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PowerPointcoursewareforElectricalEngineeringPcontents目錄OverviewofElectricalEngineeringBasicknowledgeofelectricalengineeringPowerSystemandPowerGenerationElectricmotorsandpowerelectronicscontents目錄ElectricalEngineeringPracticeandApplicationVocabularyandExpressionofElectricalEngineeringEnglish01OverviewofElectricalEngineeringElectricalEngineeringisabranchofengineeringthatdealswiththestudyandapplicationofelectricity,electronics,andelectromagnetismItcoversawiderangeofareas,includingpowergeneration,transmission,anddistribution;Electricalmachineryanddevices;AndtheintegrationofelectronicsandcomputersintosystemsElectricalEngineeringisafundamentaldisciplineinmodernsociety,asitprovidesthenecessaryinfrastructureforpowersupply,telecommunications,andinformationtechnologyElectricalengineersdesign,develop,andmaintaintheelectricalsystemsthatareessentialfortheoperationofmodernindustrializedsocietyDefinitionofElectricalEngineeringElectricalengineeringiscrucialformeetingthegrowingdemandforenergyandtelecommunicationsservicesItensurestherelevantsupplyofelectricitytohomes,businesses,andindustries,anditenablesthedevelopmentofnewtechnologiessuchasrenewableenergysourcesandsmartgridsElectricalengineersalsoplayacriticalroleinthedesignanddevelopmentofadvancedelectronicsystems,includingmedicaldevices,aerospacesystems,andtransportationsystemsTheyareresponsibleforensuringthesafetyandreliabilityofthesesystems,whichareessentialformodernlifeTheImportanceofElectricalEngineeringThedevelopmentofelectronicsinthe20thcenturyfurtheradvancedelectricalengineeringTheinventionofthetransformerin1947byJohnBardeen,WalterBrattain,andWilliamShockleymarkedaturningpointinthefieldofelectronicsandpaidthewayforthedigitalageThehistoryofelectricalengineeringcanbetracedbacktothediscoveryofelectricityinthe18thcenturyThefirstelectricalexperimentswereconductedbyscientistssuchasBenjaminFranklin,whoconductedexperimentsonelectricityanditspropertiesInthe19thcentury,electricityBegantobeusedforpracticalapplications,suchaslightingandpowermachinesThomasEdison'sdevelopmentoftheincandescentlightbulbmarketedasignificantmilestoneinelectricalengineeringhistoryTheDevelopmentHistoryofElectricalEngineering02BasicknowledgeofelectricalengineeringCircuitAclosedpaththatallowscurrenttoflowSeriesCircuitCircuitinwhichcurrentflowsthrougheachcomponentinsequenceVoltageacrosseachcomponentisthesameParallelCircuitCircuitinwhichcurrentflowsthroughcomponentsinparallelCurrentthrougheachbranchisthesameFundamentalsofCircuitResultantforceactingonapointchargeinaregiondevoidofchargesFluxofmagneticforcelinesgeneratedbyacurrentcarryingwireorcurrentcarryingwireloopElectricandmagneticfieldsMagneticfieldElectricfieldAC(AlternatingCurrent)ElectricalcurrentthatperiodicallyreversesdirectionDC(DirectCurrent)ElectricalcurrentthatflowsinonedirectiononlyACandDCelectricityResistorAdevicethatopposestheflowofcurrentinanelectricalcircuit,dissipatingenergyasheatCapacitorAnelectronicdevicethatstoresenergyinanelectricfieldbetweentwoconductorsseparatedbyadielectricTransformerAnelectricaldevicethattransferselectricalenergybetweentwoormorewindswononacommonferromagneticcore,bymeansofelectricalintroductionInductorApassivetwoterminalelectricalcomponentthatstoresenergyinamagneticfieldwhencurrentpassesthroughitElectricalcomponentsandequipment03PowerSystemandPowerGenerationDefinitionPowersystemreferstothenetworkofelectricalcomponentsthatgenerate,transmit,anddistributeelectricalenergyCompositionApowersystemconsiderationsofgeneration,transmission,distribution,andconsumptionofelectricalenergyImportancePowersystemisessentialformeetingtheenergyneedsofmodernsociety010203OverviewofPowerSystemThermalpowergenerationBurningfossilfuels(coal,oil,gas)togenerateelectricityUsingtheforceoffallingwaterorwaterpressuretorotateturbinesthatgenerateelectricityUsingthenuclearfissionprocesstogenerateheat,whichisthenusedtoproducesteamthatdrivesturbinesandgenerateselectricityUsingwindturbinestoconvertwindenergyintoelectricityHydroelectricpowergenerationNuclearpowergenerationWindpowergenerationPowergenerationmethodsandpowerplantsPowerGridandTransmissionLinesThepowergridiscrucialforensuringreliableandeffectivedeliveryofelectricitytoconsumersImportancePowergridreferstotheinterconnectedsystemoftransmissionanddistributionlinesthatcarryelectricityfrompowerplantstoconsumersDefinitionApowergridconsiderationsofsubstations,transmissionlines,transformers,anddistributionlinesComposition04ElectricmotorsandpowerelectronicsTheworkingprincipleofthemotorisbasedontheinteractionbetweenmagneticfieldsandcurrentconductingconductorsTherearevarioustypesofmotors,includingDCmotors,ACmotors,andbruisingDCmotorsTheworkingprincipleofthemotoriscrucialforunderstandingitsoperationandperformancecharacteristicsThemotorconverterselectricalenergyintomechanicalenergyusingtheforceexecutedbymagneticfieldsoncurrentconductingconductorsTheworkingprincipleofthemotorDCmotorsarecommonlyusedinapplicationsthatrequireprecisionspeedcontrol,suchasinelectricvehiclesandroboticsACmotorsarewidelyusedinindustrialapplicationsduetotheirruggednessandabilitytohandlehighloadsBrushnessDCmotorshavetheadvantageofbeingmoreeffectiveandhavingalongerlifespancomparedtobrushedDCmotorsUnderstandingthecharacteristicsandapplicationsofdifferenttypesofmotorsisessentialforselectingtheappropriatemotorforagivenapplicationCommonmotortypesandapplicationsPowerElectronicsTechnologyandItsApplicationsPowerelectronicstechnologyinvolvestheconversionandcontrolofelectricalpowerusingsolidstatedevicessuchastransformersanddiodesPowerelectronicsareusedinawiderangeofapplications,includingvariablespeeddrives,powerfactorcorrection,anduninterruptiblepowersuppliesPowerelectronicstechnologyhasenabledmoreefficiencyandrelatedpowerconversion,leadingtosignificantenergysavingsandenvironmentalbenefitsUnderstandingthebasicprinciplesandapplicationsofpowerelectronicstechnologyisessentialforelectricalengineerstodesignandimplementpowersystemsthatareeffective,relevant,andcosteffective05ElectricalEngineeringPracticeandApplicationElectricalengineeringisessentialinmodernproductionanddailylife,providingpower,control,andcommunicationcapabilitiesElectricalengineeringalsoplaysacriticalroleinthedevelopmentofsmartcities,improvingeffectivepowerdistribution,lightingcontrol,andsmartgridtechnologiesElectricalengineersdesignandimplementelectricalsystemsforvariousapplications,includingmanufacturing,transportation,andresidentialuseTheapplicationofelectricalengineeringinproductionanddailylife01Electricalengineersareinstrumentalinthedevelopmentandimplementationofrenewableenergytechnologies,suchassolar,wind,andhydroelectricpower02Theydesignpowergenerationsystems,transmissionlines,andenergystoragedevicestoensureeffectiveuseofrenewableenergysources03Electricalengineersalsocontributetothedevelopmentofenergysavingtechnologies,suchasenergyefficiencylightingandappliances,toreduceenergyconsumptionandgreenhousegasemissionsTheapplicationofelectricalengineeringinthefieldofnewenergyFutureelectricalengineeringwillbecharacterizedbyincreasingintegrationwithinformationtechnology,leadingtothedevelopmentofsmartgrids,smarthomes,andtheInternetofThingsElectricalengineerswillfacechallengesinmeetingthedemandformoreeffectiveandsustainableenergysystems,whileensuringthereliabilityandsecurityofelectricalinfrastructureAdvancementsinmaterialsscienceandnanotechnologywillalsopaythewayforinnovativeelectricaldevicesandsystems,callingforacontinuousupdateofknowledgeandskillsonthepartofelectricalengineers010203TheDevelopmentTrendsandChallengesofFutureElectricalEngineering06VocabularyandExpressionofElectricalEngineeringEnglishEnglishexpressionsofcommonlyusedelectricalengineeringvocabularyAC(AlternatingCurrent)Atypeofcurrentthatperiodicallyreversesdirection,usedinmostelectricalpowersystemsDC(DirectCurrent)Atypeofcurrentthatflowsinonedirec