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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=CommonReactanceFactorm=#phasesL=StatorCoreLengthf=frequencyZ=SeriesConductorsperPhaseKw=WindingfactorStatorP=#Polesa=PermeanceFactorD=DiameterofStatorBoreP=#PolesKg=Carter’sGapCoefficeintgmin=MinimumairgapatcenterofpoleArmatureLeakageReactanceisdeterminedusingamethodologyidenticaltotheinductionmachine.ExcitationCalculationsExcitationCalculationsExcitationCalculationExcitationCalculationCont.FieldExcitationCont.IaFieldExcitationCont.FieldExcitationCont.FieldExcitationCont.FieldExcitationCont.mmfFieldExcitationCont.FieldExcitationCont.FieldExcitationCont.FieldExcitationCont.FieldExcitationFinishTHEEND