軌道交通車輛專業(yè)英語課件：Composition of CRH380B-EMU Electric Traction System

CompositionofCRH380B-EMUElectricTractionSystemRailwayVehicleEnglishPart1：ReadingMaterialRailwayVehicleEnglishPart1:ReadingMaterial

Multipleunittrains,referredasEMU,areformedinto"units"or"sets"oftwoormorecars.Theyareoftensemi-permanentlycoupledtogether,onlybeinguncoupledinsideaworkshopforheavymaintenance.Thefacilityfortheelectrictractionsystemtobespreadoutalongthetrain,comparedwithcrammingitalltogetherintoabulkylocomotive,allowedanumberofsmallpowerunitstobedistributedunderneaththefloorsofseveralvehiclesinthetrain.TheelectrictractionsystemoftheEMUincludesthepowersupplypartandthetractiontransmissionpartoftheEMUitself.Thepowersupplypartreferstothemaincircuitfromthesubstationtothepantograph,whilethe

transmissionpartoftheEMUitselfreferstothemaincircuit

fromthepantograph,tractiontransformer,tractionconvertertothetractionmotor.Part1:ReadingMaterial

Fig.4-3showsthecircuitdiagramoftractionsystemofonepowerunitofCRH380BEMU.ThepantographontheroofofTC02coachreceivesAC25kVfromOCS,andthentransmitstheelectricenergytothetractiontransformerinstalledunderTC02coachthroughthehigh-voltagecablearrangedontheroofandvehicleend.Thesecondarysideofthetransformerinducesavoltageof4×1850Vandsendsittotheconverterunitunderthemotorvehiclethroughtheconnectingfeederbetweencoaches.Pan—pantograph;CT—contactpowergrid;TF—transformer;TC—tractionconverter;Tm—tractionmotor.Part1:ReadingMaterial

PantographisacomponentthatobtainselectricenergyfromOCS,asshowninFig.4-4.Sincethehigh-voltagelineisconnectedtotwotractionunitsofCRH380BEMU,onlyonepantographneedstoberaisedinnormaloperation,andthepantographisdrivenbycompressedair.CXpantographisselectedforCRH380BEMU,mainlyincludinganinsulator,underframe,shockabsorber,APIMdevice,ADDdevice,upperandlowerarms,upperandlowerguiderods,bowhead,carboncontactstrip,etc.Part1:ReadingMaterial

TheshapeofCRH380BEMUtractiontransformerisshowninFig.4-5.Itisasingle-phasetransformerwithratedvoltageofAC25kV.ThetransformerconvertstheOCSAC25kVontheprimarywindingintothevoltageoffoursecondarywindingsandsuppliespowertothetractionconverter.Thetransformermainlyincludesironcore,winding,insulatingsleeve,oiltank,oilpump,oilcooler,electricforceddraftfanandotherparts.Theoilpump,oilcoolerandelectricforceddraftfanconstitutetheoilcirculatingaircoolingsystemofthetransformer.Part1:ReadingMaterial

CRH380BEMUhasfourtractionconverterssuspendedonthevehiclefloor.Thefunctionofthetractionconverteristoconverttheelectricalsystemtomeettheneedsofthetractiontrainandtractioncontrolfortheformofelectricalenergy.Eachtractionconverterhastwogroupsoffour-quadrantchopper(4QC)modules,onePWMinvertermodule,onegroupoftractioncontrolunit,coolingsystemandintermediateDClink.Eachgroupofinvertercontrolsfourtractionmotors.Themainfunctionoftheconverteristoobtain3200~3600VintermediateDCvoltagefromtheAC1850V/50Hzoutputbythetractiontransformerthroughfour-quadrantrectifier,andthensupplypowertothetractionmotorthroughtheinverteroutputvoltageandthree-phaseACvoltagewithadjustablefrequency.Part1:ReadingMaterialTheoutlineofthetractionconverterisshowninFig.4-6.

CRH380BEMUisequippedwith16tractionmotors,whicharethree-phasefourstageasynchronoustractionmotors.Thetractionmotorsareinstalledonthebogie,andeachwheelsetofthepowerbogieisdrivenbythetractionmotor.Themotorisathree-phasefourpoleasynchronoustractionmotor,whichiscomposedofrotor,stator,casingandaccessories.Thestatoriscomposedofstatorcoreandstatorwinding,whichismainlyusedforgeneratingcircularmagneticfield.Part1:ReadingMaterialTherotoriscomposedofrotorcoreandrotorwinding,whichismainlyusedtoconvertelectricenergyintotractionenergyanddrivethewheelsettorotate.

Thereareninekeytechnologiesofhigh-speedEMU,includinglightweightcarbody,high-speedbogie,brakingsystem,systemintegration,tractioncontrolsystem,tractionconverter,tractiontransformer,tractionmotor,trainnetworkcontrolsystem,etc.ItcanbeseenthatthecompositionandcontrolofEMUtractionsystemplaysanimportantroleinthedevelopmentofEMUtechnology.RailwayVehicleEnglishPart2：VocabularyPart2:Vocabularyfrequency頻率insulatingsleeve絕緣套管insulator絕緣子rectifier整流器shockabsorber阻尼器inverter逆變器carboncontactstrip碳滑板rotor轉(zhuǎn)子ratedvoltage額定電壓stator定子winding繞組magneticfield磁場Part3:CommentariesforLongDifficultSentencesRailwayVehicleEnglishPart3:CommentariesforLongDifficultSentences123

Thepowersupplypartreferstothemaincircuitfromthesubstationtothepantograph,whilethetransmissionpartoftheEMUitselfreferstothemaincircuitfromthepantograph,tractiontransformer,tractionconvertertothetractionmotor.供電部分指的是從變電站到受電弓，而動車組自身的傳動部分指的是從受電弓、牽引變壓器、牽引變流器到牽引電機的主電路部分涉及的內(nèi)容。

ThetransformerconvertstheOCSAC25kVontheprimarywindingintothevoltageoffoursecondarywindingsandsuppliespowertothetractionconverter.變壓器將一次繞組上的接觸網(wǎng)AC25kV轉(zhuǎn)換為四個二次繞組的電壓,并給牽引變流器供電。

Thetractionmotorsareinstalledonthebogie,andeachwheelsetofthepowerbogieisdrivenbythetractionmotor.牽引電動機安裝在轉(zhuǎn)向架上，動力轉(zhuǎn)向架的每個輪對都由牽引電動機驅(qū)動。RailwayVehicleEnglishPart4:ExerciseandActivityPart4:ExerciseandActivity1.Directions:canyoutellwhichofthefollowingitemsarethecomponentsofpantograph,transformer，converter，tractionmotor？Trytoclassifythem.Underframe,Upperarm,lowerpullrod,up