Variable-On-Time-Controlled Critical-Conduction-Mode Flyback PFC Converter

Author

Tiesheng Yan ; Jianping Xu ; Fei Zhang ; Jin Sha ; Zheng Dong

Author_Institution

Key Lab. of Magnetics Suspension Technol. & Maglev Vehicle, Southwest Jiaotong Univ., Chengdu, China

Volume

61

Issue

11

fYear

2014

fDate

Nov. 2014

Firstpage

6091

Lastpage

6099

Abstract

A variable on-time (VOT) control strategy for a critical conduction mode (CRM) flyback power factor correction (PFC) converter with low total harmonic distortion (THD) and high power factor (PF) is proposed in this paper. By using input voltage and the voltage across the auxiliary winding of the flyback transformer to modulate the turn-on time of the switch of the CRM flyback PFC converter, the PF and THD of the converter can be improved. The operation principles of the traditional constant on-time (COT)-controlled CRM flyback PFC converter and VOT-controlled CRM flyback PFC converter are analyzed. The experimental results show that the PF and THD of the VOT-controlled CRM flyback PFC converter are better than those of the COT-controlled CRM flyback PFC converter.

Keywords

AC-DC power convertors; electric current control; harmonic distortion; power conversion harmonics; power factor correction; voltage control; VOT control strategy; auxiliary winding; constant on-time control; critical conduction mode converter; flyback PFC converter; flyback transformer; power factor correction converter; total harmonic distortion; variable-on-time-control; Customer relationship management; Frequency conversion; Switches; Switching frequency; Voltage control; Windings; Critical conduction mode (CRM); flyback converter; power factor correction (PFC); total harmonic distortion (THD); variable on-time (VOT);

fLanguage

English

Journal_Title

Industrial Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0278-0046

Type

jour

DOI

10.1109/TIE.2014.2311401

Filename

6766207