电机学英文版课件01

ElectricMachineryandDriveFallSemester2009,Dept.ofElectricalEngineering,PowerPointSlidestoaccompanyElectricMachineryFourthEditionStephenJ.Chapman,Chapter1IntroductiontoMachineryPrinciples,ObjectivesToinstillanunderstandingoftheunderlyingelectromagneticeffectspermittingelectricmachineoperationandintroducebasicmachinetypesTodescribetheconstructionofthesemachinesToexaminethemaintypesofthesemachinesTobeskilledinanalyzingthecharacteristicofthesemachines,IntroductionandOverview,ReferenceBooks1.TheodoreWildi.ElectricalMachines,Drives,andPowerSystems(FifthEdition)PearsonEducation.20022.A.E.Fitzgerald,CharlesKingsley,Jr.,StephenD.UmansElectricMachinery(SixthEdition)McGraw-Hill.20033.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，19805.汤蕴缪史乃.电机学第二版北京：机械工业出版社，2005.16.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，2006.1,WhatisanElectric-MachineDrive?,TypeofElectricalMachines,EM,Motor,Generator,DCMotor,ACMotor,SeparatelyExcited,Non-SeparatelyExcited,Series,Shunt,Compound,Synchronous,Asynchronous,SinglePhase,DoublePhase,ThreePhase,DCGenerator,ACGenerator,AngularPositionAngularVelocityAngularAcceleration,TorqueTT=(ForceApplied)(PerpendicularDistance)=(F)(rsin)NewtonsLawofRotationT=JWorkWPowerP,ElectricDrivesAnelectricdriveisasystemthatconvertselectricalenergytomechanicalenergyParts:electricmotor(orseveral)controlsystem(includingsoftware)Constant-speeddrivesonlyastart/stopandprotectionsysteminadditiontotheelectricmotorVariable-speeddrives(VSDs)includeanelectronicpowerconverter,ElectricDriveandtheSurroundingSystem,AccelerationofInertialMass,TorqueneededforacceleratingthemomentofinertiaJ:,Momentofinertiaofathin-walledcylinder,Momentofinertiaofasolidcylinder,EquationofMotion,InertiaJisatheoreticalparameter.Inengineering,FlyWheelGD2isusedtoreplaceinertia.Thatis：,CopyrightTheMcGraw-HillCompanies,Inc.Permissionrequiredforreproductionordisplay.,Simplemagneticcircuit.Figure1.1,1-14,CopyrightTheMcGraw-HillCompanies,Inc.Permissionrequiredforreproductionordisplay.,Magneticcircuitwithairgap.Figure1-3,1-15,ProductionofaMagneticFieldAmperesLawH=magneticfieldintensity(Ampere-turnspermeter)B=magneticfluxdensity/intensityofmagneticinduction=magneticpermeability,MagneticfluxMagnetomotiveMagneticreluctance,Analogybetweenelectricandmagneticcircuits.(a)Electriccircuit,(b)magneticcircuit.Figure1-4,KirchhoffsLawinMagneticCircuit,Air-gapfringingfields.Figure1-6,Simplesynchronousmachine.Figure1-9,(a)Magneticcircuitand(b)equivalentcircuitforExample1.3.Figure1.6,MATLABplotofinductancevs.relativepermeabilityforExample1.5.Figure1.7,Magneticcircuitwithtwowindings.Figure1.8,B-HloopsforM-5grain-orientedelectricalsteel0.012inthick.Onlythetophalvesoftheloopsareshownhere.(ArmcoInc.)Figure1-10,DcmagnetizationcurveforM-5grain-orientedelectricalsteel0.012inthick.(ArmcoInc.)Figure1.10,Excitationphenomena.(a)Voltage,flux,andexcitingcurrent;(b)correspondinghysteresisloop.Figure1.11,Excitingrmsvoltamperesperkilogramat60HzforM-5grain-orientedelectricalsteel0.012inthick.(ArmcoInc.)Figure1-10,Hysteresisloop;hysteresislossisproportionaltothelooparea(shaded).Figure1-11,Corelossat60HzinwattsperkilogramforM-5grain-orientedelectricalsteel0.012inthick.(ArmcoInc.)Figure1.14,LaminatedsteelcorewithwindingforExample1.8.Figure1.15,(a)SecondquadrantofhysteresisloopforAlnico5;(b)secondquadrantofhysteresisloopforM-5electricalsteel;(c)hysteresisloopforM-5electricalsteelexpandedforsmallB.(ArmcoInc.)Figure1.16,MagneticcircuitforExample1.9.Figure1.17,MagneticcircuitforExample1.10.Figure1.18,Magnetizationcurvesforcommonpermanent-magnetmaterials.Figure1.19,Magneticcircuitincludingbothapermanentmagnetandanexcitationwinding.Figure1.20,PortionofaB-Hcharacteristicshowingaminorloopandarecoilline.Figure1.21,MagneticcircuitforExample1.11.Figure1.22,(a)MagnetizationcurveforAlnico5forExample1.11;(b)seriesofloadlinesforAg=2cm2andvaryingofvaluesofishowingthemagnetizationprocedureforExample1.11.Figure1.23,(a),(b),MagneticcircuitforProblem1.1.Figure1.24,MagneticcircuitforProblem1.6.Figure1.25,MagneticcircuitforProblem1.9.Figure1.26,InductorforProblem1.12.Figure1.27,Pot-coreinductorforProblem1.15.Figure1.28,InductorforProblem1.17.Figure1.29,ToroidalwindingforProblem1.19.Figure1.30,Iron-coreinductorforProblem1.20.Figure1.31,MagneticcircuitforProblem1.22.Figure1.32,SymmetricmagneticcircuitforProblem1.23.Figure1.33,ReciprocatinggeneratorforProblem1.24.Figure1.34,Configurationformeasurementofmagneticpropertiesofelectricalsteel.Figure1.35,MagneticcircuitforProblem1.28.Figure1.36,MagneticcircuitfortheloudspeakerofProblem1.34(voicecoilnotshown).Figure1.37,MagneticcircuitforProblem1.35.Figure1.38,ProductionofInducedForceOnaWirei=magnitudeofcurrentinthewireB=magneticfluxdensityvectorl=lengthofconductorinthemagneticfield,InducedVoltageOnaConductorMovingInaMagneticFieldv=velocityofthewireB=magneticfluxdensityvectorl=lengthofconductorinthemagneticfield,ThreePhasePower,Theinstantaneoustotalpowerisconstant!,ThreePhasePower,RealPowerperphaseisP=VpIpcos()RealPowerforallthreephasesisP=3VpIpcos()SinceforabalancedloadthepowerisconstantP(t)=3VpIpcos()alsoPowerinTermsofLineQuantitiesP=3VllIllcos(),ThreePhaseReactiveP