Bridgeless high-power-factor buck-converter operating in discontinuous capacitor voltage mode

Abbas A. Fardoun, Esam H. Ismail, Nasrullah M. Khraim, Ahmad J. Sabzali, Mustafa A. Al-Saffar

Research output: Contribution to journalArticlepeer-review

46 Citations (Scopus)


In this paper, a new bridgeless single-phase ac-dc power factor correction (PFC) rectifier based on buck topology operating in discontinuous capacitor voltage mode (DCVM) is proposed. The bridgeless topology and the presence of only one or two semiconductor switches in the current flowing path during each interval of the switching cycle result in lower conduction losses compared with the conventional DCVM buck PFC rectifier. The DCVM operation offers additional advantages such as zero-voltage turn-off in the power switches, zero-voltage turn-on in the output diode, and continuous input current. Hence, the electromagnetic interference noise emission is minimized. The converter achieves high power factor naturally with low total harmonic distortion in the input current. Theoretical analysis and experimental results for 100 W/48 Vdcat 100 Vrmsline voltage are provided to evaluate the performance of the proposed scheme. The measured conversion efficiency reached 96.3%.

Original languageEnglish
Article number6737244
Pages (from-to)3457-3467
Number of pages11
JournalIEEE Transactions on Industry Applications
Issue number5
Publication statusPublished - Sept 1 2014


  • Discontinuous capacitor voltage mode (DCVM)
  • Electromagnetic interference (EMI)
  • Power factor correction (PFC)
  • Total harmonic distortion (THD)

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering


Dive into the research topics of 'Bridgeless high-power-factor buck-converter operating in discontinuous capacitor voltage mode'. Together they form a unique fingerprint.

Cite this