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Averyfastdirecttorquecontrolforinteriorpermanentmagnetsynchronousmotorsstartup OriginalResearchArticleEnergyConversionandManagementSelectionofthestatorfluxcommandindirecttorquecontrolDTCofpermanentmagnetsynchronousmotorsisveryimportantasitaffectsmachineperformance.Forsteadystateoperationitcanhelptodecreasethestatorcurrentormachinelosses.Howeverinordertogetafasttorqueresponseduringmotorstartuponeneedstochangeboththestatorfluxangleandmagnitude.Inthispaperamethodispresentedtofindtheoptimalvoltagevectorstochangeboththefluxangleanditsmagnitudethatresultsinhighspeeddynamicsforthetorqueresponse.Theclosedformformulagivenfortheoptimalvoltagevectorisderivedbasedonmaximizingthetorquechangeineachsamplingtime.ThesimulationresultsshowthatthepresentedmethodissuperiortotheconventionalDTC.InotherwordsitisshownthatthevoltagevectorsderivedfromtheswitchingtableforconventionalDTCarenottheoptimalvoltagevectorsforthesituationinwhichthereisastepchangeinthetorquecommand.ArticleOutline
1.Introduction
2.IPMmachinemodelandDTCfundamentals
3.Fluxcommandeffectonmachineperformance
4.Optimalvoltagevector
4.
1.Optimalvoltagevectorselection
4.
2.SVMtoapplyoptimumvoltagevectortomachine
5.Systemperformance
5.
1.Systemblockdiagram
5.
2.Simulationresults
6.ConclusionsAcknowledgementsAppendixA.MotordataReferencesAhybridcontrollerforthespeedcontrolofapermanentmagnetsynchronousmotordrive OriginalResearchArticleControlEngineeringPracticeThispaperintroducesahybridcontrollerHCwhichconsistsofaparallelconnectedslidingmodecontrollerSMCandaneuro-fuzzycontrollerNFCforthespeedcontrolofapermanentmagnetsynchronousmotorPMSMdrive.TheaimofthisstudyistoobtainacontrollerthateliminatesthechatteringphenomenonandprovidesafastandsmoothdynamicresponseforthespeedcontrolofaPMSMdrive.ThereforeusinganerrorbandmethodthesystemiscontrolledbytheSMCtogetafastdynamicresponseintransientmodeandisalsocontrolledbytheNFCtogetasmoothdynamicresponseinsteadystatemode.ToillustratetheperformanceoftheproposedcontrollerthesimulationandexperimentalstudiesarepresentedseparatelyfortheSMCNFCandHC.Theresultsarecomparedwitheachotheranddiscussedindetail.ArticleOutline
1.Introduction
2.ModelingofthePMSMdrivesystem
2.
1.Motorandinverter
2.
2.HysteresisbandPWM
2.
3.Torque
3.DesignofthehybridcontrollerHC
3.
1.Designoftheslidingmodecontroller
3.
2.DesignoftheNFC
3.
2.
1.Feedforwardalgorithm
3.
2.
2.Backpropagationlearningalgorithm
4.Simulationandexperimentalresults
5.ConclusionsReferencesNonlinearpredictivecontrollerforapermanentmagnetsynchronousmotordrive OriginalResearchArticleMathematicsandComputersinSimulationAnonlinearpredictivecontrollerNPCforapermanentmagnetsynchronousmotorPMSMisproposedinthispaper.Itsobjectiveishighperformancetrackingoftherotorspeedtrajectorywhilemaintainingthed-axiscomponentofthearmaturecurrentatzero.Theloadtorqueandthemismatchedparametersareconsideredtobeunknownperturbations.Toensurerobustnessagainsttheseperturbationsadisturbanceobserverisdesignedusinganewgainfunctionandintegratedintothecontrollaw.Thecombinationofthenonlinearpredictivecontrollerandthedisturbanceobserverworksasanonlinearcontroller.Theoverallclosed-loopsystemisprovedtobegloballyasymptoticallystabledependingonthedesignparameters.Thevalidityoftheproposedcontrollerwastestedbysimulations.Satisfactoryresultswereobtainedwithrespecttothetrackingofthespeedtrajectoryanddisturbancerejection.ArticleOutline
1.Introduction
2.MathematicalmodelofthePMSM
3.NonlinearpredictivecontrolofaPMSM
3.
1.FormulationoftheNPCproblem
3.
2.Theinputrelativedegree
3.
2.
1.Theinputrelativedegreeoftheoutputy
13.
2.
2.Theinputrelativedegreeoftheoutputy
23.
2.
3.TheinputrelativedegreeofthePMSMoutputs
4.Disturbanceobserver
5.Stabilityoftheclosedloopsystemundertheloadtorqueobserver
6.BlockdiagramoftheproposedNPCforaPMSM
7.Simulationresults
7.
1.Scenario
17.
2.Scenario
28.ConclusionAcknowledgementsReferencesTorqueripplereductioninexterior-rotorpermanentmagnetsynchronousmotor OriginalResearchArticleJournalofMagnetismandMagneticMaterialsThepaperpresentstorqueripplereductioninpermanentmagnetsynchronousmotorwithexterior-rotor.Theinfluenceofthemagnetpolearcwidthandtheinfluenceofthesupplycurrentwaveformonthetorquerippleareconsideredintheanalysis.Theresultsoftheanalysisareobtainedbythefiniteelementmethodsimulationandareverifiedexperimentallyaswell.Thereductionoftotaltorquerippleatnominalloadconditionslessthan2%isachievedbypropermotormagnetpolearcdesignandbyapplyingtheoptimalstatorcurrentwaveformcontrol.ArticleOutline
1.Introduction
2.Methodofanalysis
3.Results
4.ConclusionReferencesEffectofmagneticpropertiesofnon-orientedelectricalsteelontorquecharacteristicsofinterior-permanent-magnetsynchronousmotor OriginalResearchArticleJournalofMagnetismandMagneticMaterialsThetorquecharacteristicsofinterior-permanent-magnetsynchronousmotorIPMSMinwhichcorematerialswereourconventionalnon-orientedelectricalsteel35SX250andourdevelopedsteels35SXH27SXHwithhighpermeabilityweremeasuredbyapulsewavemodulationPWMinvertercontrol.Thetorquecharacteristicsofthemotorwithdevelopedsteelsweresuperiortothatofconventionalsteel.Theadvantageofdevelopedsteelswasremarkableinthehigh-toqueregion.Experimentaltorqueseparationusingcurrentphasecontrolshowedthatreluctancetorquewasstronglyaffectedbythemagneticpropertiesofcorematerials.AndwedidmagneticfieldanalysisofthemotorsbyfiniteelementmethodFEM.Thefluxdensityintheteethofthestatorcorewashigherinthehighpermeabilitysteelsthanthatintheconventionalsteelunderthesamecurrentcondition.ThedevelopedsteelsareexpectedtobesuitedtothestatormaterialofIPMSMusedasdrivemotorsforelectricvehiclesandcompressormotorsforairconditioner.ArticleOutline
1.Introduction
2.Experimental
2.
1.Modelmotor
2.
2.Measuringmethod
3.Resultanddiscussion
4.ConclusionReferences机械/设备/重工 家具/家电/工艺品/玩具/珠宝外资欧美人力资源部产品工程部诚聘语言要求英语 良好学 历硕士工作年限应届毕业生发布日期2010-12-14工作地点南京招聘人数若干Simulationstudiesonmodelreferenceadaptivecontrollerbasedspeedestimationtechniqueforthevectorcontrolledpermanentmagnetsynchronousmotordrive OriginalResearchArticleSimulationModellingPracticeandTheoryThispaperpresentsaspeedestimationtechniqueforthepermanentmagnetsynchronousmotordrive.AModelReferenceAdaptiveSystemMRAShasbeenformedusingtheinstantaneousandsteady-statereactivepowerstoestimatethespeed.IthasbeenshownthatsuchuniqueMRASoffersseveraldesirablefeatures.Theproposedtechniqueiscompletelyindependentofstatorresistanceandislessparametersensitiveastheestimation-algorithmisonlydependentonq-axisstatorinductance.AlsothemethodrequireslesscomputationaleffortasthesimplifiedexpressionsareusedintheMRAS.ThestabilityoftheproposedsystemisachievedthroughPopov’sHyperstabilitycriteria.Extensivesimulationresultsarepresentedtovalidatetheproposedtechnique.Thesystemistestedatdifferentspeedsincludingzerospeedandaverysatisfactoryperformancehasbeenachieved.ArticleOutline
1.Introduction
1.
1.Back-emfbasedmethod
[5]and
[6]
1.
2.Signalinjectionbasedmethod
[7]
1.
3.Stateobserver-basedmethod
[8]and
[9]
1.
4.ModelreferenceadaptivesystemMRASbasedtechniques
[10]
[11]
[12]
[13]and
[14]
1.
5.Othermethods
[15]and
[16]
2.MRAS-basedspeedestimation
2.
1.MRASdesign:hyperstabilityandpositivityconcepts
3.Proposedscheme
3.
1.StructureoftheproposedMRAS
3.
2.Theoreticaldevelopmentoftheproposedcontroller
3.
2.
1.ModellingofPMSM
3.
2.
2.Expressionofreactivepower
3.
2.
3.Adaptationmechanism
4.Simulations
4.
1.Speedreversalfrom100 rad/secto−100 rad/sec
4.
2.Responseofthedriveforramptypespeedreference
4.
3.Slowandzerospeedperformanceofthedrive
5.ConclusionReferencesPole-shapeoptimizationofpermanent-magnetlinearsynchronousmotorforreductionofthrustripple OriginalResearchArticleEnergyConversionandManagementInthispaperwehaveusedmagnetarcshapingtechniqueinordertoimprovetheperformanceofpermanent-magnetlinearsynchronousmotorPMLSM.AtfirstadetailedanalyticalmodelingbasedonMaxwellequationsispresentedfortheanalysisanddesignofPMLSMwiththearc-shapedmagneticpolesASMPs.Thentheaccuracyofpresentedmethodisverifiedbyfinite-elementmethod.Verycloseagreementbetweentheanalyticalandfinite-elementresultsshowstheeffectivenessoftheproposedmethod.Finallyamagnetshapedesigniscarriedoutbasedontheanalyticalmethodtoenhancethemotordevelopedthrust.Pertinentevaluationsontheoptimaldesignperformancedemonstratethatshapeoptimizationleadstoadesignwithextralowthrustripple.ArticleOutlineNomenclature
1.Introduction
2.Analysismodel
2.
1.Motortopology
2.
2.FielddistributionduetoPMsource
2.
3.EMFcalculation
2.
4.Thrustprediction
2.
5.Comparisonwithfinite-elementmethod
3.Optimaldesign
4.Designevaluation
5.ConclusionReferencesApplicationofneuralnetworksforpermanentmagnetsynchronousmotordirecttorquecontrol OriginalResearchArticleJournalofSystemsEngineeringandElectronicsNeuralnetworksrequirealotoftrainingtounderstandthemodelofaplantoraprocess.Issuessuchaslearningspeedstabilityandweightconvergenceremainasareasofresearchandcomparisonofmanytrainingalgorithms.TheapplicationofneuralnetworkstocontrolinteriorpermanentmagnetsynchronousmotorusingdirecttorquecontrolDTCisdiscussed.AneuralnetworkisusedtoemulatethestateselectoroftheDTC.Theneuralnetworksusedaretheback-propagationandradialbasisfunction.Toreducethetrainingpatternsandincreasetheexecutionspeedofthetrainingprocesstheinputsofswitchingtableareconvertedtodigitalsignalsi.e.onebitrepresentthefluxerroronebitthetorqueerrorandthreebitstheregionofstatorflux.Computersimulationsofthemotorandneural-networksystemusingthetwoapproachesarepresentedandcompared.Discussionsabouttheback-propagationandradialbasisfunctionasthemostpromisingtrainingtechniquesarepresentedgivingitsadvantagesanddisadvantages.Thesystemusingback-propagationandradialbasisfunctionnetworkscontrollerhasquickparallelspeedandhightorqueresponse.职位描述
1、负责全球工程中心热泵热水器产品的开发工作;
2、负责全球工程中心热泵热水器产品样机制作及测试跟踪;
3、负责全球工程中心热泵热水器产品维护;
4、与美国方面或南京商用事业部进行技术沟通岗位要求
1、空调、制冷或暖通专业研究生学历
2、熟练使用各种办公软件及AutoCAD、Solidworks等工程绘图软件;
3、良好的沟通表达能力和团队合作意识;
4、能熟练运用英语进行阅读和交流;
5、能适应加班和出差工作应聘资料投递完整的应聘资料包括简历、专题报告、毕业生就业推荐表、成绩单为方便匹配您的应聘资料,请按以下要求提交提交方式发送电子邮件至aoshiring@.com.cn邮件主题格式应聘职位-学校-专业-姓名(例如客服工程师-东南大学-热能工程-张昊)简历文件名简历-应聘职位-学校-专业-姓名-应聘日期.doc例如简历-管理培训生-人力资源管理方向-南师大-心理学-李明-
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101012.doc我们将有专人处理您的邮件,并通知您下一步安排关于专题报告专题报告是额外展示您能力的机会,我们通过专题报告来考察您钻研与思考、实践与发现、学习与创新等方面的能力水平,是公司判断是否录用您的重要依据,请认真准备专题报告的题材和字数不限,主题应与A.O.史密斯公司和您应聘的方向有关(例如应聘产品设计工程师的,建议以A.O.史密斯公司的产品技术为主题;应聘管理培训生-生产管理方向的,建议以A.O.史密斯公司的生产制造为主题)****特别提醒不提交专题报告及专题报告全盘引用资料的同学将不能获得面试的机会更多关于2011年大学生招聘和我们公司,请访问公司网站www.com.cnRobustadaptivedynamicsurfacecontrolofchaosinpermanentmagnetsynchronousmotor PhysicsLettersAWithsystemparametersfallingintoacertainareathepermanentmagnetsynchronousmotorPMSMisexperiencingchaoticbehaviorwhichthreatensthesecureandstableoperationofdrivesystem.TocontroltheundesirablechaosinPMSManadaptivedynamicsurfacecontrolDSClawisfirstdesignedwhichovercomestheproblemof“explosionofterms”associatedwiththetraditionalbacksteppingdesignprocedurebyintroducingfirst-orderlow-passfilters.AndthenbasedonLyapunovasymptoticalstabilitytheorystabilityoftheclosed-loopcontrolledsystemisanalyzed.Simulationresultsshowthatthepresentedcontrollawisveryeffectiveandrobustagainsttheuncertaintiesinsystemparameters.TheresearchofthisLettermayhelptomaintaintheindustrialdrivesystemssecurityoperation.ArticleOutline
1.Introduction
2.Chaosinthepermanentmagnetsynchronousmotor
3.RobustadaptivedynamicsurfacecontrolofchaosinPMSM
3.
1.Controllerdesign
3.
2.Stabilityanalysis
4.Numericalsimulationandanalysis
5.ConclusionAcknowledgementsAppendixA.ControllingchaosinPMSMbasedonconventionalbacksteppingtechniqueReferencesSensorlesscontrolofsurfacepermanentmagnetsynchronousmotorusinganewmethod OriginalResearchArticleEnergyConversionandManagementInthispaperanewapproachtosensorlessspeedcontrolandinitialrotorpositionestimationforasurfacepermanentmagnetsynchronousmotorSPMSMdriveispresented.AtarotatingconditionthespeedandrotorpositionestimationoftheSPMSMdriveisobtainedthroughaselfadaptivefluxobserverSAObyonlymeasuringphasevoltagesandcurrents.Theinitialrotorpositionisestimatedbyusingthenonlinearmagnetizationcharacteristicsofthestatorcorewhichiscausedbytherotormagnets.Experimentalresultsshowthatinbothsteadyandtransientstatesthesystemcanachievealltheexpectedperformances.ArticleOutline
1.Introduction
2.MathematicalmodelofSPMSM
3.Structureofselfadaptiveobserver
4.Estimationmethodofrotorinitialposition
5.Experimentalresults
6.ConclusionAcknowledgementsReferencesMagneticFieldAnalysisofDiskCorelessPermanentMagnetSynchronousMotorBasedonThicknessVariationHalbachArray OriginalResearchArticleJournalofIronandSteelResearchInternationalBeinganewpermanentmagnetsPMsarrangementtheHalbacharraycouldapprovethemagneticfluxdensityeffectivelythroughweakeningthemagneticfluxdensityinonesideofthePMsarraymeanwhilestrengtheningthemagneticfluxdensityintheotherside.InthediskcorelessPMsynchronousmotorPMSMthemagneticfluxdensityisrequiredtobesinewaveandthepeakvalueshouldbeashighaspossible.Thepaperdealswiththeapplicationofthe90°HalbacharrayinthediskcorelessPMSMadoptingNdFeBPMs.ForthethicknessofPMsinfluencesthemagneticfluxdensityintheairgapthethicknessvariationtechnologyisadopted.ThroughalteringtheadjacentPMsthicknessninedifferentPMsthicknesscombinationisanalyzedbyFEMmethods.AndtheconclusionisthatwhenthethicknessoftangentialmagnetizationPMsisgreatthanthatoftheradialmagnetizationPMsthemagneticfluxdensitywaveisclosertosinewavethanwhenthethicknessofthetangentialmagnetizationPMsissmallerthanthatoftheradialmagnetizationPMs.FurthermorewhenthethicknessofthetangentialmagnetizationPMsisgreatthanthatoftheradialmagnetizationPMskeepingthethicknessofthetangentialmagnetizationPMsbeing
0.006mandthethicknessoftheradialmagnetizationPMsvariationfrom
0.0048mto
0.006mthemagneticfluxdensityintheairgapwillbecomeclosertosinewavegraduallyandthenitbecomesnonsinusoidalagain.AndwhenthethicknessofradialmagnetizationPMsis
0.0054mand
0.0055mthewavesofmagneticfluxdensityintheairgaparebetterthanothers.Magneticallynonlineardynamicmodelofsynchronousmotorwithpermanentmagnets OriginalResearchArticleJournalofMagnetismandMagneticMaterialsThispaperdealswithamagneticallynonlineartwo-axisdynamicmodelofapermanentmagnetsynchronousmotorPMSM.Thegeometricalandmaterialpropertiesofironcoreandpermanentmagnetstheeffectsofwindingdistributionsaturationcross-saturationandslottingeffectsareforthefirsttimesimultaneouslyaccountedforinasingletwo-axisdynamicmodelofathree-phasePMSM.Theyareaccountedforbycurrent-andposition-dependentcharacteristicsoffluxlinkages.ThesecharacteristicscanbedeterminedeitherexperimentallyorbythefiniteelementFEcomputations.TheresultsobtainedbytheproposeddynamicmodelshowaverygoodagreementwiththemeasuredonesandthoseobtainedbytheFEcomputation.ArticleOutline
1.Introduction
2.Two-axisdynamicmodel
3.Determiningcharacteristicsoffluxlinkages
4.Results
5.ConclusionReferencesFourierseriesexpansionforsynchronizationofpermanentmagnetelectricmotors OriginalResearchArticleAppliedMathematicsandComputationLearningcontroltechniquesbasedonFourierapproximationtheoryareusedtosolvethetrackingcontrolproblemviastaterotorpositionandspeedandstatorcurrentsfeedbackforpermanentmagnetsynchronousmotorsperformingrepetitivetasks:smoothrotorpositionandspeedreferencesignalswhoseforeknowledgeisnotassumedandwhichareperiodicofuncertainperiodarerequiredtobetrackedforanymotorinitialcondition.Theeffectivenessoftheproposedsolutionisillustratedbyitssuccessfullyapplicationtoamaster–slavesynchronizationproblem.Thepresentedresultillustratesthehighpotentialityofmergingtogetherfunctionalapproximationtheoryandadvancednonlinearcontroltechniques.ArticleOutline
1.Introduction
2.Systemdynamicmodelandproblemstatement
3.Robustadaptivelearningcontroldesign
3.
1.Preliminarycomputationsandfourierseriesexpansion
3.
2.IdentifierfortheuncertainperiodT
3.
3.Estimateforqtandprojectionalgorithms
3.
4.Robustadaptivebacksteppingdesignandoverallstabilityproof
4.Simulationresults
5.ConclusionsReferences13423articlesfoundfor:pub-date1999andtakLeadershipandimplementationorSuchasorinductionmotorsorsynchronousmotorsorpermanentmagnetmotororetc.orRelatedtoorthemotordesignanddevelopmentorGlobalResearchCenterorCloselyorAssistanceortheUnitedStatesorTECOorWestinghouseMotorCompanyorTWMCandFailureanalysisorimprovementorRequirementsorelectricalormechanicalorthermalengineeringorRelevantorprofessionalormastersoraboveorwithormotororgeneratorordesignorManufactureoranalysisorTechnicalorengineeringorbackgroundorSoundgeneratorormotororStructureorframeorbearingsorcoolingornoiseorvibrationorknowledgeorFamiliarwithorelectricmotorsorgeneratorsorindustryorstandardsorsuchasorIECorULoretc.andANSOFTorMAGNETorANSYSorFLUENTorGAMBITorCATIAorPROEorAUTOCADorHELIXorCommercialorsoftwareorindustryorFluentorEnglishAnalysisofaNovelFlux-WeakeningStructureofHigh-SpeedPermanent-MagnetMotorsBasedonSoft-MagneticFerrite OriginalResearchArticleJournalofIronandSteelResearchSoft-magneticferritehasadvantagesofhighinitialmagneticpermeabilityhighelectricresistivitylowlossandlowcostinthehigh-frequencyalternatingfield.Consideringthecharactersofsoft-magneticferritethispaperusesasoft-magneticferriteringasstatorcoreandpresentsanovelfield-weakeningstructureofhighspeedPMmotors.Basedonthisstructureanovelfield-weakeningmethodofPMmotorscanbepresented.Theequivalentreluctanceofpermanentmagneticfieldcircuitcanbechangedbyalteringsaturationdegreeofsoft-magneticferritecoreinthismethod.Fortheconvenienceofanalysisandcalculationconsideringthemagneticfielddistributioninthemotorsthispaperdeducesanequivalenttwo-dimensionalfiniteelementmodelofthree-dimensionalmagneticfieldbywhichthefield-weakeningparametersofhighspeedPMmotorcanbeconvenientlyanalyzed.Thesimulationresultsoffiniteelementmodelprove:thefield-weakeningstructureofhighspeedPMmotorbasedonsoft-magneticferritepresentedinthispaperisvalidandfeasibleoffersavalidandapplicativemethodforfield-weakeningcontrolofhighspeedPMmotor.MagnetizationAnalysisforPole-ChangingPermanentMagnetMotor OriginalResearchArticleJournalofIronandSteelResearchInternationalVladoOstovicfirstproposedpole-changingpermanentmagnetmotor.Inhispaperthestatorwasthesamewiththatofpole-changinginductionmotortherotorwasbuiltfollowingthesandwichprincipleandsomeofthestatorwindingareusedasthemagnetizingcoil.Buttherotorstructurehasmanyshortcomings.Thesurface-mountedrotorisadvisedinthispaper.Themagnetizingmagneticfieldbysomeofthestatorwindingsiscalculatedandwefindthemagneticfieldiscomplex.Thedirectionoftheremanenceofthepermanentmagnetisdecidedbyboththeradialandtangentialcomponentofmagneticfield.WealsocalculatethemagnetizingprocessofpermanentmagnetbyFEMsoftware.Mixed-methodsdesignforanobjective-basedevaluationofamagnetschoolassistanceproject OriginalResearchArticleEvaluationandProgramPlanningThisarticledescribesanddiscussesthedevelopmentandimplementationofanevaluationdesigntoassessamagnetassistanceprojectwhichintegratesamixed-methodsapproachintotheobjective-basedevaluation.Bycombiningbothquantitativeandqualitativemethodsthisdesigncanaddresssomeoftheweaknessesofobjective-basedapproachintheprocessofevaluation.Functionsofmixed-methodsapproachsuchasinitiationtriangulationcomplementarityanddevelopmentcanpossiblycontributetoimprovingprogramprogressavoidinginformationnarrownessanduncoveringsideeffects.Theexaminationofthisdesignalsorevealsthatthemixed-methodsapproachisnotonlypossiblebutmoreeffectiveandhashighervalidity.Themixed-methodsisamoreusefulandaccountableapproachwhichcanbeusedinintegrationwiththetraditionalobjective-basedapproachtoconceiveandimplementevaluationespeciallyinprogramevaluationswithbroaderaudienceslongertermsandmorecomplexgoals.ArticleOutline
1.Introduction
2.Theoreticalreviewofthetwoevaluationapproaches
2.
1.Objective-basedapproach
2.
2.Mixed-methodsapproach
3.Contextanddescriptionofprogram
4.Methodologyforevaluatingtheobjectives
4.
1.ObjectiveI
4.
2.ObjectiveII
4.
2.
1.Observationandinterview
4.
2.
2.Professionaldevelopmentevaluation
4.
2.
3.Surveyandfocusgroupinterview
4.
3.ObjectiveIII
4.
4.ObjectiveIV
5.Discussions
5.
1.Improvingtheprojectsprogress
5.
2.Avoidinginformationnarrowness
5.
3.Uncoveringsideeffects
6.Lessonslearned
7.ConcludingcommentsAppendix.AppendixReferencesComparisonoftorquecapabilityofthree-phasepermanentmagnetsynchronousmotorswithdifferentpermanentmagnetarrangement OriginalResearchArticleJournalofMagnetismandMagneticMaterialsThepaperpresentsacomparisonoftorquecapabilityofthree-phasepermanentmagnetsynchronousmotorswithdifferentpermanentmagnetarrangement.Motorswiththefollowingpermanentmagnettopologieswereaccountedforinthecomparison:thesurface-mountedpermanentmagnetsynchronousmotorSMPMSMtheinteriorpermanentmagnetsynchronousmotorIPMSMthepermanentmagnet-assistedsynchronousreluctancemotorPMASRMandthefluxreversalpermanentmagnetmotorFRPMM.Finiteelementmethodanalysisisemployedtodeterminetheperformanceofeachmotor.Calculatedperformanceoffour-poleIPMSMdeterminedbyfiniteelementmethodcalculationisconfirmedwiththemeasurementsatnearlyconstantnominaloutputpowerintherangeofspeed3000–10000 rpm.ArticleOutline
1.Introduction
2.MethodofanalysisandresultsReferencesApermanentmagnetsphericalrotordesignandthreedimensionalstaticmagneticanalysis OriginalResearchArticleSensorsandActuatorsA:PhysicalInthisworktobeusedinsphericalmotorafourpolesphericalrotorisdesignedwhichisshapedasquarter-spherical-segment.ThematerialusedinthisdesignisNdFeBpermanentmagnet.Rotors3DstaticmagneticanalysisiscalculatedbyusingfiniteelementmethodFEM.Becauseofthehighproductioncostofthisdesignedrotoritisdwelledupondifferentrotordesignsthatcansupplythesamemagneticefficiency.Onethreeandfivepartscylindricalmagnetsphericalrotorsaredesigned.Themagnetpartsindesignedrotorareplacedintohalf-sphericalshapedTeflonastobuildthefourpole.Thusasphericalstructureisobtained.The3Dstaticmagneticanalysisoftherotormodelsisdoneandthesurfacefluxdensityvaluesarecomparedwiththequarter-spherical-segmentshapedrotor.Astheresultsoftheanalysisthesurfacefluxdensityvalueofthefivepermanentmagnetsphericalrotorisnearlyequaltothequarter-spherical-segmentshapedrotor.Thesurfacefluxvaluesofalldesignedrotorsatsurfaceleveland1 mmfromthesurfacearecalculatednumericallywiththehelpofMathematica®software.ThustheresultsfoundbyusingFEMandtheapplicationresultsaresupportedbynumericalresults.NdFeB35permanentmagnetisusedinthedesignoftherotor.Tofindapproximatevaluesthefactoryresultsaretakenintoconsideration.Atfirstthe3Dmodelsoftherotorsareconstructedandthenthematerialisselected.Thedirectionsofthemagneticfluxofthepermanentmagnetsareselectedappropriately.Todecreasethefailurepercenttominimumlevelasensitivemeshisdonetoarotorwhosemodelissketchedandthematerialselectionisdetermined.Themagneticfluxdensityvaluesareshowngraphicallybysketchingcontoursontothesurfaceoftherotor.Sothemagneticfluxdensityvaluesformedbydifferentrotorstructuresareexpressedgraphicallyandtherotorstructuresthatwillprovidethesameefficiencyareselected.ArticleOutline
1.Introduction
2.Sphericalrotordesign
3.Differentrotordesigns
3.
1.Sphericalrotorformedbyone-componentpermanentmagnetincylindershape
3.
2.Sphericalrotorformedbythree-componentpermanentmagnetincylindershape
3.
3.Sphericalrotorformedbyfive-componentpermanentmagnetincylindershape
4.Magneticanalysisofdifferentrotordesigns
5.Magneticfluxdensity
6.ConclusionsReferencesVitaeDesignandanalysisofanovelinsetpermanentmagnetsynchronousmotor OriginalResearchArticleJournalofMagnetismandMagneticMaterialsThispaperpresentsthedesignofapermanentmagnetPMsynchronousmotorwiththemagnetslaidflushinslotsletintotherotorsurfacecalledinsetmagnetrotor.Thefiniteelementfieldanalysiscoupledwiththedrivecircuitequationsarebrieflydiscussedforobtainingthemotorperformance.Experimentalresultsobtainedareingoodagreementwiththefiniteelementanalysis.ArticleOutline
1.Introduction
2.Motordesign
3.Finiteelementanalysis
4.ResultsanddiscussionReferences06/00302Designoptimisationofpermanentmagnetsynchronousmotorsforhightorquecapabilityandlowmagnetvolume:Vaez-ZadehS.andGhasemiA.R.ElectricPowerSystemsResearch2005742307–313 FuelandEnergyAbstractsMinimizationofcoggingtorqueinpermanentmagnetmotorsbyteethpairingandmagnetarcdesignusinggeneticalgorithm OriginalResearchArticleJournalofMagnetismandMagneticMaterialsCoggingtorqueisoftenaprincipalsourceofvibrationandacousticnoiseinhighprecisionspindlemotorapplications.InthispapercoggingtorqueisanalyticallycalculatedusingenergymethodwithFourierseriesexpansion.Itshowsthatcoggingtorqueiseffectivelyminimizedbycontrollingairgappermeancefunctionwithteethpairingdesignandbycontrollingfluxdensityfunctionwithmagnetarcdesign.Foranoptimizationtechniquegeneticalgorithmisappliedtohandletrade-offeffectsofdesignparameters.Resultsshowthattheproposedmethodcanreducethecoggingtorqueeffectively.FiniteelementanalysisofthecoggingforceinthelinearsynchronousmotorarrayfortheThirtyMeterTelescope OriginalResearchArticleMechatronicsInthispaperafiniteelementanalysisofthecoggingforcegeneratedbyanarrayoflinearsynchronousmotorsLSMmovingonacurvilineartrackispresented.ThissystemisunderconsiderationasthedrivingsystemforthetwomainaxesoftheproposedThirtyMeterTelescopethatwillbebuiltinMaunaKeaHawaii.ThemainobjectiveofthisworkisthequantificationoftheeffectsofthecurvilineartrackofLSMarraysonthecoggingforce.Thefiniteelementanalysisiscarriedoutusingplanarcrosssectionsandtheresultsfoundareusedtofindanapproximatesolutionforthethree-dimensionalmodel.Theresultsshowthatthepresenceofthecurvilinear–configuredtrackincreasesthecoggingforceofasingleLSMsignificantlywhilethepresenceofthearrayofLSMsinteractsinlimitingtheincreaseinthecoggingforce.AgeometricoptimizationinregardstotherelativepositionsoftheLSMsalongthecurvilineartracksissubsequentlycarriedoutinordertoreducethetotalcoggingforce.ArticleOutline
1.Introduction
2.Magneticfieldequationandforcecalculation
3.Model
3.
1.Geometry
3.
2.Materials
3.
2.
1.Laminations
3.
2.
2.Anti-coggingcomponents
3.
2.
3.Permanentmagnets
3.
2.
4.Othercomponents
3.
3.Assumptions
3.
4.Solutionusing2Dplanarsections
4.Finiteelementanalysis
4.
1.Parametricanalysis
4.
1.
1.LaminationBHmodel
4.
1.
2.Anti-coggingcomponent’sdimension
4.
1.
3.Anti-coggingcomponent’sBHmodel
4.
1.
4.Motorconfigurations
4.
2.Effectsofthecurvilineartrackin2Dand3D
4.
3.Solutionforthefulldrivesystem
5.ConclusionsAcknowledgementsReferencesResearchhighlights►Thecoggingforceinacurvilinear–configuredtrackwithanarrayoflinearmotorswasstudied.►Suchtrackcanincreasethecoggingforceineachmotorduetotheinteractionwithadjacentmotors.►Max.increaseinthecoggingforcewas240%fortheelevationtrackcomparetothatofasinglemotor.►Totalcoggingforcewas160%higherwhennogapwaspresentbetweenthemotors.►Totalcoggingforcewasreducedto60%whentherelativepositionbetweenthemotorswasoptimized.Applicationofneuralnetworkinsuppressingmechanicalvibrationofapermanentmagnetlinearmotor OriginalResearchArticleControlEngineeringPracticeInthisstudyarecurrentneuralnetworkcompensatorforsuppressingmechanicalvibrationinapermanentmagnetlinearsynchronousmotorPMLSMisstudied.ThelinearmotoriscontrolledbyaconventionalPIvelocitycontrollerandthevibrationoftheflexiblemechanismissuppressedbyusingahybridrecurrentneuralnetwork.ThedifferentialevolutionstrategyandKalmanfiltermethodareusedtoavoidthelocalminimumproblemandestimatethestatesofsystemrespectively.TheproposedcontrolmethodisfirstlydesignedbyusinganonlinearsimulationmodelbuiltinMatlabSimulinkandthenimplementedinapracticaltestrig.Theproposedmethodworkssatisfactorilyandsuppressesthevibrationsuccessfully.ArticleOutline
1.Introduction
2.Systemmodel
2.
1.Non-idealitiesofPMLSM
3.Controllerdesign
3.
1.Currentcontrollerofthelinearmotor
3.
2.Theneuralnetworkdesign
3.
3.DifferentialevolutionDEstrategy
3.
4.Referencemodel
3.
5.Stateestimation
4.Results
4.
1.Verificationofthesimulationmodel
4.
2.Neuralnetworkcompensator
5.ConclusionsReferences41FPGAimplementationofadaptiveANNcontrollerforspeedregulationofpermanentmagnetsteppermotordrives OriginalResearchArticleEnergyConversionandManagementVolumeDynamicmodeltrackingdesignforlowinertiahighspeedpermanentmagnetacmotors OriginalResearchArticleISATransactionsPermanentmagnetacPMACmotorshaveexistedinvariousconfigurationsformanyyears.Theadventofrare-earthmagnetsandtheirassociatedhighlyelevatedlevelsofmagneticfluxmakesthepermanentmagnetmotorattractiveformanyhighperformanceapplicationsfromcomputerdiskdrivestoallelectricracingcars.Theuseofbatteriesasaprimestorageelementcarriesacostpenaltyintermsoftheunladenweightofthevehicle.Minimizingthiscostfunctionrequirestheminimumelectricmotorsizeandweighttobespecifiedwhilestillretainingacceptablelevelsofoutputtorque.Thistradeoffcanbeachievedbyapplyingatechniqueknownasfluxweakeningwhichwillbeinvestigatedinthispaper.ThetechniqueallowsthespeedrangeofaPMACmotortobegreatlyincreasedgivingaconstantpowerrangeofmorethan4:
1.Adynamicmodelreferencecontrollerispresentedwhichhasadvantagesineaseofimplementationandisparticularlysuitedtodynamiclowinertiaapplicationssuchasclutchlessgearchanginginhighperformanceelectricvehicles.Thebenefitsofthisapproacharetomaximizethetorquespeedenvelopeofthemotorparticularlyadvantageouswhenconsideringlowinertiaoperation.Thecontrollerisexaminedexperimentallyconfirmingthepredictedperformance.Estimationofparametersofinteriorpermanentmagnetsynchronousmotors OriginalResearchArticleJournalofMagnetismandMagneticMaterialsDeterminationofmagneticfieldconstantofDCpermanentmagnetmotorpoweredbyphotovoltaicformaximummechanicalenergyoutput RenewableEnergyAnewnonlinearmagneticcircuitmodelfordynamicanalysisofinteriorpermanentmagnetsynchronousmotor OriginalResearchArticleJournalofMagnetismandMagneticMaterialsStudyofcoggingtorqueinsurface-mountedpermanentmagnetmotorswithenergymethod OriginalResearchArticleJournalofMagnetismandMagneticMaterialsBoundingadomaincontainingallcompactinvariantsetsofthepermanent-magnetmotorsystem OriginalResearchArticleCommunicationsinNonlinearScienceandNumericalSimulationComplexdynamicsinapermanent-magnetsynchronousmotormodel OriginalResearchArticleChaosSolitonsFractalsRobustPIDcontroldesignforpermanentmagnetsynchronousmotor:Ageneticapproach OriginalResearchArticleElectricPowerSystemsResearchMagneticfieldmodelingandoptimaloperationalcontrolofasingle-sideaxial-fluxpermanentmagnetmotorwithcenterpoles OriginalResearchArticleJournalofMagnetismandMagneticMaterialsAdetailedapproachforanalyzingmagneticfielddistributionsofasingle-sidedaxial-fluxpermanentmagnetmotorwithcenterpoleswillbeprovided.Basedonthedevisedfluxmodeltherelatedposition-dependenttorqueandaxialforceofthemotorcanbesystematicallydeveloped.Byincorporatingadequatecontroldesignstheoptimaloperationalperformanceofthemotorsystemcanbeconvenientlyachieved.Resultsshowedthatnotonlythemotorstructureissuitableforrelatedmilitaryandtransportationapplicationsbutalsothemagneticfieldmodelcanprovideappropriatemathematicalbasisforrelativeoperationalrealizations.ArticleOutline
1.Introduction
2.Themotorsystem
3.Systemoperationalcontrol
4.ConclusionAcknowledgementsReferences。