电机学英文版课件01

Copyright©TheMcGraw-HillCompanies,Inc.Permissionrequiredforreproductionordisplay.1-0ElectricMachineryandDriveFallSemester2009Dept.ofElectricalEngineeringCopyright©TheMcGraw-HillCompanies,Inc.Permissionrequiredforreproductionordisplay.1-1PowerPointSlidestoaccompanyElectricMachineryFourthEditionStephenJ.ChapmanChapter1IntroductiontoMachineryPrinciplesCopyright©TheMcGraw-HillCompanies,Inc.Permissionrequiredforreproductionordisplay.1-2Objectives•Toinstillanunderstandingoftheunderlyingelectromagneticeffectspermittingelectricmachineoperationandintroducebasicmachinetypes•Todescribetheconstructionofthesemachines•Toexaminethemaintypesofthesemachines•TobeskilledinanalyzingthecharacteristicofthesemachinesIntroductionandOverviewCopyright©TheMcGraw-HillCompanies,Inc.Permissionrequiredforreproductionordisplay.1-3•ReferenceBooks•1.TheodoreWildi.ElectricalMachines,Drives,andPowerSystems(FifthEdition)PearsonEducation.2002•2.A.E.Fitzgerald,CharlesKingsley,Jr.,StephenD.UmansElectricMachinery(SixthEdition)McGraw-Hill.2003•3.李发海王岩.电机与拖动基础北京：清华大学出版社，1994.4.顾绳谷.电机及拖动基础(上、下册)北京：机械工业出版社，1980•5.汤蕴缪史乃.电机学第二版北京：机械工业出版社，2005.1•6.姚舜才付巍赵耀霞电机学与电力拖动技术北京：国防工业出版社，2006.1Copyright©TheMcGraw-HillCompanies,Inc.Permissionrequiredforreproductionordisplay.1-4WhatisanElectric-MachineDrive?Copyright©TheMcGraw-HillCompanies,Inc.Permissionrequiredforreproductionordisplay.1-5Copyright©TheMcGraw-HillCompanies,Inc.Permissionrequiredforreproductionordisplay.1-6TypeofElectricalMachinesEMMotorGeneratorDCMotorACMotorSeparatelyExcitedNon-SeparatelyExcitedSeriesShuntCompoundSynchronousAsynchronousSinglePhaseDoublePhaseThreePhaseDCGeneratorACGeneratorCopyright©TheMcGraw-HillCompanies,Inc.Permissionrequiredforreproductionordisplay.1-7•AngularPosition•AngularVelocity•AngularAccelerationdtddtdrv260mmmmffndtddtdvaCopyright©TheMcGraw-HillCompanies,Inc.Permissionrequiredforreproductionordisplay.1-8•TorqueTT=(ForceApplied)(PerpendicularDistance)=(F)(rsin)•Newton’sLawofRotationT=J•WorkW•PowerPTdWFdrWTdtdrTTrdtddtdWPFvdtdrFFrdtddtdWPdtdWP)()(TWFrWCopyright©TheMcGraw-HillCompanies,Inc.Permissionrequiredforreproductionordisplay.1-9ElectricDrives􀁑Anelectricdriveisasystemthatconvertselectricalenergytomechanicalenergy•Parts:–electricmotor(orseveral)–controlsystem(includingsoftware)•Constant-speeddrives–onlyastart/stopandprotectionsysteminadditiontotheelectricmotor•Variable-speeddrives(VSDs)–includeanelectronicpowerconverterCopyright©TheMcGraw-HillCompanies,Inc.Permissionrequiredforreproductionordisplay.1-10ElectricDriveandtheSurroundingSystemCopyright©TheMcGraw-HillCompanies,Inc.Permissionrequiredforreproductionordisplay.1-11AccelerationofInertialMass•TorqueneededforacceleratingthemomentofinertiaJ:•Momentofinertiaofathin-walledcylinderCopyright©TheMcGraw-HillCompanies,Inc.Permissionrequiredforreproductionordisplay.1-12•MomentofinertiaofasolidcylinderEquationofMotiondtdJTTmLCopyright©TheMcGraw-HillCompanies,Inc.Permissionrequiredforreproductionordisplay.1-13InertiaJisatheoreticalparameter.Inengineering,FlyWheelGD2isusedtoreplaceinertia.Thatis：dtdnGDTTL3752Copyright©TheMcGraw-HillCompanies,Inc.Permissionrequiredforreproductionordisplay.Simplemagneticcircuit.Figure1.11-14Copyright©TheMcGraw-HillCompanies,Inc.Permissionrequiredforreproductionordisplay.Magneticcircuitwithairgap.Figure1-31-15Copyright©TheMcGraw-HillCompanies,Inc.Permissionrequiredforreproductionordisplay.1-16•ProductionofaMagneticFieldAmpere’sLawH=magneticfieldintensity(Ampere-turnspermeter)B=magneticfluxdensity/intensityofmagneticinduction=magneticpermeabilitynetIdlHcclNiHNiHlHBclNiHBCopyright©TheMcGraw-HillCompanies,Inc.Permissionrequiredforreproductionordisplay.1-17•Magneticflux•Magnetomotive•MagneticreluctanceAdABclNiABABAmRFAlRcmCopyright©TheMcGraw-HillCompanies,Inc.Permissionrequiredforreproductionordisplay.1-18Analogybetweenelectricandmagneticcircuits.(a)Electriccircuit,(b)magneticcircuit.Figure1-4Copyright©TheMcGraw-HillCompanies,Inc.Permissionrequiredforreproductionordisplay.1-19•Kirchhoff'sLawinMagneticCircuit03210Copyright©TheMcGraw-HillCompanies,Inc.Permissionrequiredforreproductionordisplay.1-20FINIlHknk1lδINmmRRHHlF210Copyright©TheMcGraw-HillCompanies,Inc.Permissionrequiredforreproductionordisplay.1-21Air-gapfringingfields.Figure1-6Copyright©TheMcGraw-HillCompanies,Inc.Permissionrequiredforreproductionordisplay.1-22Simplesynchronousmachine.Figure1-9Copyright©TheMcGraw-HillCompanies,Inc.Permissionrequiredforreproductionordisplay.1-23(a)Magneticcircuitand(b)equivalentcircuitforExample1.3.Figure1.6Copyright©TheMcGraw-HillCompanies,Inc.Permissionrequiredforreproductionordisplay.1-24MATLABplotofinductancevs.relativepermeabilityforExample1.5.Figure1.7Copyright©TheMcGraw-HillCompanies,Inc.Permissionrequiredforreproductionordisplay.1-25Magneticcircuitwithtwowindings.Figure1.8Copyright©TheMcGraw-HillCompanies,Inc.Permissionrequiredforreproductionordisplay.1-26B-HloopsforM-5grain-orientedelectricalsteel0.012inthick.Onlythetop