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1、Alwaysmagneticbeltsynchromotordirecttorquecontrolsystem0-prefaceSynchromotorbecauseofhavingpowerfactorhigherrun-timeefficiencyhigherstabilitygood,therevolvingspeedHengsettlestowaitamerit,isextensivelybeenappliedtoindustrialproductionamid.Thestartingfaultthatacquaintswithsynchromotor,anddebugg
2、ingintime,allhaveimportantmeaningtothemotorandtheproductionsystemses-Bywayofenergyintime,accuratedebuggingandtransactionfault,havetovsthefamiliarfaultprogressofthesynchromotorindetailanalytical!1・FamiliarfaultLI-ThesynchromotorafterswitchingonelectricitytheincapabilitystartsThesynchromotoraft
3、erstartingtheincapabilityrun-timegenerallyhasthereasonofseveralsasfollows:(1)Powersupplyvoltageoverlow.Becauseatthesquareofvoltage,thestartingtorquedirectproportionofsynchromotor'sthevoltageofpowersupplyovermakelowthestartingtorqueofsynchromotorsignificantlythedroopislowerthanloadtroque,canno
4、tstartthusandwanttoraisevsthispowersupplyvoltagetoenlargethestartingtorqueofdynamo.(2)ThefaultofmotorCheckmotorsettle,therotorwindinghadnoshortcircuit,opencirctui,opensolderingandlinkbadetc.fault,thesethefaultswillmakethedynamocannotstarttocreatestartingofratingofintensityofmagneticfield,make
5、thusthedynamocannotstart;Checkingthemotorbearinghasalreadyhadnofailure,theportcaphashavenoloose,ifbearingfailureportshroudloose,resultinbearing^downsinking,mutuallyrubwithstatorironcore,resultinthusdynamo'scanningnotstart,vssettletherotorfaultcanbeshakentablewiththelowtension,graduallyclickto
6、checktoseekafaultconditionandadopthomologoustreatment;Thecountersgaftacceptsandcarriestoshroudalooseconditionandallwantsapancarbeforedrivingeachtimeandseesmotorrotorwhetherslewingisvivid,ifbearingorshaftkiowattdamageandreplaceintime.(1)Thecontroldevicebreaksdown.Thiskindoffaultsaremostlythed.
7、c.outputvoltageofthewindingsofLimagneticbelttoadjustnotappropriateordon'toutput,resultinthestatorcurrentofmotoroverbig,causethemotorconductelectricitytherunmakeorthelosingofdynamomagneticbeltrun-time.Shouldcheckwhetheroutputvoltagecurrentandi
