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1、IEEETRANSACTIONSONINDUSTRYAPPLICATIONS,VOL.33,NO.1,JANUARYFEBRUARY199743SpeedControlofInteriorPermanentMagnetSynchronousMotorDrivefortheFluxWeakeningOperationJang-MokKim,StudentMember,IEEE,andSeung-KiSul,Member,IEEEAbstruct-Anovelflux-weakeningschemeforthein
2、teriordecouplingcontrollerwereproposedforthefluxweakeningpermanentmagnetsynchronousmotor(IPMSM)isproposed.operation.ThisvoltagecompensatoroperateswellintunedThisisimplementedbasedontheoutputofthesynchronousPIoperatingconditions.Butifthereisanextravoltagemarg
3、incurrentregulator-referencevoltagetothePWMinverter.Theduetotheweakeningofthepermanentmagnetfluxlinkageonsetoffluxweakeningandthefluxlevelareadjustedinherentlybytheoutervoltageregulationlooptopreventsaturationofaccordingtotemperatureriseordclinkvoltagevariat
4、ions,thethecurrentregulator.Attractivefeaturesofthisfluxweakeningdrivesystemmaydivergebecauseofanimproperoperationschemeincludenodependencyonthemachineparameters,theofthevoltagecompensator.guaranteeofcurrentregulationatanyoperatingcondition,andInpreviousstud
5、iestheperformanceofIPMSMdrivesystemsmoothandfasttransitionintoandoutofthefluxweakeninginanextendedspeedregionwasstronglydependentonthemode.Experimentalresultsatvariousoperatingconditionsin-cludingthecaseofdetunedparametersarepresentedtoverifymotorparametersb
6、ecausethemodelofIPMSM,especiallythefeasibilityoftheproposedcontrolscheme.thestatorvoltageequationofthemotor,isbasicallyusedforthefluxweakeningcontrol.Unfortunately,thefluxlinkageofIndexTerms-Fluxweakening,IPMSM,outervoltageregula-tionloop.permanentmagnetandt
7、hestatorresistanceofthemotorvaryaccordingtothetemperature[8].Moreover,thecl-axisandq-axisself-inductance,Lds,Lqs,varywiththeairgapflux[9].In1.INTRODUCTIONtheconstanttorqueregionanimpropertuningofparametersHEinteriorpermanentmagnetsynchronousmotoroftheIPMSMdr
8、ivemayresultinonlyasmallredlucedtorqueT(IPMSM)hasgainedanincreasingpopularityinrecentandasmalldegradationoftheefficiencyofthemachineyearsforawidevarietyofindustrialdriveapplications.ThebecauseIP
