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Realization of High-Efficiency Dual-Active-Bridge Converter with Reconfigurable Multilevel Modulation Scheme
Chan, Y. P.1; Yaqoob, M.2; Wong, C. S.3; Loo, K. H.1
2020-06-01
Source PublicationIEEE Journal of Emerging and Selected Topics in Power Electronics
ISSN2168-6777
Volume8Issue:2Pages:1178-1192
Abstract

Efficiency optimization of dual-Active-bridge (DAB) converters involves the minimization of both conduction and switching losses. However, it is challenging to achieve these two objectives simultaneously due to their conflicting nature, i.e., circulating current is required to realize zero-voltage switching (ZVS) but the presence of an excessive amount of the circulating current is the main cause of conduction loss and low efficiency. This dilemma has been common to conventional DAB converter topologies and modulation schemes which cannot provide sufficient degrees of freedom (DoFs) to the design of their operation modes. This paper is an illustration of the merits of utilizing reconfigurability of the operation mode as a new DoF in designing the operation of DAB converters to minimize both conduction and switching losses. The proposed DAB converter is designed to switch between two operation modes. For 25%-100% of the rated output power, a new modulation scheme based on the four-level ac voltages is proposed to achieve zero circulating current, zero backflow power, and full-range ZVS. Below 25% of the rated output power, the new modulation scheme transitions smoothly to the enhanced dual-phase-shift (EDPS) modulation scheme that continues to achieve zero backflow power and full-range ZVS while the incurred circulating current is moderated by operating the ac voltages at half-Amplitude. The experimental results obtained from a 2-kW prototype show that, in comparison to conventional modulation schemes, the proposed modulation scheme is capable of maintaining the highest efficiency over the full output power range and greatly improves the reliability of switches due to full-range ZVS operation.

KeywordBidirectional Converter Dual-active-bridge (Dab) Converter Immittance Network Resonant Converter Softswitching
DOI10.1109/JESTPE.2019.2926070
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaEngineering
WOS SubjectEngineering, Electrical & Electronic
WOS IDWOS:000534642200022
Scopus ID2-s2.0-85084742790
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Cited Times [WOS]:4   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Corresponding AuthorChan, Y. P.
Affiliation1.Department of Electronic and Information Engineering, Hong Kong Polytechnic University, Hong Kong, Hong Kong
2.Huawei Research Center, Stockholm, Sweden
3.State Key Laboratory of Internet of Things for Smart City, University of Macau, Macao
Recommended Citation
GB/T 7714
Chan, Y. P.,Yaqoob, M.,Wong, C. S.,et al. Realization of High-Efficiency Dual-Active-Bridge Converter with Reconfigurable Multilevel Modulation Scheme[J]. IEEE Journal of Emerging and Selected Topics in Power Electronics,2020,8(2):1178-1192.
APA Chan, Y. P.,Yaqoob, M.,Wong, C. S.,&Loo, K. H..(2020).Realization of High-Efficiency Dual-Active-Bridge Converter with Reconfigurable Multilevel Modulation Scheme.IEEE Journal of Emerging and Selected Topics in Power Electronics,8(2),1178-1192.
MLA Chan, Y. P.,et al."Realization of High-Efficiency Dual-Active-Bridge Converter with Reconfigurable Multilevel Modulation Scheme".IEEE Journal of Emerging and Selected Topics in Power Electronics 8.2(2020):1178-1192.
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