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Excitation研发培训,设计培训.ppt

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SynchronousMachines-ReactanceandExcitationCalculationStatorRevolvingMagneticFieldSynchronousRotorSynchronousMotorPhasorsandPhasorDiagramsPhasorDiagramExamplePhasorDiagramCont.CylindricalRotorSynchronousMachine:Duetotheevenairgap,theformulationsforbasicmachinequantitiesissimplified.Wewillconsiderthecylindricalmachinetheoryfirstandthenextendtheanalysistothesalientpolecase.AxisofFieldIaCylindricalRotorPhasorDiagramForSynchronousGeneratorFromthediagramitisevidentthatEr,thevoltageinducedinthestatorbytheeffectofthearmaturereactionflux,isinphasewithIaXl.SalientPoleSynchronousMachinesSalientPoleSynchronousMachineTwoReactionTheorySalientPoleSynchronousMachineTwoReactionTheory:IntroductionIaTwoReactionDiagramEaIaPoleFaceDesign-MagneticFieldsPoleFaceDesign–MagneticFieldsPoleFaceDesign–MagneticFieldPoleFaceDesign–MagneticFieldListofPoleConstantsPoleConstantsPoleConstantsPoleFaceDesign–MagneticFieldsPoleFaceDesign–MagneticFieldsPoleFaceDesign–MagneticFieldsPoleFaceDesign–MagneticFieldsPoleFaceDesign–MagneticFieldsReactanceCalculationsT=CommonReactanceFactor m=#phases L=StatorCoreLength f=frequency Z=SeriesConductorsperPhase Kw=WindingfactorStator P=#Polesa=PermeanceFactor D=DiameterofStatorBore P=#Poles Kg=Carter’sGapCoefficeint gmin=MinimumairgapatcenterofpoleArmatureLeakageReactanceisdeterminedusingamethodologyidenticaltotheinductionmachine.ExcitationCalculationsExcitationCalculationsExcitationCalculation ExcitationCalculationCont.FieldExcitationCont.IaFieldExcitationCont.FieldExcitationCont.FieldExcitationCont.FieldExcitationCont. mmfFieldExcitationCont.FieldExcitationCont.FieldExcitationCont.FieldExcitationCont.FieldExcitationFinishTHEEND