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1、怎样查出是电机的问题Howtofindoutistheproblemofelectricmotor,donotwrongthefrequencychanger!一一twosmallexperiencesWheninstallingaconverterforaworkshop'sproductionequipment,itwasafrustratingexperienee.Clearlyismotorisbroken,buttheworkshopdirectornotsayingnotinverter,wanttotrytofindanotherm
2、otor,the"leaders"donotmakeagain,ifthereisnoproblemtocomeupwithfrequencyconverteroftheevidence,thenthedealisonlyothing〃・Here，swhathappened:Someunitforenvironmentalprotectionisunqualified,haltproductionafterafewmonths,toproduction,increaseforadeviceona22kWinverterandmotoris18.5
3、kW,byz，automationcompany"wangtaotoinstallationandcommissioningoftheinvertex・Inverterby63athree-phasepowersupply,introducedaircircuitbreaker,connecttheinverteroutputterminalequipmentonthe18.5kWmotor,afterthewiring,wangtaowasn'tbusysending,blitcheckthecableconnection.,beforecon
4、nectingthemotortotheconnectingcablealsodothemeasurementexamination,anduseinsulatingshaketable,measuringthemotorwindingresistanceofshell(motor),closeto2mQ,conformtotherequirementsoftheinsulation,themotorshouldbenoproblem・Invertex,wangtao,andaccordingtothepowersupplyvoltageandt
5、hemotorratedcurrent,up/stopwayrequirements,settherelatedparametersoffrequencyconverter,thisjuststartinvertertestrun.Hey,there，sananomaly!Thefrequencyconverterstartsatahigherspeedandtheoutputfrequencyshownontheoperatingpanelreachesabove10Hz・Wangtaoswitchesthefrequencydisplayto
6、theoutputcurrent,whilewatchingthemotorrunning・Restarttheinverter,thecurrentvaluegraduallyrise,willsoonreachtheratedcurrent,whenthecurrentrisingformorethan45afrequencyconverteroutageprotection,intheprocess,motorissuedasound,seemstomicroanddidn，tturnup.Isthereatrafficjaminthemo
7、tor?Workshopdirectortoarrangemaintenancepersonnel,toturningdevice,withthehandfeelingrunmorelight,shouldbenoproblemonthemechanical,themaintenancestaffalsodidoillubricationandmaintenanceinthemovingparts・Thereisonlythefrequencychangerandthemotor."Clearlyautomationcompany"doitaCh
8、inesebrandinverterhasbeenforseveralyears,wangtao,siteinstallationand
