Design Considerations for Voltage Sensorless Control of a PFC Single-Phase Rectifier Without Electrolytic Capacitors

Wenlong Qi, Sinan Li, Siew-Chong Tan, S. Y. Ron Hui

Research output: Contribution to journalArticle

1 Citation (Scopus)
22 Downloads (Pure)


In this paper, a voltage sensorless controller is developed for a two-switch single-phase rectifier that involves power factor correction and active pulsating power buffering without electrolytic capacitors. While a two-switch rectifier normally requires four sensed signals for control, only one current sensor is required in this proposal, thereby offering advantages such as low cost, high compactness, isolation between control and power circuits, and improved reliability. While the basic operating principle follows that of a conventional voltage sensorless controller for single-switch converters, several critical design considerations are the key to the success of the implementation which is explained in detail. The feasibilities of the controller are experimentally testified with a 100-W rectifier prototype regarding both steady state and dynamic performance.

Original languageEnglish
Pages (from-to)1878-1889
Number of pages12
JournalIEEE Transactions on Industrial Electronics
Issue number3
Early online date15 Mar 2019
Publication statusPublished - 1 Mar 2020


  • Power decoupling
  • single-phase ac-to-dc converters
  • two-switch rectifier
  • voltage sensorless control

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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