A high-power-factor, three-phase isolated AC-DC converter using high-frequency current injection

Andrew M. Cross, Andrew J. Forsyth

Research output: Contribution to journalArticlepeer-review


A single-stage, three-phase AC-to-DC converter topology is proposed for high-frequency power supply applications. The principal features of the circuit include continuous current operation of the three AC input inductors, inherent shaping of the input currents, resulting in high power factor, a transformer isolated output, and only two active devices are required, both soft-switched. Resonant conversion techniques are used, and a high power factor is achieved by injecting high-frequency currents into the three-phase rectifier, producing a high frequency modulation of the rectifier input voltages. The current injection principle is explained and the system operation is confirmed by a combination of simulation and experimental results.
Original languageEnglish
Pages (from-to)1012-1019
Number of pages8
JournalIEEE Transactions on Power Electronics
Issue number4
Publication statusPublished - Jul 2003


  • AC-DC power convertors
  • harmonic distortion
  • power conversion harmonics
  • power inductors
  • power supplies to apparatus
  • power supply circuits
  • power transformers
  • rectifying circuits
  • resonant power convertors
  • switching convertors
  • AC input inductors
  • continuous current operation
  • high-frequency current injection
  • high-frequency power supply
  • high-power-factor three-phase isolated AC-DC converter
  • soft-switching resonant power conversion
  • three-phase rectifier
  • transformer isolated output
  • AC-DC power converters
  • bridge circuits
  • circuit topology
  • diodes
  • Inductors
  • power supplies
  • pulse width modulation
  • reactive power
  • rectifiers
  • resonance


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