Isolated High-Frequency Link PFC Rectifier with High Step-Down Factor and Reduced Energy Circulation

Andrei Blinov, Dmitri Vinnikov, Enrique Romero-Cadaval, João Martins, Dimosthenis Peftitsis

Research output: Contribution to journalArticlepeer-review


This paper presents an isolated single-stage AC-DC high-frequency link full-bridge cycloconverter (HFLC) with high conversion ratio. Despite certain advantages, such topologies generally suffer from transformer leakage inductance problems and lack of effective modulation methods, particularly in the AC-DC operation mode. In this study, for the input current regulation with the power factor correction (PFC) of the HFLC, a novel phase shift modulation (PSM) method is used. It allows soft-switched turn-off of the DC-side transistors and zero current switching of the AC-side matrix switches without additional circuits or topology modifications. The introduced time-varying regulation of the peak current can be easily implemented; as a result, merely minor energy circulation occurs. Moreover, two of the AC-side transistors operate with fundamental frequency. Design constraints of the concept are analyzed and discussed. For verification, a 1.2 kW 230 VAC to 48 VDC experimental prototype is used.
Original languageEnglish
Number of pages8
JournalIEEE Journal of Emerging and Selected Topics in Industrial Electronics
Publication statusPublished - 2021


  • PFC rectifier
  • AC-DC power converters Energy storage
  • Power supplies
  • Soft switching
  • Zero current switching
  • Zero voltage switching


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