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1、磁懸浮列車牽引系統(tǒng)MaglevTractionSystem2ContentOverviewofMaglevFundamentalsTractionsystemandsubsystemsShanghaiMaglev3BackgroundChangesIncreaseofpopulationUrbanizationQualityoflifeProblemsofAirservicesAutomobilesConventionaltrains4MaglevMagneticlevitationtrainLevitatedandpropelledusinge
2、lectromagnetismGuidewayArmElevatedtrack5HistoryFirstpatentbyHermannKemperofGermanyin1934Quickeningperiodofthe1960sMaturityofthe1970s–1980sTestperiodofthe1990sPracticalpublicservicein2003MainresearchdonebyGermanyandJapan6ComparisonMaglevWheel-on-RailNoise60~65[dB]75~80[dB]Safe
3、tyNoderailmentandslippingDerailsfromaminordefectMaintenanceVerylittlePeriodicGrade80~100/100030~50/1000Curve30[m]inradius150[m]inradiusOperatingspeedUpto500km/hBelow300km/h7CharacteristicsNotsuitableforfreightLesssusceptibleforicyconditionsEnvironmentfriendlyGoodaccelerationa
4、nddecelerationDifficultforswitchingorbranchingoffExpensiveforconstructionDangerouswhenelectricitysupplyisinterrupted8ContentOverviewofMaglevFundamentalsTractionsystemandsubsystemsShanghaiMaglev9MagnetismMagnetismarisesfrommovingchargesMeasurementMagneticinductionIineMagneticf
5、luxdensityMagneticflux10Electromagnetism(I)Right-handscrewrule(Ampere'srule)11Electromagnetism(II)Faraday'slawofinductionLenz’slawAninducedelectromotiveforce(EMF)alwaysgivesrisetoacurrentwhosemagneticfieldopposestheoriginalchangeinmagneticflux12Electromagnetism(III)Right-hand
6、ruleLeft-handrule13ElectricalengineeringFunctionTypicalCircuitRectifierAC->DCBridgerectifierInverterDC->ACPWMinverterChopperDC->DCBuck/boostcircuitTransformerAC->AC-VFDAC->ACRectifier+Filter+Inverter14ContentOverviewofMaglevFundamentalsTractionsystemandsubsystemsShanghaiMagle
7、v15SubsystemsLevitationGuidancePropulsionBrakingEnergysupply16EDSElectrodynamicsuspensionCharacteristicsMagneticrepulsiveforceAirgapabout100mmSuitableforhigh-speedoperationCannotlevitatebelow100km/hNeedrubbertires17OnetypeClassificationPermanentMagnet(PM)SuperconductingMagnet
8、(SCM)18Anothertype19EMSElectromagneticsuspensionCharacteristicsMagne
