Title :
Low cost power factor correction (PFC) converter using delay control
Author :
Lee, K.C. ; Cho, B.H.
Author_Institution :
Dept. of Electr. Eng., Seoul Nat. Univ., South Korea
Abstract :
A low cost universal input voltage (90~264 V) power factor correction (PFC) converter for a 200 W power supply in a personal computer (PC) is proposed. It consists of the PFC part followed by a DC-DC power converter as in a conventional two-stage scheme. However a single PWM controller is used as in a single-stage, single-switch PFC scheme. The switch in the PFC part is synchronized with the switch in the DC-DC power converter and it has a fixed frequency. Employing a simple delay scheme using the pulse and feedback signal of the DC-DC power converter, the PFC switch is controlled to limit the capacitor voltage within a range for the optimum efficiency and cost. A tradeoff study shows that it indeed offers better efficiency and cost reduction compared to single switch approaches for this power level. The design procedure and experimental results are presented
Keywords :
AC-DC power convertors; DC-DC power convertors; SPICE; circuit analysis computing; computer power supplies; control system analysis computing; delay systems; feedback; power engineering computing; power factor correction; rectifying circuits; software packages; voltage control; 200 W; 90 to 264 V; DC-DC power converter; PSpice; capacitor voltage limitation; computer simulation; control design; control simulation; delay scheme; experimental results; feedback signal; personal computer power supply; power factor correction; pulse feedback signal; rectifiers; single PWM controller; Costs; DC-DC power converters; Delay; Frequency synchronization; Microcomputers; Power factor correction; Power supplies; Pulse width modulation; Switches; Voltage;
Conference_Titel :
Power Conversion Conference - Nagaoka 1997., Proceedings of the
Conference_Location :
Nagaoka
Print_ISBN :
0-7803-3823-5
DOI :
10.1109/PCCON.1997.645635
