Title :
An unity power factor operation symmetrical power supply
Author :
Tatibana, G.S. ; Treviso, C.H. ; Farias, V.J. ; Vieira, J.B., Jr. ; de Freitas, L.C.
Author_Institution :
Ericsson Telecom AB, Sao Bernardo, Brazil
Abstract :
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
Keywords :
AC-DC power convertors; SPICE; circuit analysis computing; harmonic distortion; power supplies to apparatus; power system harmonics; rectifying circuits; software packages; switching circuits; 150 kHz; 500 W; AC input current waveform; AC input voltage waveform; AC/DC power converter; Cuk converters; PSPICE; SEPIC converters; circuit simulation; computer simulation; low harmonic distortion; operating principles; switching frequency; symmetrical power supply; unity power factor operation; Analog-digital conversion; Harmonic distortion; Laboratories; Power supplies; Prototypes; Reactive power; SPICE; Switching frequency; Virtual prototyping; Voltage;
Conference_Titel :
Industrial Electronics, 1997. ISIE '97., Proceedings of the IEEE International Symposium on
Conference_Location :
Guimaraes
Print_ISBN :
0-7803-3936-3
DOI :
10.1109/ISIE.1997.649029
