Zero Voltage Switching Criteria of Triple Active Bridge Converter

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Abstract

Triple active bridge (TAB) as an isolated multi-port converter is a promising integrated energy system for smart grids or electric vehicles. This paper aims to derive and analyse zero voltage switching (ZVS) regions of TAB, in which both switching losses are reduced, and EMI issues are mitigated. In the proposed closed-form solution of ZVS criteria, parameters such as the parasitic capacitance of the switches, the leakage inductance of the transformer, the switching frequency, the port voltage, the phase-shift inside and between the full-bridges are all taken into account. The analysis shows how the five degrees of freedom can be used to maintain ZVS operation in various operating points. The analysis and derived closed-form ZVS criteria are experimentally verified using a laboratory prototype. The derived analytical ZVS criteria are a powerful tool to study and optimise the operation of TAB converters.
Original languageEnglish
Pages (from-to)5425-5439
Number of pages14
JournalIEEE Transactions on Power Electronics
Volume36
Issue number5
DOIs
Publication statusPublished - 2020

Keywords

  • bidirectional power flow
  • dc-dc converters
  • triple active bridge
  • smart grids
  • zero voltage switching

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