《航空工程技術(shù)英語》課件-Chapter 8 Electrical Power +教學(xué)課件：Electrical Power_第1頁
《航空工程技術(shù)英語》課件-Chapter 8 Electrical Power +教學(xué)課件：Electrical Power_第2頁
《航空工程技術(shù)英語》課件-Chapter 8 Electrical Power +教學(xué)課件：Electrical Power_第3頁
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ElectricalPower航空工程技術(shù)英語AMEnglish/8-1目錄CONTENTSGeneralConfiguration01ACPowerSupply02DCPowerSupply03ElectricalPowerTheelectricalpowerisusedforthecontrol,operation,andindicationofthevariousairplanesystemsonthegroundandinflight.Theelectricalpowerisobtainedfromthebattery,generatorandgroundsupportequipment.GeneralConfigurationPART01ElectricalPowerGeneralConfigurationThealternatingcurrentpowerissuppliedbytwoenginedrivengeneratorsfornormalinflightoperation.Agenerator,drivenbytheauxiliarypowerunit,cansupplyallpowerforgroundorflightoperation.Powercanbesuppliedonthegroundthroughtheexternalpower(ac)receptacle.Thedcpowerissuppliedfromthebatteryorconversionfromtheacpower.Theacanddcpowerisdistributedtothevarioussystemthroughtheleftandrightloadcontrolcentersintheflightcompartment.ThecontrolandindicationoftheelectricalsystemisfromtheP5overheadpanelintheflightcompartment.ElectricalPowerTheelectricalpowerforthegroundoperationofallelectricalloadsontheairplaneissuppliedbyanexternal3-phase,115vlot,400Hertzalternatingcurrentsystem.Thepowerissuppliedthroughanexternalpowerreceptacle.Theacexternalpowerreceptacleislocatedontherightsideoftheairplaneforwardofthenosewheelwell.GeneralConfigurationElectricalPowerGeneralConfigurationACPowerSupplyPART02ElectricalPowerACPowerSupplyTheconstantspeeddrive(CSD)islocatedontheleftsideoftheengine,onthefrontoftheaccessorygearbox.ThepurposeoftheCSDistoconvertthevariablespeedoftheenginetoaconstantspeedforthedrivengeneratortoproduceacpoweratconstantfrequency.ElectricalPowerThegeneratorsdrivenbytheengineproducetheacpowerrequiredbytheairplanesystemsprimarilyforflightoperation.Theacgeneratorisratedat50kilovolt–amperes,120/208volts,400Hz.Theunitiswithoutslip-ringscommutator,orbrushesoneitherthemaingeneratorortheexciter.Acompletegeneratorassemblyconsistsofanexcitergenerator,arotatingrectifierandamaingenerator.Theexciterconsistsofasix–poledcfieldandarotatingarmature.Theexciterfieldissuppliedwithdcpowerfromthevoltageregulator.Thiscausesa3-phasevoltagetobedevelopedintheexciterarmature.The3-phasevoltageisrectifiedandfedintotheacgeneratorrotatingfield.Therotatingfieldgeneratestheuseful115voutputvoltageintheacstator.ACPowerSupplyElectricalPowerTheGCRcanbetrippedbytheseautomaticactions:OvervoltageUndervoltageUFOFOvercurrentDifferentialprotection.ACPowerSupplyElectricalPowerACPowerSupplyDCPowerSupplyPART03ElectricalPowerDCPowerSupplyThebatteryislocatedintheelectroniccompartment,leftsidejustforwardoftheE2rack.Thepurposeofthebatteryistoprovidedcpowertocriticalairplanesystemsinabsenceofnormaldcsupplyfromthetransformerrectifier.ItisalsousedasabackuppowerfortheacsystemcontrolandprotectionandforstartingtheAPU.ThreetransformerrectifierunitsarelocatedintheelectroniccompartmentonE3rack.Thepurposeofthe3transformerrectifiersistoconvert115voltac,400Hz,3-phasepowerto28voltdcpowerforusebytheairplane’ssystems.ElectricalPowerACmotorDCmotorDifferencesbetweenAC&DCmotorsDCPowerSupplyElectricalPowerThepurposeofelectricalpowerdistributionsystemistoprovideandcontrolgeneratedacanddcpow

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