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000000035 037__ $$aENY-ARTICLE-2008-028
000000035 041__ $$aeng
000000035 100__ $$aLeonowicz, Z$$uWroclaw University of Technology Pl. Grunwaldzki 13, 50370 Wroclaw, Poland
000000035 245__ $$aTime-frequency analysis of non-stationary three phase signals
000000035 260__ $$c2002-06-21
000000035 300__ $$a5p
000000035 500__ $$a 15th Triennial World Congress of the International Federation of Automatic Control   Barcelona, 21–26 July 2002 paper no 302
000000035 520__ $$aNew  method  of  observation  and  diagnosis  of  inverter-fed  induction  motor  drives  is  developed  and  tested.  Unsymmetrical  conditions  concerning  the  machine  impedances  or  valves  operation  are  reflected  in  the  spectrum  of  the  current  space- phasor. We estimate the spectrum of the space-phasor with the help of the Wigner-Ville  distribution (WVD) and we obtain its time-frequency representation with excellent time  and  frequency  resolution. The  proposed method  is  tested with nonstationary multiple- component  signals  occurring  during  the  fault  operation  of  inverter-fed  drives  and  transmission lines. Copyright © 2002 IFAC 
000000035 6531_ $$aspectrum estimation
000000035 6531_ $$afrequency conversion
000000035 6531_ $$apower systems
000000035 6531_ $$asignal analysis 
000000035 6531_ $$atime-frequency representation
000000035 700__ $$aLobos, T$$uWroclaw University of Technology Pl. Grunwaldzki 13, 50370 Wroclaw, Poland
000000035 8560_ $$fzbigniew.leonowicz@pwr.wroc.pl
000000035 8564_ $$uhttp://zet10.ipee.pwr.wroc.pl/record/35/files/$$zAccess to Fulltext
000000035 909CO $$ooai:zet10.pwr.wroc.pl:35$$pglobal
000000035 980__ $$aARTICLE