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1、火车的起源发展及现状英文物理演讲PPTThehistoryoftrainsFixedtractor牵引机+track铁轨steamlocomotive蒸汽机车1817Asteamlocomotiveisarailwaylocomotivethatproducesitspullingpowerthroughasteamengine.Theselocomotivesarefueledbyburningcombustiblematerial,usuallycoal,woodoroil,toproducesteaminaboiler,whichdrivesthesteamengine.steamloc
2、omotive蒸汽机车ThehistoryoftrainsFixedtractor牵引机+track铁轨steamlocomotive蒸汽机车18171879electriclocomotive电力机车electriclocomotive电力机车Anelectriclocomotiveisalocomotivepoweredbyelectricityfromoverheadlines,athirdrailoron-boardenergystoragesuchasabatteryorfuelcell.ThehistoryoftrainsFixedtractor牵引机+track铁轨steamlo
3、comotive蒸汽机车18171879electriclocomotive电力机车1984diesellocomotive内燃机车diesellocomotive内燃机车Adiesellocomotiveisatypeofrailwaylocomotiveinwhichtheprimemoverisadieselengine.Severaltypesofdiesellocomotivehavebeendeveloped,differingmainlyinthemeansbywhichmechanicalpowerisconveyedtothedrivingwheels.Thehistoryo
4、ftrainsFixedtractor牵引机+track铁轨steamlocomotive蒸汽机车18171879electriclocomotive电力机车1984diesellocomotive内燃机车In21stCentury10maglevtrain磁悬浮列车Maglev磁悬浮列车Maglevisamethodofpropulsionthatusesmagneticlevitationtopropelvehicleswithmagnetsratherthanwithwheels,axlesandbearings.Withmaglev,avehicleislevitatedashortd
5、istanceawayfromaguidewayusingmagnetstocreatebothliftandthrust.The history of trainTheprincipleofmaglevtrainsA suppose of future transportationMaglevsuspensionsystem悬浮系统propulsionsystem推进系统guidancesystem导向系统ElectrodynamicSuspension(EDS)电动悬浮Electromagneticsuspension(EMS)电磁悬浮Boththeguidewayandthetraine
6、xertamagneticfield,andthetrainislevitatedbytherepulsiveandattractiveforcebetweenthesemagneticfields.Insomeconfigurations,thetraincanbelevitatedonlybyrepulsiveforce.ElectrodynamicSuspension(EDS)Thetrainlevitatesaboveasteelrailwhileelectromagnets,attachedtothetrain,areorientedtowardtherailfrombelow.El
7、ectromagneticsuspension(EMS)Maglevsuspensionsystem悬浮系统propulsionsystem推进系统guidancesystem导向系统ElectrodynamicSuspension(EDS)电动悬浮Electromagneticsuspension(EMS)电磁悬浮SomeEMSsystemscanprovidebothlevitationandpropulsionusinganonboardlinearmotor.EDSsystemsandsomeEMSsystemscanonlylevitatethetrainusingthemagnet
8、sonboard,notpropelitforward.propulsionsystem推进系统Maglevsuspensionsystem悬浮系统propulsionsystem推进系统guidancesystem导向系统ElectrodynamicSuspension(EDS)电动悬浮Electromagneticsuspension(EMS)电磁悬浮guidancesystem导向系统SomesystemsuseNullCurrentsystems,theseuseacoilwhichiswoundsothatitenterstwoopposing,alternatingfields,s
9、othattheaveragefluxintheloopiszero.Whenthevehicleisinthestraightaheadposition,nocurrentflows,butifitmovesoff-linethiscreatesachangingfluxthatgeneratesafieldthatnaturallypushesandpullsitbackintoline.The history of trainTheprincipleofmaglevtrainsA suppose of future transportationAtleast6monthago,hecam
10、eupwiththisideahttp:/ days ago,scientists in China accomplished HTSMaglevcirculartracktest.载人高温超导磁悬浮环形轨道测试If there is no body on the train,the speed of the train can reach 2500km/h http:/ picture is from http:/ are from http:/en.wikipedia.org/wikilWritten texts are from http:/en.wikipedia.org/wiki/S
11、team_locomotive http:/en.wikipedia.org/wiki/Electric_locomotive http:/en.wikipedia.org/wiki/Diesel_locomotive http:/en.wikipedia.org/wiki/MaglevlVideo is from http:/ is from http:/ history of trainTheprincipleofmaglevtrainsA suppose of future transportationThehistoryoftrainsFixedtractor牵引机+track铁轨steamlocomotive蒸汽机车18171879electriclocomotive电力机车1984diesellocomotive内燃机车In21stCentury10maglevtrain磁悬浮列车Maglevsuspensionsystem悬浮系统propulsionsystem推进系统guidancesystem导向系统ElectrodynamicSuspension(EDS)电动悬浮Electromagneticsuspension(EMS)电磁悬浮Thankyou!此课件下载可自行编辑修改，仅供参考！感谢您的支持，我们努力做得更好！谢谢