A high power factor power supply employing a self-oscillating converter to supply control circuitry

Author

Tofoli, Fernando L. ; Gallo, Carlos A. ; Scarpa, Vladimir V R ; Coelho, Ernane A A ; De Freitas, Luiz Carlos ; Farias, Valdeir J. ; Vieira, Jofio Batista, Jr.

Author_Institution

Dept. of Electr. Eng., Uberlandia Federal Univ., Brazil

Volume

4

fYear

2004

fDate

2004

Firstpage

2600

Abstract

This paper proposes a symmetrical switched-mode power supply which employs a self-oscillating converter as auxiliary power to supply control and drive circuits. It is composed of a preregulator boost converter applied to two dc-dc forward converters in order to provide power factor correction. They operate at 100 kHz and the individual output voltages are equal to +200 V_dc and -200 V_dc, as the total output voltage is 400 V_dc and the total output power is 500 W. Power factor correction IC UC3854 is employed in the control strategy of the boost stage.

Keywords

DC-DC power convertors; driver circuits; power factor correction; switched mode power supplies; 100 kHz; 200 to -200 V; 400 V; 500 W; control circuitry supply; dc-dc forward converters; drive circuits; high power factor power supply; power factor correction; self-oscillating converter; symmetrical switched-mode power supply; Circuits; Feedback; Power factor correction; Power generation; Power supplies; Reactive power; Switched-mode power supply; Switching converters; Transformers; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialists Conference, 2004. PESC 04. 2004 IEEE 35th Annual

ISSN

0275-9306

Print_ISBN

0-7803-8399-0

Type

conf

DOI

10.1109/PESC.2004.1355241

Filename

1355241