永磁同步电动机英文翻译.docx

永磁同步电动机英文翻译.docx

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永磁同步电动机英文翻译

英文原文

ResearchonVoltageSpace-vectorControlSystemofSynchronousMotor

Vectorcontroloffieldorientedcontrol,thebasicideais:

throughcoordinatetransformationcontrolmethodforsimulationofDCmotortocontrolthepermanentmagnetsynchronousmotor.Three-phasesymmetricalwindingsinthree-phaseACcanproducearotatingmagneticmotiveforce,twophasesymmetricalwindingsintotwosymmetricalternatingcurrentcanproducethesamerotatingmagnetometiveforce;thereforethethree-phasesymmetricwindingcanbereplacedwithtwophasesymmetricalwindingsequivalentindependentofeachother,equivalentprincipleistheconstantmagnetomotiveforceproducedbeforeandaftertransformation,transformationandtotalpowerconstant.

Inoilfield,thepowerfactorwasreducedandthereactivepowerconsumptionwasincreasedbecauseoftheusageofthelargenumberofasynchronousmotor,andresultinginahugewasteofenergy,whichreducedtheintegratedcost-effectiveoffield.Thepermanentmagnetsynchronousmotorpossessalltheadvantagesofsynchronousmotorandithashighefficiencyandhigherpowerfactor.Fortheadvantagesofpermanentmagnetsynchronous,itwillbringgoodenergysavingresultsifitisusedinpumpingunit.Asaresult,thestudyonpermanentmagnetsynchronousmotorcontrolsystemisimportant.

InthispaperthetheoryofvectorcontrolsystemonPMSMisfirstdeeplystudied,andtheideaofcoordinatetransformationisusedtobuildthemathematicalmodelofPMSM.Anin-depththeoreticalanalysisofvoltagespacevectorcontrolalgorithmisdone.Secondly,basedonthemathematicalmodelofpermanentmagnetsynchronousmotorandSVPWMtheory,themodelofPMSMvectorcontrolsystemisestablishedbyofMatlab/Simulink.Thesimulationresultshowsthepossibilityofusingthecontrolsystem.

Inthepaper,thesoftwareandhardwareofPMSMvectorcontrolsystemisdesignedcore-basedTICompany’smotorcontrolDSPchipTMS320LF2407A.Hardwarencludesthemaincircuit,controlcircuitanditsperipheralcircuits;softwarecontainsthemainprogramandSVPWMinterruptsubroutine,itachievestheimplementationofthedualclosed-loopcurrent.Atlast,themotorexperimentsarecarriedonunderthelaboratory,theexperimentalresultsverifythecorrectnessofthehardwareandcontrolprogram.

Permanentmagnetsynchronousmotorwiththeadvantagesofsimplestructure,highefficiency,widespeedrange,widelyusedinmachining,aerospaceandelectrictractionfields,thispaperintroducesthestructure,controlstrategyofpermanentmagnetsynchronousmotoranditsvectortorquecontrolresearchpresentsituationanddirection.

Basedonspacevectorprinciple,thethreekindofcoordinatesystemsaswellasthetransformationofthemwhichusuallyusedinmotor’sspeedcontrolsystemareintroduced,then,themathematicmodelsondifferentcoordinatesystemsarederived,bebasedonthat,theprincipleoftraditionaldirecttorquecontrolsystemaswellasthedirecttorquecontrolsystembasedonSVPWMareanalyzeddetailed,meanwhile,therealizationprocessofSVPWMalgorithmisderived.Finally,thesimulationmodelofconvientionalDTCControlsystemareestablishedinMATLAB/Simulink.

Controlofpermanentmagnetsynchronousmotormainlyinthefollowing

1.1vectorcontrol

Thecoreideaofvectorcontrolofthree-phasecurrent,voltage,thefluxofthemotorbycoordinatetransformationintotherotorfluxorientedphasereferencecoordinatesystem,controlideaaccordingtoDCmotor,controlmotortorque.Theadvantagesofthefieldorientedvectorcontrolisgoodtorqueresponse,precisespeedcontrol,zerospeedcanachievefullload.However,thevectorcontrolsystemneedstodeterminetherotorflux,tocoordinatetransformation,alargeamountofcalculation,butalsoconsidertheeffectofchangesintherotorofthemotorparameters,whichmakesthesystemmorecomplex,thisisthevectorcontroldeficiencies.

1.2directtorquecontrol

Itisbasedonstatorfluxorientation,implementationofdirectcontrolofstatorfluxandtorque.Thecontrolisbasedontheideaofamplitudereal-timedetectionofmotortorqueandfluxaregiven,andthetorqueandfluxlinkagevaluecomparison,thetorqueandfluxadjustingtheappropriatestatorvoltagespacevectorselectiontableswitchcalculateddirectlyfromanoffline,powerswitchandcontrolofinverterstate.Directtorquecontroldoesnotneedthevectorcoordinatetransformationcomplex,themotormodelissimplified,nopulsewidthmodulationsignalgenerator,controlhastheadvantagesofsimplestructure,motorparameterchanges,canobtaingooddynamicperformance.Buttherearealsosomeshortcomings,suchastheinverterswitchingfrequencyisnotfixed,largetorqueripplecurrenttorealizedigitalcontrolrequireshighsamplingfrequency.

1.3directtorquecontrolbasedonspacevectormodulation（SVM-DTC）

TheSVM-DTCcontrolisthevectorcontrolanddirecttorquecontroltogether,itstheoryfoundationandDTCcontroltheory,isbasedontorqueanglecontrol.Accordingtothechangeoftorqueangleandfluxvectorposition,getthefluxofthenextcycleposition,whichcanbethereferencevoltagevectorisrequired,thenthereferencevoltagevectormodulation,PWMwaveinverterdriving.TheSVM-DTCcontrol,thefluxchangestodeterminethenextposition,sotheaccurateestimationoffluxhasgreateffectonthecontrolsystem,andthefluxestimationdependsonmotorparametersarestable.Inaddition,theelectromagnetictorqueandtorqueangleisanonlinearrelationship,butinthepracticalapplicationisapproximatelylinear,usingPIregulation,performancesothatthePIparameterscanalsoaffectthesystem.

1.4Themodelreferenceadaptivecontrol（MRAS）

Themodelsystemrequirementsofthecontrolsystemwithamodelfortheadaptivecontrol,theoutputresponsemodelisideal,thismodeliscalledthereferencemodel.Thesystemalwaystriestomakedynamicconsistencycanbedynamicreferencemodelandtheadjustablemodelinoperation.Bycomparingtheoutputofreferencemodelandactualprocess,andthroughtheadaptivecontrollertoadjustsomeparametersoftheadjustablemodelorgenerateanauxiliaryinput,sothattheoutputerrorbetweenactualoutputandthereferencemodelassmallaspossible.Inpracticalapplication,usuallyusedforspeedestimation,torealizethespeedsensorlessoperation.Therefore,themodelreferenceadaptivedependsmainlyontheaccuracyoftheadjustablemodel,thestableoperationofthesystemplaysadecisiverolein.Inaddition,theadaptivecontrollawparameterstuningisadifficultproblem,thecontrolaccuracyofthecontrolsystemhasagreatimpact.

1.5Thestateobserverbasedcontrol

Controlbasedonstateobserverisdevelopedbasedonthemoderncontroltheory,observerbasedonthemathematicalmodelofpermanentmagnetsynchronousmotor,usedforeachobservationcontrolsystemandthestate,thusextractingspeedcontrol.Itisalsodependentontheaccuracyofthemotormodel,theappearanceoflargeerrorwillrunatlowspeedorincreasingtemperatureleadstothevariationofmotorparameters,soastobringlargedeviationtocontrol.

1.6intelligentcontrol

Theuseofintelligentalgorithms,intelligentcontrolofthecontrolsystem,suchasfuzzycontrol,neuralnetworkcontrol,self-tuningparametersandsoon,throughoneorseveraltimesafterthetrialoperation,automaticparametertuningout,torealizetheoptimizationcontrol.Intelligentcontrolhasmanyadvantages,especiallyinthemotorismultivariable,nonlinearcontrolsystem,however,controlanditsperformancedependsonthecontrolobject,thatistosaynoteverycontrolsystemcanachievegoodcontrol,whichrequiresexperience.Atthesametime,thelargeamountofcomputation,butalsohascertainrequirementsforthecontroller.

SynchronousMotorbecauseofhavingpowerfactorhigherrun–timeefficiencyhigher,stabilitygood,therevolvingspeedsettlestowaitamerit,isextensivelybeenappliedtoindustrialproductionamid.Thestartingfaultthatacquaintswithsynchronousmotor,anddebuggingintime,allhaveimportantmeaningtothemotorandtheproductionsystems.Bywayofenergyintime,accuratedebuggingandtransactionfault,havethefamiliarfaultprogressofthesynchronousmotorindetailanalytical!

2Familiarfault

2.1Thesynchromotorafterswitchingonelectricitytheincapabilitystarts

Thesynchromotorafterstartingtheincapabilityrun-timegenerallyhasthereasonofseveralsasfollows:

（1）Powersupplyvoltageoverlow.Becauseatthesquareofvoltage,thestartingtorquedirectproportionofsynchromotor'sthevoltageofpowersupplyovermakelowthestartingtorqueofsynchromotorsignificantlythedroopislowerthanloadtroque,cannotstartthusandwanttoraisevsthispowersupplyvoltagetoenlargethestartingtorqueofdynamo.

（2）Thefaultofmotor.Checkmotorsettle,therotorwindinghadnoshortcircuit,opencirctui,opensolderingandlinkbadetc.fault,thesethefaultswillmakethedynamocannotstarttocreatestartingofratingofintensityofmagneticfield,makethusthedynamocannotstart;Checkingthemotorbearinghasalreadyhadnofailure,theportcaphashavenoloose,ifbearingfailureportshroudloose,resultinbearing'sdownsinking,mutuallyrubwithstatorironcore,resultinthusdynamo'scanningnotstart,vssettletherotorfaultcanbeshakentablewiththelowtension,graduallyclicktochecktoseekafaultconditionandadopthomologoustreatment;Thecountersgaftacceptsandcarriestoshroudalooseconditionandallwantsapancarbeforedrivingeachtimeandseesmotorrotorwhetherslewingisvivid,ifbearingorshaftkiowattdamageandreplaceintime.

（3）Thecontroldevicebreaksdown.Thiskindoffault