Design of power factor corrector for the off-line isolated buck/boost converter by a voltage-follower technique

Author

Hsieh, Guen-Chyun ; Tsai, Jeng-Feng ; Mao-Fu Lai ; Li, Jung-chien

Author_Institution

Dept. of Electron. Eng., Nat. Taiwan Inst. of Technol., Taipei, Taiwan

fYear

1993

fDate

15-19 Nov 1993

Firstpage

959

Abstract

A voltage-follower controller (VFC) formed by the usual PWM controller is proposed that improves the power factor of the isolated buck/boost (flyback) power converter in the discontinuous conduction mode (DCM). The presented VFC can adaptively control the line current in phase with the input line voltage to achieve nearly unity power factor under the full-load condition. An isolated 50 W buck/boost power converter with VFC in DCM is realized that improves the power factor to 0.994

Keywords

electric current control; filters; network synthesis; power convertors; power factor; power factor correction; power system harmonics; 50 W; PWM controller; circuit design; discontinuous conduction mode; flyback power converter; input line voltage; isolated buck/boost power converter; line current control; unity power factor; voltage-follower technique; Capacitors; Circuit topology; Inductors; Magnetic separation; Power supplies; Pulse width modulation; Pulse width modulation converters; Reactive power; Switching converters; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics, Control, and Instrumentation, 1993. Proceedings of the IECON '93., International Conference on

Conference_Location

Maui, HI

Print_ISBN

0-7803-0891-3

Type

conf

DOI

10.1109/IECON.1993.339145

Filename

339145