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1、UNIT15TEXT C Principle of Optimum Configuration SelectionPROFESSIONALENGLISHUNIT 15 TEXT C Principle of Optimum Configuration本次课学习内容UNIT 15 TEXT C Principle of Optimum Configuration Selection本次课学习目标l掌握Principle of Optimum Configuration Selection的英文专业词汇l训练快速阅读能力，提高阅读速度NEWWORDSconfiguration knfrenn.配置
2、配置;结构结构sensitivitysenstvtin.敏感;灵敏性PHRASES AND EXPRESSIONScruise speed巡航速度巡航速度gravitational acceleration重力加速度重力加速度windward area迎风面积迎风面积traction battery动力电池动力电池regenerative braking再生制动；反馈制动再生制动；反馈制动life cycle cost全寿命周期成本全寿命周期成本acquisition cost购置成本购置成本lThebasicapproachofoptimumconfigurationselectionisa
3、sfollows:obtainingthebasicparametersandbasicperformanceindexesofthevehicle,preliminarilyselectingseveralcommonly-appliedconfigurationsforfurtheroptimumselectionaccordingtotheapplicationconditions,andthenfinalizingthesatisfactoryconfigurationbasedontheoptimumconfigurationselectionmethod.Thebasicproce
4、ssofoptimumconfigurationselectionofhybridelectricvehiclesisshowninFig.15-2.Principle of Optimum Configuration Selection Principle of Optimum Configuration SelectionDesignmatchingdesignStartConfiguration1,Configuration2,Configuration.PreliminarymatchingLifecyclecostAcquisitioncostFuelcostMaintenancec
5、ostEngineeringofvariousconfigurationsDrivabilityStructuralDeterminationofoptimumEndFig.15-2 Process of optimum configuration selection of hybrid systemlProvidedthatthevehicleparametersandbasicperformanceindexesarethesame,subjectseveraltypicalhybridsystemconfigurationstopreliminarymatchingtoobtainthe
6、preliminarymatchingresultsofeachconfiguration.Then,basedonthepreliminarymatchingresultsandinconsiderationofthelifecyclecostandengineeringdifficultyofeachhybridsystemconfiguration,selecttheoptimumconfiguration.lPreliminary matching of configurationslThoughtheconfigurationsofhybridsystemaredifferentfr
7、omeachotherinstructureandlayout,theirmatchingapproachesarebasicallysimilar.Inmostcases,thematchingisperformedintheorderof“totalpowerenginepowerpower,speedandtorqueofmotorenergy,powerandcapacityoftractionbattery”basedonthepowertransmissioncharacteristicsandinternalenergyflowrelation.Principle of Opti
8、mum Configuration Selectionl Principle of Optimum Configuration Selectionl Principle of Optimum Configuration Selectionl Principle of Optimum Configuration Selectionl(3)Type selection of motorAstheapplicableworkingconditionsofmotorsindifferentconfigurationsaredifferent,theirmatchingprocessinvolvesce
9、rtaindifferences.FormotorsofparallelP2configuration,switchingseries-parallelconfigurationandplanetaryseries-parallelconfiguration,thespecificselectionrequirementsareasfollows.l1)Parallel P2 configurationlInthisconfiguration,themotorprovidesratedpowerduringpureelectricdrivingmode,andprovidesinstantan
10、eouspeakpowerwhendrivingresistanceincreasesorrapidaccelerationisrequired.Themaximumspeedofmotorshallmeetthelimitspeedrequirementofvehicle.Principle of Optimum Configuration Selectionl2)Switching series-parallel configurationlInthisconfiguration,astheengineisdisabledfromoperationwhenthevehiclespeedis
11、low,themainclutchmuststaydisengaged,andthemainmotorisrequiredtoworkfordrivingalone.Theauxiliarymotorismainlyforsupportingstartandstopoftheengine,andcanserveasanauxiliarydrivingsourcewhenahighertorque/powerisrequired.l3)Planetary series-parallel configurationlAplanetaryseries-parallelhybridsystemallo
12、wsfordecouplingofenginespeed,torqueandroadloadtocontroltheenginetofollowtheoptimalcurveasdesired,andthus,thetwomotorscanrealizesuchfunctionsasenginespeeddecouplingandtorquepeakshaving.Principle of Optimum Configuration Selectionl(4)Type selection of traction batterylAstheauxiliaryenergysourceofhybri
13、delectricvehicles,thetractionbatteryisrequiredtofastrespondtothepowerdemandfromthemotorduringdrivingtoprovidedrivingenergyorstoretheenergyrecoveredduringregenerativebraking.Therefore,thetractionbatteryshouldmeetthepowerrequirementsofthepowersystem,andshouldhavesufficientcapacitytomeettheall-electric
14、rangerequirementofthehybridelectricvehicles.lThepowerlevelofthetractionbatteryisrelatedtothemotor,i.e.theoutputpowerofthetractionbatteryshouldbesuchthatabalanceisrealizedbetweenthesystemcircuits,andthecharge/dischargecurrentofthetractionbatteryissomehowlimited,asanoverhighcharge/dischargecurrentwill
15、causetemperatureriseandtherebyshortentheservicelifeofthetractionbattery.Principle of Optimum Configuration SelectionlThecharge/dischargecurrentofthetractionbatteryisrelatedtoitscapacity,andthemaximumcurrentisgenerallylimitedto35C(Cisthecapacityofthetractionbattery).lTheenergyofthetractionbatterypack
16、ismainlytomeettherangeindexofthevehicle.Generally,theconstantvelocitymethodisusedtocalculatetherequiredenergyofatractionbattery,asshowninformula(15-5):Principle of Optimum Configuration Selectionl Principle of Optimum Configuration Selectionl Principle of Optimum Configuration Selectionl2.Comprehensive optimum configuration selectionlTheoptimumconfigurationselectionofhybridsystemisbasedonthematchingresultsandinconsiderationofthelifecyclecostandengineeringdifficultyofeachconfiguration.l(1)Life cy
