A Soft-Switched Power-Factor-Corrected Single-Phase Bidirectional AC-DC Wireless-Power-Transfer Converter with An Integrated Power Stage

Junwei Liu, Fei Xu, Chuan Sun, K. H. Loo

Research output: Journal article publicationJournal articleAcademic researchpeer-review

22 Citations (Scopus)

Abstract

Bidirectional ac-dc wireless power transfer (WPT) converters are widely used in grid-connected electric vehicle systems for grid-to-vehicle and vehicle-to-grid applications. They usually apply a two-stage topology with a bidirectional ac-dc power factor correction converter and a bidirectional dc-dc WPT converter. Such a two-stage topology cannot achieve high efficiency and low cost. Recently, single-stage matrix bidirectional ac-dc WPT converters have been proposed. However, the matrix-converter-based topologies do not utilize remarkably lower count of power switches and generate large double-line frequency ripple in the dc-side voltage or current. This article proposes a new single-phase bidirectional ac-dc WPT topology with an integrated power stage to overcome the drawbacks of the matrix-converter-based topologies and retain the advantages of single-stage topologies. Description of the proposed topology with the modulation and control methods, theoretical analysis, and reference design procedure are presented in detail. Finally, a scaled-down laboratory prototype with 500-W output power is implemented with experimental results presented to validate the principle, analysis, and design.

Original languageEnglish
Article numberArticle number 9729414
Pages (from-to)10029-10044
Number of pages16
JournalIEEE Transactions on Power Electronics
Volume37
Issue number8
DOIs
Publication statusPublished - 1 Aug 2022

Keywords

  • AC-DC
  • bidirectional
  • integrated power stage
  • wireless power transfer (WPT)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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