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外文翻译--异步电动机软启动与转矩控制.doc

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外文翻译--异步电动机软启动与转矩控制.doc

西安文理学院本科毕业设计(论文)第1页SOFTSTARTINGOFINDUCTIONMOTORWITHTORQUECONTROLADEMIRNIED,MEMBER,IEEE,JOSDEOLIVEIRA,RAFAELDEFARIASCAMPOS,ROGRIOPINHODIAS,ANDLUIZCARLOSDESOUZAMARQUESABSTRACTTHISPAPERPRESENTSASIMPLETECHNIQUEBASEDONSTATORFLUXESTIMATIONTOCONTROLTHEELECTROMAGNETICTORQUEOFINDUCTIONMOTORSIMSDURINGSOFTSTARTINGTHEINHERENTPROBLEMSRELATEDTOPUREINTEGRATIONOFTHEBACKELECTROMAGNETICFORCETOESTIMATETHESTATORFLUXAREMINIMIZEDUSINGTHELOWPASSFLLTERAPPROACHTHEEXPERIMENTALRESULTSAREDEALTWITHANDCOMPAREDWITHTHEUSUALCURRENTCONTROLTECHNIQUETHERESULTSOBTAINEDVALIDATETHEPROPOSEDTECHNIQUE,SHOWINGITSVIABILITYINAPPLICATIONSWHERETHEOBJECTIVEISTOFITTHEIMTORQUEPROFILEDURINGSTARTINGORSTOPPINGACCORDINGTOTHELOADTORQUEINDEXTERMSINDUCTIONMOTORIM,SOFTSTARTER,TORQUECONTROLIINTRODUCTIONTHEACMOTORSTARTERSEMPLOYINGPOWERSEMICONDUCTORSAREBEINGINCREASINGLYUSEDTOREPLACEELECTROMAGNETICLINESTARTERSANDCONVENTIONALREDUCEDVOLTAGESTARTERSBECAUSEOFTHEIRCONTROLLEDSOFTSTARTINGCAPABILITYWITHLIMITEDSTARTINGCURRENT1THYRISTORBASEDSOFTSTARTERSARECHEAP,SIMPLE,RELIABLE,ANDOCCUPYLESSVOLUME,ANDTHEREFORE,THEIRUSEISAVIABLESOLUTIONTOTHEINDUCTIONMOTORIMSTARTINGPROBLEM2THEANGLERAMPTECHNIQUEISKNOWNASTHEVOLTAGERAMPTECHNIQUEBECAUSEITDOESNOTHAVEAVOLTAGEFEEDBACKAPPLIEDTOTHEMOTORITMEANSTHATTHEIMVOLTAGEISCONTROLLEDTHROUGHAFIRINGANGLERAMPOFTHETHYRISTORSINANOPENLOOPTHISTECHNIQUEISSIMPLE,ANDITISUSEDINLOWCOSTCOMMERCIALSOFTSTARTERSITWILLALWAYSPRODUCEASTARTINGQUADRATICTORQUECURVETHATCANBEAPPLIEDTOSMALLHYDRAULICPUMPSANDSMALLFANSDEPENDINGONTHEINITIALSWITCHINGINSTANTSOFALLTHETHREEPHASESTOTHESUPPLY,ANIMMAYPRODUCESEVEREPULSATIONSONTHEELECTROMECHANICALTORQUE,REGARDLESSOFWHETHERITISCONTROLLEDBYADIRECTONLINESTARTERORASOFTSTARTER3THEELECTROMAGNETICTORQUEPULSATIONSMAYCAUSESHOCKSTOTHEDRIVENEQUIPMENTANDDAMAGETOMECHANICALSYSTEMCOMPONENTS,SUCHASSHAFTS,COUPLINGS,ANDGEARS,IMMEDIATELYPAPER2009IDC024R3,PRESENTEDATTHEINDUSTRYAPPLICATIONSSOCIETYANNUALMEETING,EDMONTON,AB,CANADA,OCTOBER5–9,ANDAPPROVEDFORPUBLICATIONINTHEIEEETRANSACTIONSONINDUSTRYAPPLICATIONSBYTHEINDUSTRIALDRIVESCOMMITTEEOFTHEIEEEINDUSTRYAPPLICATIONSSOCIETYMANUSCRIPTSUBMITTEDFORREVIEWJANUARY31,2009ANDRELEASEDFORPUBLICATIONOCTOBER30,2009FIRSTPUBLISHEDMARCH25,2010;CURRENTVERSIONPUBLISHEDMAY19,2010THISWORKWASSUPPORTEDBYWEGEQUIPAMENTOSELTRICOSANIED,JDEOLIVEIRA,ANDRDEFARIASCAMPOSAREWITHTHEDEPARTMENTOFELECTRICALENGINEERING,UNIVERSIDADEDOESTADODESANTACATARINA,JOINVILLE89223100,BRAZILEMAIL西安文理学院本科毕业设计(论文)第2页DEE2ANJOINVILLEUDESCBR;DEE2JOJOINVILLEUDESCBR;CAMPOSRAFATERRACOMBRRPDIASISWITHWEGEQUIPAMENTOSELTRICOS,JARAGUDOSUL3000,BRAZILEMAILROGERIOPDWEGNETLCDESOUZAMARQUESISWITHTHEPOWERELECTRONICSANDCONTROLRESEARCHGROUP,UNIVERSIDADEFEDERALDESANTAMARIA,SANTAMARIA97105900,BRAZILEMAILMARQUES_LCSMHOTMAILCOMDIGITALOBJECTIDENTIFIER101109/TIA20102045335IFTHESTRENGTHOFMATERIALSISEXCEEDED,ORINTHELONGTERM,OWINGTOFATIGUE2NUMEROUSATTEMPTSHAVEBEENMADEONTHEPERFORMANCEANALYSISANDCONTROLTECHNIQUESOFATHREEPHASEIMFEDFROMATHYRISTORIZEDVOLTAGECONTROLLER4–9IN8,ADYNAMICFUNCTIONWASUSEDFORTHETHYRISTORTRIGGERINGANGLEINTHEVOLTAGECONTROLLERPROVINGTOBEASIMPLEANDEFFECTIVEWAYTOIMPROVETRANSIENTPERFORMANCETHERATEATWHICHTHEMAINFIUXBUILDSUPISDECREASED,ANDTHETRANSIENTTORQUEISSMOOTHEDBYEMPLOYINGAPROPERTRIGGERINGFUNCTIONIN1,SOMECONTROLSTRATEGIESAREPROPOSEDTOELIMINATEELECTROMAGNETICTORQUEPULSATIONS,BOTHATSTARTINGANDRECLOSING,ANDTOKEEPTHELINECURRENTNEARLYCONSTANTATAPRESETVALUEOVERTHEENTIRESTARTINGPERIODTHEPROPOSEDCURRENTCONTROLSTRATEGYISCOMPOSEDOFSUCCESSIVECOSINESANDCONSTANTFUNCTIONSEGMENTSOFTHYRISTORTRIGGERINGANGLEIN2,THEPERFORMANCEOFTHEIMDURINGVOLTAGECONTROLLEDSOFTSTARTINGHASBEENOPTIMIZEDBYELIMINATINGTHESUPPLYFREQUENCYTORQUEPULSATIONSUSINGAPULSATINGTORQUEELIMINATIONSTRATEGYAPPLIEDIN10AND11,BYEXTENDINGITTOCOVERALLOFTHEOPERATINGCONDITIONSOFASOFTSTARTER,ANDBYKEEPINGTHELINECURRENTCONSTANTATTHEPRESETVALUEOVERTHEENTIRESOFTSTARTINGPERIODTHUS,IN1AND2,THETECHNIQUEUSEDTOSTARTTHEIMWITHSOFTSTARTERISBASEDONTHECLOSELOOPCONTROLWITHCURRENTLIMITATIONTHISCURRENTCONTROLTECHNIQUECANPROVIDEACONSTANTTORQUEDURINGTHEBEGINNINGANDINTHEMIDDLEOFTHESTARTINGPROCESSHOWEVER,DURINGTHEFINALPERIODOFTHISPROCESS,ONECANVERIFYTHEEXISTENCEOFATORQUEPULSE,INWHICH,FORCERTAINKINDSOFLOADS,ANABRUPTACCELERATIONCANBEGENERATEDTHEREFORE,ITSEEMSTHATAGOODSOLUTIONTOSOLVETHISPROBLEMISTODIRECTLYCONTROLTHEELECTROMAGNETICTORQUEDURINGTHESTARTINGPROCESSINTHISPAPER,ATORQUECONTROLTECHNIQUEISPROPOSEDTOELIMINATETHEELECTROMAGNETICTORQUEPULSATIONSANDTOKEEPTHELINECURRENTNEARLYCONSTANTATAPRESETVALUEOVERTHEENTIRESOFTSTARTINGPERIODTHISSTRATEGYALLOWSTHETORQUETOBECONTROLLEDINSUCHAMANNERTHATACONSTANTTORQUEOREVENATAILOREDTORQUECANBEFOLLOWEDBYTHEIMDURINGSTARTINGORSTOPPINGPROCESSTHEPROPOSEDTECHNIQUE,BESIDESMAKINGTHEBENEFITSOBTAINEDFROMTHECURRENTCONTROLTECHNIQUEPREVIOUSLYCITEDPOSSIBLE,ALSOALLOWSCANCELINGTHETORQUEPULSEANDTHEACCELERATIONVERIFIEDATTHEENDOFTHEIMSTARTINGTHECONTROL,PROTECTION,ANDMONITORINGFUNCTIONSOFTHEPROPOSEDTECHNIQUEAREIMPLEMENTEDINAMICROCONTROLLERTHEORETICALRESULTSAREVERIFLEDEXPERIMENTALLYUSINGACUSTOMDESIGNEDEXPERIMENTAL西安文理学院本科毕业设计(论文)第3页SETUPTHISPAPERISORGANIZEDASFOLLOWSSECTIONIIDESCRIBESTHEPROPOSEDTORQUECONTROLTECHNIQUEANDOPERATIONPRINCIPLES;NIEDETALSOFTSTARTINGOFINDUCTIONMOTORWITHTORQUECONTROLFIG1PROPOSEDCONTROLTECHNIQUESCHEMATICDIAGRAMFIG2PROPOSEDCONTROLTECHNIQUEDETAILEDDIAGRAMSECTIONIIISHOWSTHEAPPROACHUSEDTOESTIMATETHEFLUXFROMWHICHTHEELECTROMAGNETICTORQUEWILLBEOBTAINED;SECTIONIVPRESENTSEXPERIMENTALRESULTSOFTHEPROPOSEDTECHNIQUE,ANDFINALLY,CONCLUSIONSAREGIVENINSECTIONVIISYSTEMDESCRIPTIONANDOPERATIONPRINCIPLESTHESCHEMATICDIAGRAMOFTHEIMSOFTSTARTERWITHTHEPROPOSEDTORQUECONTROLTECHNIQUEISGIVENINFIG1THEELECTROMAGNETICTORQUEESTIMATIONISOBTAINEDUSINGALOWPASSFILTERLPFASTHESTATORFLUXESTIMATORWHICHELIMINATESTHEANALOGINPUTOFFSETTHECLOSEDLOOPTORQUECONTROLALLOWSTHE西安文理学院本科毕业设计(论文)第4页PRODUCTIONOFTHEDESIREDSTARTTORQUEPROFILEFROMTHEADOPTEDREFERENCETORQUETREF,ADJUSTINGTHEELECTROMAGNETICTORQUETEMTOTHELOADTORQUEFIG2SHOWSADETAILEDDIAGRAMOFTHEIMSOFTSTARTERWITHTHEPROPOSEDTORQUECONTROLTECHNIQUETHISDIAGRAMISCOMPOSEDOFTHREEPAIRSOFBACKTOBACKCONNECTEDTHYRISTORS,AMICROCONTROLLERBASEDCONTROLANDPROTECTIONCIRCUITRY,fiRINGANDANALOGINTERFACECIRCUITS,SYNCHRONISM,ANDHUMAN–MACHINEINTERFACETHEANALOGINTERFACECIRCUITRECEIVESTHETHREELINETOLINEINPUTVOLTAGESIGNALSVRS,VST,ANDVTR,THETHREELINETOLINEOUTPUTVOLTAGESIGNALSVAB,VBC,ANDVCAVIADIFFERENTIALAMPLIfiERSWITHRESISTIVEDECADES,ANDTHETHREELINECURRENTSIGNALSIA,IB,ANDICVIACURRENTTRANSFORMERSTHEGENERATIONOFTHYRISTORFIRINGPULSESISOBTAINEDBYUSINGTHREESIGNALSTHETORQUEREFERENCESIGNAL,THEESTIMATEDTORQUESIGNAL,ANDTHEINPUTVOLTAGESYNCHRONISMSIGNALSTABLEIDEFINITIONOFOPERATIONMODESFIG3FIRINGSEQUENCEATTHEBEGINNINGOFSTARTINGPROCESS

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