A Reduced Switch Count Single-Stage Three-Phase Bidirectional Rectifier with High-Frequency Isolation

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

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


Dual active bridge (DAB) based converters offer the benefit of smaller volume due to high-frequency isolation and controllability of active power flow, making them attractive for various applications, such as renewable energy generation, plug-in hybrid vehicles, and distribution systems. This paper presents a novel converter topology along with a modulation strategy for a DAB-based three-phase ac to dc converter. The major benefits are single-stage conversion, no unreliable intermediate dc-link capacitor, reduced number of switches, i.e., only two active switches on the ac side, simple control scheme, open-loop unity power factor operation, bidirectional power flow, and partial soft-switching. This paper presents the analysis of all the operating modes of the converter, resulting in the analytical estimation of power transfer and rms winding current and investigation of soft-switching conditions for the power devices. Simulation and experimental results have been presented to demonstrate the advantages of the proposed technique and accuracy of the analysis.

Original languageEnglish (US)
Article number8249523
Pages (from-to)9520-9541
Number of pages22
JournalIEEE Transactions on Power Electronics
Issue number11
StatePublished - Nov 2018


  • Dual active bridge (DAB)
  • high-frequency (HF) link
  • isolated converter
  • power electronic transformer (PET)
  • single stage
  • soft switching
  • solid-state transformer (SST)
  • unity power factor
  • zero current switching (ZCS)
  • zero voltage switching (ZVS)


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