ
PublisherIEEE
Pages914-919
Number of pages6
ISBN (Electronic)9781538659823
DOIs
Publication statusPublished - 10 Dec 2018
Event7th International IEEE Conference on Renewable Energy Research and Applications, ICRERA 2018 - Paris, France
Duration: 14 Oct 201817 Oct 2018

Conference

Conference7th International IEEE Conference on Renewable Energy Research and Applications, ICRERA 2018
CountryFrance
CityParis
Period14/10/1817/10/18

Keywords

  • dual active bridge (DAB)
  • triple phase shift (TPS)
  • DC/DC converter

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  • Cite this

    Hebala, O. M., Aboushady, A. A., Ahmed, K. H., Burgess, S., & Prabhu, R. (2018). Generalized small-signal modelling of dual active bridge DC/DC converter. In 7th International IEEE Conference on Renewable Energy Research and Applications, ICRERA 2018 (pp. 914-919). [8567014] IEEE. https://doi.org/10.1109/ICRERA.2018.8567014