热泵工程 艾欧史密斯(中国)热水器

AveryfastdirecttorquecontrolforinteriorpermanentmagnetsynchronousmotorsstartupOriginalResearchArticleEnergyConversionandManagementSelectionofthestatorfluxcommandindirecttorquecontrol(DTC)ofpermanentmagnetsynchronousmotorsisveryimportantasitaffectsmachineperformance.Forsteadystateoperation,itcanhelptodecreasethestatorcurrentormachinelosses.However,inordertogetafasttorqueresponseduringmotorstartup,oneneedstochangeboththestatorfluxangleandmagnitude.Inthispaper,amethodispresentedtofindtheoptimalvoltagevectorstochangeboththefluxangleanditsmagnitudethatresultsinhighspeeddynamicsforthetorqueresponse.Theclosedformformulagivenfortheoptimalvoltagevectorisderivedbasedonmaximizingthetorquechangeineachsamplingtime.ThesimulationresultsshowthatthepresentedmethodissuperiortotheconventionalDTC.Inotherwords,itisshownthatthevoltagevectorsderivedfromtheswitchingtableforconventionalDTCarenottheoptimalvoltagevectorsforthesituationinwhichthereisastepchangeinthetorquecommand.ArticleOutline1.Introduction2.IPMmachinemodelandDTCfundamentals3.Fluxcommandeffectonmachineperformance4.Optimalvoltagevector4.1.Optimalvoltagevectorselection4.2.SVMtoapplyoptimumvoltagevectortomachine5.Systemperformance5.1.Systemblockdiagram5.2.Simulationresults6.ConclusionsAcknowledgementsAppendixA.MotordataReferencesAhybridcontrollerforthespeedcontrolofapermanentmagnetsynchronousmotordriveOriginalResearchArticleControlEngineeringPracticeThispaperintroducesahybridcontroller(HC)whichconsistsofaparallelconnectedslidingmodecontroller(SMC)andaneuro-fuzzycontroller(NFC)forthespeedcontrolofapermanentmagnetsynchronousmotor(PMSM)drive.TheaimofthisstudyistoobtainacontrollerthateliminatesthechatteringphenomenonandprovidesafastandsmoothdynamicresponseforthespeedcontrolofaPMSMdrive.Therefore,usinganerrorbandmethod,thesystemiscontrolledbytheSMCtogetafastdynamicresponseintransientmodeandisalsocontrolledbytheNFCtogetasmoothdynamicresponseinsteadystatemode.Toillustratetheperformanceoftheproposedcontroller,thesimulationandexperimentalstudiesarepresentedseparatelyfortheSMC,NFCandHC.Theresultsarecomparedwitheachotheranddiscussedindetail.ArticleOutline1.Introduction2.ModelingofthePMSMdrivesystem2.1.Motorandinverter2.2.HysteresisbandPWM2.3.Torque3.Designofthehybridcontroller(HC)3.1.Designoftheslidingmodecontroller3.2.DesignoftheNFC3.2.1.Feedforwardalgorithm3.2.2.Backpropagationlearningalgorithm4.Simulationandexperimentalresults5.ConclusionsReferencesNonlinearpredictivecontrollerforapermanentmagnetsynchronousmotordriveOriginalResearchArticleMathematicsandComputersinSimulationAnonlinearpredictivecontroller(NPC)forapermanentmagnetsynchronousmotor(PMSM)isproposedinthispaper.Itsobjectiveishighperformancetrackingoftherotorspeedtrajectorywhilemaintainingthed-axiscomponentofthearmaturecurrentatzero.Theloadtorqueandthemismatchedparametersareconsideredtobeunknownperturbations.Toensurerobustnessagainsttheseperturbations,adisturbanceobserverisdesignedusinganewgainfunction,andintegratedintothecontrollaw.Thecombinationofthenonlinearpredictivecontrollerandthedisturbanceobserverworksasanonlinearcontroller.Theoverallclosed-loopsystemisprovedtobegloballyasymptoticallystabledependingonthedesignparameters.Thevalidityoftheproposedcontrollerwastestedbysimulations.Satisfactoryresultswereobtainedwithrespecttothetrackingofthespeedtrajectoryanddisturbancerejection.ArticleOutline1.Introduction2.MathematicalmodelofthePMSM3.NonlinearpredictivecontrolofaPMSM3.1.FormulationoftheNPCproblem3.2.Theinputrelativedegree3.2.1.Theinputrelativedegreeoftheoutputy13.2.2.Theinputrelativedegreeoftheoutputy23.2.3.TheinputrelativedegreeofthePMSMoutputs4.Disturbanceobserver5.Stabilityoftheclosedloopsystemundertheloadtorqueobserver6.BlockdiagramoftheproposedNPCforaPMSM7.Simulationresults7.1.Scenario17.2.Scenario28.ConclusionAcknowledgementsReferencesTorqueripplereductioninexterior-rotorpermanentmagnetsynchronousmotorOriginalResearchArticleJournalofMagnetismandMagneticMaterialsThepaperpresentstorqueripplereductioninpermanentmagnetsynchronousmotorwithexterior-rotor.Theinfluenceofthemagnetpolearcwidthandtheinfluenceofthesupplycurrentwaveformonthetorquerippleareconsideredintheanalysis.Theresultsoftheanalysisareobtainedbythefiniteelementmethodsimulationandareverifiedexperimentallyaswell.Thereductionoftotaltorquerippleatnominalloadconditionslessthan2%isachievedbypropermotormagnetpolearcdesignandbyapplyingtheoptimalstatorcurrentwaveformcontrol.ArticleOutline1.Introduction2.Methodofanalysis3.Results4.ConclusionReferencesEffectofmagneticpropertiesofnon-orientedelectricalsteelontorquecharacteristicsofinterior-permanent-magnetsynchronousmotorOriginalResearchArticleJournalofMagnetismandMagneticMaterialsThetorquecharacteristicsofinterior-permanent-magnetsynchronousmotor(IPMSM),inwhichcorematerialswereourconventionalnon-orientedelectricalsteel35SX250andourdevelopedsteels35SXH,27SXHwithhighpermeability,weremeasuredbyapulsewavemodulation(PWM)invertercontrol.Thetorquecharacteristicsofthemotorwithdevelopedsteelsweresuperiortothatofconventionals