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1、.专业整理.毕业设计（外文翻译）题目永磁同步电动机直接转矩控制系统系（院）自动化系专业电气自动化技术学生姓名学号指导教师职称2011年6月15日.学习帮手..专业整理.Alwaysmagneticbeltsynchromotordirecttorquecontrolsystem0-prefaceSynchromotorbecauseofhavingpowerfactorhigher-,run-timeefficiencyhigher-,stabilitygood,therevolvingspeedHengsettlestowaitamerit,is
2、extensivelybeenappliedtoindustrialproductionamid.Thestartingfaultthatacquaintswithsynchromotor,anddebuggingintime,allhaveimportantmeaningtothemotorandtheproductionsystemses.Bywayofenergyintime,accuratedebuggingandtransactionfault,havetovsthefamiliarfaultprogressofthesynchromot
3、orindetailanalytical!1-Familiarfault1.1-ThesynchromotorafterswitchingonelectricitytheincapabilitystartsThesynchromotorafterstartingtheincapabilityrun-timegenerallyhasthereasonofseveralsasfollows:(1)Powersupplyvoltageoverlow.Becauseatthesquareofvoltage,thestartingtorquedirectpr
4、oportionofsynchromotor'sthevoltageofpowersupplyovermakelowthestartingtorqueofsynchromotorsignificantlythedroopislowerthanloadtroque,cannotstartthusandwanttoraisevsthispowersupplyvoltagetoenlargethestartingtorqueofdynamo.(2)Thefaultofmotor.Checkmotorsettle,therotorwindinghadnos
5、hortcircuit,opencirctui,opensolderingand.学习帮手..专业整理.linkbadetc.fault,thesethefaultswillmakethedynamocannotstarttocreatestartingofratingofintensityofmagneticfield,makethusthedynamocannotstart;Checkingthemotorbearinghasalreadyhadnofailure,theportcaphashavenoloose,ifbearingfailur
6、eportshroudloose,resultinbearing'sdownsinking,mutuallyrubwithstatorironcore,resultinthusdynamo'scanningnotstart,vssettletherotorfaultcanbeshakentablewiththelowtension,graduallyclicktochecktoseekafaultconditionandadopthomologoustreatment;Thecountersgaftacceptsandcarriestoshroud
7、alooseconditionandallwantsapancarbeforedrivingeachtimeandseesmotorrotorwhetherslewingisvivid,ifbearingorshaftkiowattdamageandreplaceintime.(1)Thecontroldevicebreaksdown.Thiskindoffaultsaremostlythed.c.outputvoltageofthewindingsofLimagneticbelttoadjustnotappropriateordon'toutpu
8、t,resultinthestatorcurrentofmotoroverbig,causethemotorconduct
