A Comparative Review of High-Frequency Transient DC Bias Current Mitigation Strategies in Dual-Active-Bridge DC-DC Converters under Phase-Shift Modulations

Qinglei Bu, Huiqing Wen*, Haochen Shi, Yinxiao Zhu

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

32 Citations (Scopus)

Abstract

Dual-active-bridge (DAB) converters have been widely recognized as one promising topology for high-frequency-link power conversion applications. However, one critical issue concerning DAB converters is the transient dc-bias current due to the voltage-second imbalance, which may occur frequently in typical dynamic operations of DAB converters such as the start-up, sudden load or output voltage change, and power flow direction change. Due to the high-frequency operation, the dc-bias current of DAB converters will impose more harm to magnetic components because of the limited range of operating flux density and possible magnetic saturation compared with the counterpart low-frequency dc-bias current. Over the past several years, extensive researches have been conducted to address the high-frequency transient dc-bias current of DAB converters under different phase-shift modulation strategies such as single phase shift, extended phase shift, and triple phase shift. In this article, a comparative review of typical dc-bias current mitigation strategies under typical phase-shift strategies for DAB converters is presented. An experimental evaluation of selected strategies under various scenarios is conducted in terms of the settling time, inductor current stress, efficiency, switching number, and implementation complexity. This article ends up with an overview of high-frequency dc-bias mitigation strategies and a discussion for the further optimization.

Original languageEnglish
Pages (from-to)2166-2182
Number of pages17
JournalIEEE Transactions on Industry Applications
Volume58
Issue number2
DOIs
Publication statusPublished - 2022

Keywords

  • Dual-active-bridge (DAB) converter
  • current stress
  • dc-bias current
  • high-frequency link
  • phase-shift control
  • transient
  • Phase modulation
  • Switches
  • Topology
  • Steady-state
  • Inductors
  • Stress
  • Transient analysis

Fingerprint

Dive into the research topics of 'A Comparative Review of High-Frequency Transient DC Bias Current Mitigation Strategies in Dual-Active-Bridge DC-DC Converters under Phase-Shift Modulations'. Together they form a unique fingerprint.

Cite this