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1、2013FifthConferenceonMeasuringTechnologyandMechatronicsAutomationFaultDetectionofStatorWindingInterturnShortCircuitinPMSMbasedonWaveletPacketAnalysisZhengAn-ping,YangJuan,WangLingSchoolofElectricalandInformationEngineering,ZhengzhouUniversityofLightInd
2、ustryZhengZhou450002,Chinazheng_an_ping@163.com,yjxuexi@126.com,wangling1145@sohu.comAbstract—Inthispaper,themethodofwaveletpackettransformanalysisisproposed,accordingtotheshortcomingsut2hku2tk2nnofFouriertransformanalysismethodwhenthefaultdete
3、ctionkz(1)ofpermanentmagnetsynchronousmotor(PMSM)isstudied.ThestatorcurrentsignalofPMSMisdecomposedbywaveletu2n1t2gkun2tkpacket,thenthesignalenergyeigenvaluesoffrequencybandskzareanalyzed.ThesimulationresultshowsthatthemethodofThesignalisdec
4、omposedtoproperfrequencybandbywaveletpackettransformanalysiscanwellcharacterizetheusingwaveletpackettransform,thenfrequencybandoffaultfeaturesofthestatorwindinginter-turnshortcircuit.signalisdividedprecisely.Thesignalenergyofeachfrequencybandisregarded
5、aseigenvectorsoffault,whichisKeywords-PMSM;FaultDetection;WaveletPacketcalledthewaveletpacketfrequencybandenergyanalysisTransformmethod.Becausethewaveletpacketdecompositionisorthogonal,I.INTRODUCTIONthebandsignalisindependent,redundantandnoleakage,andi
6、tfollowsthelawofenergyconservation,sotheThePMSMhasalotofadvantagessuchashighpowertheoreticalbasisaboutfrequencybandanalysisofwaveletdensities,highefficiencyandconstantpoweradjustedspeedpacketistheParsevaltheorem.The2-normoforiginalsignalratios,soitiswi
7、delyusedinthefieldwhichrequiredhighfxonL2Ris:safetyandreliability,forinstance,aviation,spaceflightandwarindustryetc.Itisveryimportanttofindpotentialfaults2ffxdx(2)ofPMSMtimely,whichcanensuresafeproduction[1-4].2RUsually,faultfeaturesarealwaysinva
8、rioussigns,andfault22typesarealsovaried.theratioofstatorwindinginter-turnthen?f2Rfxdx(3)shortcircuitfaultisabout30%to40%.IfitisallowedtoByformula(3),itisknownthatthe2-norm’ssquareofcontinuallydevelop,thentheinsulatingmaterialsofwavele
