Modulation of 2/3-Level Dual-Active-Bridge DC-DC Converters for Soft-Switching and Minimum Current Stress

Chaochao Song, Yongheng Yang*, Zhongting Tang, Frede Blaabjerg

*Corresponding author for this work

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

6 Citations (Scopus)

Abstract

This paper proposes an optimal modulation scheme for two-three (2/3)-level dual-active-bridge (DAB) DC-DC converters to guarantee zero-voltage-switching (ZVS) operation and minimize the current stress. Based on the unified ZVS principle, six operating modes are defined and constraints of each ZVS mode are then obtained. According to the operating modes, the power transmission model and current stress under all voltage conversion ratios are derived for optimization. The analytical solutions for minimum current stresses are obtained by using the Lagrange multiplier method with Karush-Kuhn-Tucker conditions. With the proposed modulation scheme, both the conduction and switching losses can be reduced, and thus, the entire efficiency can be improved. Finally, simulation results verify the theoretical analysis and the performance of the optimal modulation scheme.
Original languageEnglish
Title of host publicationIECON 2020 The 46th Annual Conference of the IEEE Industrial Electronics Society
Number of pages6
PublisherIEEE
Publication dateNov 2020
Pages2913-2918
ISBN (Print)978-1-7281-5415-2
ISBN (Electronic)978-1-7281-5414-5
DOIs
Publication statusPublished - Nov 2020
EventIECON 2020 - 46th Annual Conference of the IEEE Industrial Electronics Society - Online
Duration: 18 Oct 202021 Oct 2020
https://www.iecon2020.org/

Conference

ConferenceIECON 2020 - 46th Annual Conference of the IEEE Industrial Electronics Society
LocationOnline
Period18/10/202021/10/2020
Internet address
SeriesProceedings of the Annual Conference of the IEEE Industrial Electronics Society
ISSN1553-572X

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