Enhanced Zero-Voltage-Switching Conditions of Dual Active Bridge Converter under Light Load Situations

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Abstract

Generally, power electronic converters are designed to obtain the highest efficiency at the rated power while they are partially loaded during most of their operation time. For dual active bridge (DAB) converters, the zero-voltage-switching (ZVS) is prone to failure in light load situations, where precise ZVS conditions are needed but the commonly used current-based and energy-based methods are not good enough to characterize the operating boundaries of the ZVS realization. In this paper, based on the practical turn-on procedure, an improved calculation method of the ZVS condition is introduced here. The method mainly focuses on analyzing the transient procedure during the dead time, by taking into account the non-linearity of the parasitic output capacitance of the transistors. Also, comparative experimental results are shown to validate the feasibility of the analysis.
Original languageEnglish
Title of host publication35th Annual IEEE Applied Power Electronics Conference & Exposition (APEC 2020)
Number of pages8
PublisherIEEE Press
Publication dateJun 2020
Pages1374-1381
Article number9124213
ISBN (Print)978-1-7281-4830-4
ISBN (Electronic)9781728148298
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
  • loss estimation
  • zero voltage switching

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