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1、InternationalJournalofAppliedElectromagneticsandMechanics19(2004)625629625IOSPressAnewelectromechanicalconceptforhybridpowertrainsYounesTahria,MariemSahbia,AhmedMasmoudia,∗andAhmedElantablybaResearchUnitonRenewableEnergiesandElectricVehicles,UniversityofSfax,SfaxE
2、ngineeringSchool,B.P.W,3038Sfax,TunisiaTel.:+21674274088;Fax:+21674275595;E-mail:a.masmoudi@enis.rnu.tnbAllisonTransmissionDivisionofGeneralMotors,P.O.Box502650,Indianapolis,IN,USATel.:3179152721;Fax:3179152703;E-mail:ahmed.el-antably@gm.comAbstract.Thepaperisdevo
3、tedtoafiniteelementanalysisbaseddesignofanelectromagneticsystemdedicatedforhybridpropulsionsystems.Itconsistsoftwoconcentricpermanentmagnetmachines,yieldingtheso-calledsinglestatordualrotorpermanentmagnetmachine,withaninnerrotor,anouterrotorandastatorsandwichedbetw
4、eenthetworotors.Inordertodecouplemagneticallybothmachines,anonmagneticmaterialringisinsertedbetweenthetwostators.Givingthesmalldimensionsoftheinnermachine,specialattentionisfocuseduponitssizing.Keywords:Singlestatordualrotorpermanentmagnetmachine,magneticdecouplin
5、g,torqueproductioncapability1.IntroductionTillthesixtieth,busesmanufacturersdidnotworryaboutthecostoffuel.Theyhadneverheardofairpollution,andtheyhadneverthoughtaboutlifecycle.Easeofoperationwithreducedmaintenancecostsmeanteverythingbackthen.Nowadays,cleanairmandat
6、esaredrivingthemarkettoembracenewpropulsionsystemsinanattempttoassistefficientlytheinternalcombustionengine(ICE).Ofparticularinterestarehybridpropulsionsystems,wherethepowertrainisbuiltaroundanICEandanelectricdrive.Basically,anhybridpropulsionsystemincludestwoelect
7、ricmachines:oneisusedasapropellerwhiletheotherismainlyusedforbatterycharge.Althoughthesemachinesplaydifferentroles,theiroperatingcyclesaremoreorlesslinked.Moreover,theirlocationswithinthepowertrainrepresentadrawbackfromthepointofviewofvolumeoptimization.Forthesere
8、asons,thereiscurrentlyatrendincombiningthetwomachinesintoonecompactelectromechanicalsetinanattempttoreducevolume,increasepowerdensity,anddecreasecost.To
