Title :
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
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 Vdc and -200 Vdc, as the total output voltage is 400 Vdc 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;
Conference_Titel :
Power Electronics Specialists Conference, 2004. PESC 04. 2004 IEEE 35th Annual
Print_ISBN :
0-7803-8399-0
DOI :
10.1109/PESC.2004.1355241
