An Enhanced Generalized Average Modeling of Dual Active Bridge Converters

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Abstract

An enhanced generalized average modeling (GAM) method for a dual active bridge (DAB) converter is presented in this paper. Firstly, the conventional lossless model is introduced and it is shown that this model might cause a non-neglectable steady state error. In order to improve the modeling accuracy, a wide range of loss sources are involved in the proposed enhanced GAM model, such as conduction losses and core losses. On this basis, this paper further proves that the 3 rd-order harmonic component of the leakage inductance current should be considered to reduce steady state errors in light load conditions, while others might only consider the 1 st-order harmonic in the existing DAB models. Also, a universal form of the modeling equation to include up to any h th-order harmonic component is derived. Finally, comparative simulation and experimental results are presented to validate the feasibility of the analysis.

Original languageEnglish
Title of host publicationProceedings of 35th Annual IEEE Applied Power Electronics Conference & Exposition (APEC 2020)
Number of pages6
PublisherIEEE Press
Publication dateJun 2020
Pages85-90
Article number9124001
ISBN (Electronic)978-1-7281-4829-8
DOIs
Publication statusPublished - Jun 2020
Event2020 IEEE Applied Power Electronics Conference and Exposition (APEC) - New Orleans, LA, United States
Duration: 15 Mar 202019 Mar 2020

Conference

Conference2020 IEEE Applied Power Electronics Conference and Exposition (APEC)
CountryUnited States
CityNew Orleans, LA
Period15/03/202019/03/2020
SeriesI E E E Applied Power Electronics Conference and Exposition. Conference Proceedings
ISSN1048-2334

Keywords

  • dual active bridge
  • generalized average modeling

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