Unified Boundary Trapezoidal Modulation Control Utilizing Fixed Duty Cycle Compensation and Magnetizing Current Design for Dual Active Bridge DC-DC Converter

Guo Xu, Deshang Sha*, Jiankun Zhang, Xiaozhong Liao

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

68 Citations (Scopus)

Abstract

The unified boundary trapezoidal modulation (TZM) control utilizing fixed duty cycle compensation and magnetizing current design for dual active bridge dc-dc converter is proposed in this paper. The fixed duty cycle compensation and magnetizing current design are first introduced to achieve the zero voltage switching (ZVS) of the power switches, which cannot be ensured with the conventional TZM control. As a result, all the power switches of dual active dc-dc converter can achieve ZVS and four switches can be turned off with very low current. Besides, based on the revealed power transfer characteristic, the power control variables including the duty cycles and phase-shift ratio can be unified without lookup tables or operation region division. With the proposed boundary TZM control, circulating current losses can be reduced and nonactive power is significantly suppressed according to the mathematic analysis, resulting in decrease of the conduction loss. A 1.6-kW laboratory prototype is built to verify the theoretical analysis and effectiveness of the proposed control.

Original languageEnglish
Article number7454748
Pages (from-to)2243-2252
Number of pages10
JournalIEEE Transactions on Power Electronics
Volume32
Issue number3
DOIs
Publication statusPublished - Mar 2017

Keywords

  • Boundary trapezoidal modulation (boundary TZM control)
  • dual active bridge
  • fixed duty cycle compensation
  • zero voltage switching (ZVS)

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