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1、长定子用互补型模块化磁通切换型永磁直线电机优化设计DesignOptimizationofaComplementaryandModularLinearFlux-SwitchingPermanentMagnetMotorforLongStatorApplications#4O3525oCaoRuiwul,ChengMingl,HuaWeil,WangXinl,ZhaoWcnxiang2**1.Schoolofelectricalengineering,SoutheastUniversity,Nanjing210096;2.SchoolofElectricalandI
2、nformationEngineering,JiangsuUniversity,JiangSuZhenjiang217>2013Abstract:Thispaperinvestigatethedesignoptimizationofanewmodular1inearflux-switchingpermanentmagnetMLFSPMmotorwithcomplementary,symmetricalandmodularstructureandcompareitsperformancewiththeconventionallinearflux-switchingp
3、ermanentmagnetLFSPM.Thekeyoftheproposedstruetureisthateachphasearmaturewindingiscomposedoftwocoilswhosepositionsaremutuallyonehalfofthestatorpolepitchandtherearcfluxbarrierbetwecnthetwoadjacent"E”models.Hence,theback-EMFwaveformofeachphaseissinusoidalandthethreephasemagnetcircuitsares
4、ymmetrical.WefirstoptimizethedesignandanalyzetheelectromagneticperformanccoftheproposedMLFSPMmotorbymcansoffiniteclomentmethodFEM.Then,thestrueturcoftheconventionalLFSPMmotorisalsooptimizedandthencomparedwiththeproposedmotorbasedonthesamemethod.Theresultsrevealthattheproposedmotorhass
5、inusoidalandsymmetricalthree-phaseback-EMFwaveforms,smallercoggingforce,andsmallerforceripplethantheexistingmotors.Moreover,aprototypeoftheproposedmotorisbuilttovalidatethestudy.Keywords:Linearmotor;permanentmagnetmotor;flux-switching;modular0IntroductionLinearmotorsproduceadirectthru
6、stforcewithouttheneedofconversionfromrotationaltorquetolinearforce.Therefore,theyareidealforrailtransportationsystems[l]-[5].Theconventional1incarpermanent-magnctsynchronousmotorLPMSMexhibitshigherefficiencyandhigherpowerdensitythanlinearinductionmotors[6].However,inapplicationswithal
7、ongstator,suchasinurbanrailsystems,theconventionalLPMSMincvitablyresultsinsignificantcostincreaseduetoalargeamountofmagnetsorarmaturewindingssetalongthelongstator.LinearswitchedreluctancemotorsLSRMhasasimplerandmoreruggedstructure,andalowersystemcostthandirect-driveLPMSMduetoitssimple
8、stato
