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

Volume

1

fYear

1997

fDate

3-6 Aug 1997

Firstpage

335

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Conversion Conference - Nagaoka 1997., Proceedings of the

Conference_Location

Nagaoka

Print_ISBN

0-7803-3823-5

Type

conf

DOI

10.1109/PCCON.1997.645635

Filename

645635