A Dual-Active-Bridge-Based Single-Phase AC to DC Power Electronic Transformer with Advanced Features

Rohit Baranwal, Gysler F. Castelino, Kartik Iyer, Kaushik Basu, Ned Mohan

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

Power electronic transformers (PETs) offer the advantage of size and weight reduction compared to line-frequency transformers by operating at much higher frequencies than line frequency. In this paper, a push-pull-based ac/dc PET has been proposed and analyzed. The PET offers bidirectional power flow between single-phase ac and dc, using the dual-active bridge principle. Such a system may find applications in interfacing plug-in hybrid and electric vehicles to the grid. The proposed PET offers advantages of open-loop unity power factor operation, soft switching of secondary-side converter power switches for all operating points, high power density owing to use of a high-frequency transformer, and high utilization factor (UF), compared to previous work. Analysis has been done for power transfer, UF, and soft switching. Simulation and experimental results have been provided to demonstrate the operation of the PET.

Original languageEnglish (US)
Article number7855801
Pages (from-to)313-331
Number of pages19
JournalIEEE Transactions on Power Electronics
Volume33
Issue number1
DOIs
StatePublished - Jan 2018

Keywords

  • AC-DC conversion
  • dual-active bridge (DAB)
  • power electronic transformer (PET)
  • power factor correction
  • pulse width modulation (PWM)
  • push-pull
  • soft switching
  • unity power factor

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