磁悬浮列车牵引系统

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1、磁悬浮列车牵引系统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