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An unity power factor operation symmetrical power supply

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5 Author(s)
Tatibana, S. ; Ericsson Telecom AB, Sao Bernardo, Brazil ; Treviso, C.H. ; Farias, V.J. ; Vieira, J.B.
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This paper presents an AC/DC power converter which can operate as a symmetrical power supply. The AC input voltage and current waveforms are closely in phase and present a very low harmonic distortion. Consequently, the proposed power converter is able to work with unity power factor. A symmetrical output voltage source was obtained by associating Cuk and SEPIC converters using a common input stage. A 500 watts prototype operating at 100 kHz fixed switching frequency was implemented. PSPICE simulation and a laboratory prototype operating with open and closed loops was realized and the results have proved the operating principles of the structure and the implemented control strategy

Published in:

Industrial Electronics, 1997. ISIE '97., Proceedings of the IEEE International Symposium on  (Volume:2 )

Date of Conference:

7-11 Jul 1997