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1、ANovelMagnetic-gearedDoublySalientPermanentMagnetMachineforLow-SpeedHigh-TorqueApplicationsXiaoyongZhu*,YanbiaoSun,LiQuan,QianDingSchoolofElectricalandInformationEngineering,JiangsuUniversity,Zhenjiang,212013,ChinaE-mail:zxyff@ujs.edu.cnAbstract—Magnet
2、icgearisbecomingattractiveduetoitsloadingisoftenemployedtoincreasethetorquedensityinthesignificantfeatures,suchasreducedacousticnoise,maintenance-lowspeedoperation.However,themaximumelectricloadingfreeandinherentoverloadedprotection.Inthispaper,aofconv
3、entionalrotor-PMverniermachineshavingpermanentmagnetic-geareddoublesalientpermanentmagnetmachineismagnetsontherotormaybelimitedbytheallowablepresented.Thekeyistonewlyaddtheflux-modulatedteethintemperatureriseofthemagnetsandneedtopreventpartialtheouterp
4、artofthestatorpole.Bothfiniteelementanalysisandirreversibledemagnetization[10].Whenthemagnetsareexperimentalresultsshowthattheproposedmotornotonlyplacedonthestator,asinstator-PMmachines,theirmaintainstheadvantagesofdoublysalientpermanentmagnetmotors,bu
5、tofferstheperformancesoflow-speedandhigh-temperaturerisemaybemoreeasilymanagedandtheriskoftorque.demagnetizationisreducedsignificantly[11-12].I.INTRODUCTIONInordertotransmittorqueorforcebetweenseparateparts,themotorwithmechanicalgearboxesareextensively
6、usedinavarietyapplications.Sincethemechanicalgearboxesarecontactmechanisms,transmissionloss,gearnoiseandregularlubricationareinevitable.Recently,theconceptionofcoaxialmagneticgearhasbeenpaidmuchattention,Fig.1showsacoaxialmagneticgear[1],thetypeofmagne
7、ticgearhavesomedistinctadvantage,suchasreducedacousticnoise,highpowerdensity,improvedutilizationofpermanentmagnetsandFig.1.Topologyofmagneticgear[1].inherentoverloadprotection.ByincorporatingacoaxialmagneticgearintotheconventionalPMmachinedirectly,thec
8、oaxialmagnetic-gearedPMmotorcandevelopedforelectricvehiclesandwindpowergenerationwherelow-speedhigh-torqueanddirectdrivearebeingsought[2].However,theproposedcoaxialmagnetic-gearedPMmotorisoftenassociatedwithcomplexstructuresinceitinvolv