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1、I2MTC2008-IEEEInternationalInstrumentationandMeasurementTechnologyConferenceVictoria,VancouverIsland,Canada,May12-15,2008SimulationandFaultDetectionofShortCircuitWindinginaPermanentMagnetSynchronousMachine(PMSM)bymeansofFourierandWaveletTransform.J.Rosero,A.G.Espinosa
2、.J.Cusido,J.A.Ortega,L.Romeral.MotionControlandIndustrialApplications,GroupMCIA,TechnicalUniversityofCatalonia,C/Colom1Tr2-225.08222Terrassa,Catalonia.Spain,e-mail:romeral@eel.upc.eduAbstract-Thispaperpresentspermanentmagnetthesimulationofelectricalmachineswithshortci
3、rcuitfault.synchronousmachineswithshortcircuitofturns.Two-FEAanalysisrevealsitselflikeanaccurateaneasymethoddimensional(2-D)finiteelementanalysis(FEA)isusedtotodeterminetheinteractionbetweennon-lineareffects.simulationofPMSMunderfault.PMSMisworkingatnominalconditionan
4、dspeedchangeof5000rpm.RelationshipsbetweenPMSMinahealthystateandwithshortcircuitturnsarestator-current-inducedharmonicswereinvestigatedbymeanssimulatedatdifferentworkingpointsusingatwo-ofFourier(FFT)anddiscreteWaveletTransforms(DWT).Thedimensional(2-D)finite-elementan
5、alysissoftware(FLUXsimulationisalsocomparedwithexperimentalresults.2D).ThePMSMworkbenchforFEAanalysisisshowninIndexTerms-Shortcircuit,winding,fault,Wavelet,Fig.1.CurrentspatternsandtheirharmonicscontentsareFourier,Drive,PMSM,fault,speedchange,FEA.obtained.Inaddition,t
6、heseharmonicsofthePMSMwithfaultsiscomparedwithahealthymotor.ThedynamicstatorI.INTRODUCTION.currentwasinvestigatedbymeansofdiscreteWaveletShortcircuitbetweenturnsisthemostcriticalfaultintheTransforms(DWT).Thesimulationisalsocomparedwithmachine,andisquitedifficulttodete
7、ctandalmostexperimentalresultsimpossibletoremove.Thesefaultsareusuallyshortcircuitsbetweenaphasewindingandthegroundorbetweentwoi"~....I'l.1phases.Itisstronglybelievedthatsuchfaultsinitiateas,PM2,@FeWundetectedturn-to-turnfaultsthatdeveloptoamajorshortrlwm~~~~~FwntkFlu
8、Q0W)circuit.Statorwindingfaultsmighthaveadestructiveeffectonthestatorcoils[1].Thereareanumberoftechniquestodetectturn-to-tur
