Title :
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
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;
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
DOI :
10.1109/IECON.1993.339145
