汽车专业实用英语 教学课件 作者 陈晟闽 08-charging system.ppt

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1、WelcomeToChargingSystemOperation&DiagnosisSECTION8ObjectivesExplainthepurposeofthechargingsystem.Identifythemajorcomponentsofthechargingsystem.ExplainthepurposeofthemajorpartsofanACgenerator.Explainhalf-andfull-waverectificationandhowtheyrelatetoACgeneratoroperation.continued…Obje

2、ctivesIdentifythedifferenttypesofACvoltageregulators.Describethetwotypesofstatorwindings.Explainwhatfeaturesareenabledbytheuseofastarter/generatorunit.Performchargingsysteminspectionandtestingproceduresusingelectricaltestequipment.continued…ThePurposeoftheChargingSystemThecharging

3、systemsmainpurposeistorechargethebatteryafterstartingtheengine.Afterthebatteryhassuppliedthehighcurrentneededtostarttheengine,evenagoodbattery,hasalowcharge.Thechargingsystemsuppliesaconstantandrelativelylowchargetothebattery.Thechargingsystemmustalsoreacttosupplycurrenttothechang

4、ingdemandsoftheelectricalaccessories.continued…ACGeneratorComponentsRotorCreatestherotatingmagneticfield.BrushesProvideameansofconnectingthestatortothemovingrotor.StatorIsthecoilinwhichelectricityisproduced.continued…ACGeneratorComponentsRectifierbridgeConvertsalternatingcurrentto

5、directcurrent.HousingContainsthealternatorcomponentsandsupportstherotor.CoolingfanKeepstheinternalcomponentscool.continued…ACGeneratorComponentscontinued…Atypicalchargingsystem点火开关起动机蓄电池驱动皮带发电机转子绕组定子绕组皮带轮转子轴轴承散热风扇磁极轴承滑环电刷电刷支架Cutawayviewofagenerator磁极磁轭滑环碳刷Atypicalgeneratorrotorass

6、embly定子绕组定子架交流输出A端子交流输出B端子交流输出C端子Atypicalstatorassembly整流桥蓄电池定子Statorconnectedtorectifierbridge欧姆计（检查接地）欧姆计（检查断路）TestingRotor欧姆计（检查断路和短路）欧姆计（检查断路）欧姆计（检查短路）TestingStatorStatorWindingDesignsWyewoundconnectionOneleadfromeachwindingisconnectedinonecommonplace.Isusuallyfoundinapplicati

7、onsthatdonotrequirehighamperageoutput.continued…StatorWindingDesignsDeltawoundconnectionAttachestheleadofoneendofthewindingtotheleadattheotherendofthenextwinding.Iscommonlyusedinapplicationsthatrequirehighamperageoutput.Isusuallysmallerthanwyewounddesigns.continued…Half-waveRectif

8、icationACgeneratorsproducealterna