PWM control of dual active bridge: Comprehensive analysis and experimental verification

Amit Kumar Jain, Raja Ayyanar

Research output: Contribution to journalArticle

323 Scopus citations

Abstract

The dual-active-bridge (DAB) topology is ideally suited for high-power dc-dc conversion, especially when bidirectional power transfer is required. However, it has the drawback of high circulating currents and hard switching at light loads, if wide variation in input and output is expected. To address these issues, this paper presents a comprehensive analysis and experimental results with pulsewidth-modulation (PWM) control of the DAB. The PWM control is in addition to phase-shift modulation between the two H-bridges. The analysis addresses PWM of one bridge at a time and of both bridges simultaneously. In the latter, five distinct modes arise based on the choice of PWM and load condition. The possibilities are analyzed for optimizing power density and efficiency for low-load operation. Finally, a composite scheme combining single and dual PWM is proposed that extends the soft-switching range down to zero-load condition, reduces rms and peak currents, and results in significant size reduction of the transformer. Experimental results are presented with a 10-kW prototype.

Original languageEnglish (US)
Article number5559483
Pages (from-to)1215-1227
Number of pages13
JournalIEEE Transactions on Power Electronics
Volume26
Issue number4
DOIs
StatePublished - Jun 20 2011

Keywords

  • Bidirectional converters
  • dc-dc conversion
  • pulsewidth modulation (PWM)
  • soft switching

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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