磁悬浮列车牵引系统.ppt

磁悬浮列车牵引系统MaglevTractionSystem

2ContentOverviewofMaglevFundamentalsTractionsystemandsubsystemsShanghaiMaglev

3BackgroundChangesIncreaseofpopulationUrbanizationQualityoflifeProblemsofAirservicesAutomobilesConventionaltrains

4MaglevMagneticlevitationtrainLevitatedandpropelledusingelectromagnetismGuidewayArmElevatedtrack

5HistoryFirstpatentbyHermannKemperofGermanyin1934Quickeningperiodofthe1960sMaturityofthe1970s–1980sTestperiodofthe1990sPracticalpublicservicein2003MainresearchdonebyGermanyandJapan

6ComparisonMaglevWheel-on-RailNoise60~65[dB]75~80[dB]SafetyNoderailmentandslippingDerailsfromaminordefectMaintenanceVerylittlePeriodicGrade80~100/100030~50/1000Curve30[m]inradius150[m]inradiusOperatingspeedUpto500km/hBelow300km/h

7CharacteristicsNotsuitableforfreightLesssusceptibleforicyconditionsEnvironmentfriendlyGoodaccelerationanddecelerationDifficultforswitchingorbranchingoffExpensiveforconstructionDangerouswhenelectricitysupplyisinterrupted

8ContentOverviewofMaglevFundamentalsTractionsystemandsubsystemsShanghaiMaglev

9MagnetismMagnetismarisesfrommovingchargesMeasurementMagneticinductionIineMagneticfluxdensityMagneticflux

10Electromagnetism(I)Right-handscrewrule(Amperesrule)

11Electromagnetism(II)FaradayslawofinductionLenz’slawAninducedelectromotiveforce(EMF)alwaysgivesrisetoacurrentwhosemagneticfieldopposestheoriginalchangeinmagneticflux

12Electromagnetism(III)Right-handruleLeft-handrule

13ElectricalengineeringFunctionTypicalCircuitRectifierAC-DCBridgerectifierInverterDC-ACPWMinverterChopperDC-DCBuck/boostcircuitTransformerAC-AC-VFDAC-ACRectifier+Filter+Inverter

14ContentOverviewofMaglevFundamentalsTractionsystemandsubsystemsShanghaiMaglev

15SubsystemsLevitationGuidancePropulsionBrakingEnergysupply

16EDSElectrodynamicsuspensionCharacteristicsMagneticrepulsiveforceAirgapabout100m