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

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...

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Bibliographic Details
Main Authors: Tofoli, F.L., Gallo, C.A., Scarpa, V.V.R., Coelho, E.A.A., de Freitas, L.C., Farias, V.J., Vieira, V.B.
Format: Conference Proceeding
Language:English
Subjects:
Applied sciences
Circuit properties
Circuits
Convertors
Electric, optical and optoelectronic circuits
Electrical engineering. Electrical power engineering
Electrical machines
Electronic circuits
Electronic equipment and fabrication. Passive components, printed wiring boards, connectics
Electronics
Exact sciences and technology
Feedback
Power electronics, power supplies
Power factor correction
Power generation
Power supplies
Reactive power
Signal convertors
Switched-mode power supply
Switching converters
Transformers
Voltage
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Description
Summary: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/sub dc/ and -200 V/sub dc/, as the total output voltage is 400 V/sub dc/ and the total output power is 500 W. Power factor correction IC UC3854 is employed in the control strategy of the boost stage.
ISSN:0275-9306
2377-6617
DOI:10.1109/PESC.2004.1355241