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1、RenewableEnergy22(2001)151±157www.elsevier.com/locate/reneneTheuseofanaxial¯uxpermanentmagnetin-wheeldirectdriveinanelectricbicyclea,b,1PerRogerJohansen*,DeanPatterson,bbChristopherO'Keefe,JohnSwensonaNorwegianUniversityofScienceandTechnology,DepartmentofElectricalPowerEngineering,N-7034Trondh
2、eim,NorwaybNorthernTerritoryCentreforEnergyResearch,NorthernTerritoryUniversity,Darwin,NT0909,AustraliaAbstractTheresearchdescribedinthispaperconcentratesonthedevelopmentofanelectronicconverter.Successfulcompletionofthisconverterprovidesthe®nalcomponentforthelargerelectricbicycleproject.Thecon
3、trollerdevelopedforthebicycleisratedat400Wandishard-switched.ItusesMOSFETsaspowerswitchingdevices.TherearethreeHalleectsensorsplaced120electricaldegreesapartfromeachotherinthemotorforvelocityandpositionsensing.Thetorquegeneratedbythemachineiscontrolledbyhysteresisbandcurrentcontrol.Inorderfort
4、hemotor/controllertobecommerciallyviable,particularattentionwaspaidtothecostsofthecontroller.Theresult,anecientyetcheapcontroller.Measurementofeciencyisdicultinhighperformancepowerelectroniccontrollers[PattersonDJAveryhigheciencycontrollerforanaxial¯uxpermanentmagnetwheeldriveinasolarpoweredve
5、hicle.2ndIEEEInternationalConferenceonPowerElectronicsDrivesandEnergySystemsforIndustrialGrowth,IEEEPEDES'98,Perth,30thNovember±3rdDecember,1998.].Thepaperincludesdiscussionofacalorimetricmethodformeasurement.72000PublishedbyElsevierScienceLtd.*Correspondingauthor.E-mailaddresses:roger_johanse
6、n@hotmail.com;per.roger.johansen@scc.no(P.R.Johansen),patterson@darwin.ntu.edu.au(D.Patterson).1Tel.:+61-8-89-466365;fax:+61-8-89-466993.0960-1481/01/$-seefrontmatter72000PublishedbyElsevierScienceLtd.PII:S0960-1481(00)00051-3152P.R.Johansenetal./RenewableEnergy22(2001)151±1571.IntroductionIti
7、sgenerallyrecognisedthatthereisaneedfornewmethodsofaordable,non-pollutingpersonaltransportation.The®rstelectricvehicle(EV)wasproducedin1885,butduringthelast100yearstherehasbeenverylittleprogressinthedevelopmentofEVs.Itisdiculttogetthepu
