磁悬浮列车牵引系统课件

1、磁悬浮列车牵引系统磁悬浮列车牵引系统2ContentOverview of MaglevFundamentalsTraction system and subsystemsShanghai Maglev4ContentOverview of Maglev3BackgroundChangesIncrease of populationUrbanizationQuality of lifeProblems ofAir servicesAutomobilesConventional trains5BackgroundChanges4MaglevMagnetic levitation trainLev

2、itated and propelled using electromagnetismGuidewayArmElevated track6MaglevMagnetic levitation tra5HistoryFirst patent by Hermann Kemper of Germany in 1934Quickening period of the 1960sMaturity of the 1970s 1980sTest period of the 1990sPractical public service in 2003Main research done by Germany an

3、d Japan7HistoryFirst patent by Herman6ComparisonMaglevWheel-on-RailNoise60 65 dB75 80 dBSafetyNo derailment and slippingDerails from a minor defectMaintenanceVery littlePeriodicGrade80100/10003050/1000Curve30 m in radius150 m in radiusOperating speedUp to 500 km/hBelow 300 km/h8ComparisonMaglevWheel

4、-on-Rail7CharacteristicsNot suitable for freightLess susceptible for icy conditionsEnvironment friendlyGood acceleration and decelerationDifficult for switching or branching offExpensive for constructionDangerous when electricity supply is interrupted9CharacteristicsNot suitable f8ContentOverview of

5、 MaglevFundamentalsTraction system and subsystemsShanghai Maglev10ContentOverview of Maglev9MagnetismMagnetism arises from moving chargesMeasurementMagnetic induction IineMagnetic flux densityMagnetic flux11MagnetismMagnetism arises fr10Electromagnetism (I)Right-hand screw rule (Amperes rule)12Elect

6、romagnetism (I)Right-ha11Electromagnetism (II)Faradays law of inductionLenzs lawAn induced electromotive force (EMF) always gives rise to a current whose magnetic field opposes the original change in magnetic flux13Electromagnetism (II)Faraday12Electromagnetism (III)Right-hand ruleLeft-hand rule14El

7、ectromagnetism (III)Right-13Electrical engineeringFunctionTypical CircuitRectifierAC - DCBridge rectifierInverterDC - ACPWM inverterChopperDC - DCBuck/boost circuitTransformerAC - AC -VFDAC - ACRectifier + Filter + Inverter15Electrical engineeringFuncti14ContentOverview of MaglevFundamentalsTraction

8、 system and subsystemsShanghai Maglev16ContentOverview of Maglev15SubsystemsLevitationGuidancePropulsionBrakingEnergy supply17SubsystemsLevitation16EDSElectrodynamic suspensionCharacteristicsMagnetic repulsive forceAir gap about 100 mmSuitable for high-speed operationCannot levitate below 100 km/hNe

9、ed rubber tires18EDSElectrodynamic suspension17One typeClassificationPermanent Magnet (PM)Superconducting Magnet (SCM)19One typeClassification18Another type20Another type19EMSElectromagnetic suspensionCharacteristicsMagnetic attraction forceAir gap about 10 mmNeed precise controlEasier than EDS tech

10、nicallyCan levitate in zero or low speeds (backup battery)Coils on the guideway21EMSElectromagnetic suspensio20ClassificationIntegrated typeSeparated type22ClassificationIntegrated typ21DevelopmentUse superconducting magnet instead of conventional electromagnetPermanent magnets are partly used with

11、electromagnets23DevelopmentUse superconducti22GuidanceMechanical guide wheelZero magnetic flux guidanceMagnetic forceRepulsive forceAttraction force24GuidanceMechanical guide whe23Magnetic forceAttraction forceRepulsive force25Magnetic forceAttraction for24PropulsionMagnetic forceLinear motor26Propu

12、lsionMagnetic force25AC asynchronous motor27AC asynchronous motor26AC synchronous motor28AC synchronous motor27Linear motor29Linear motor28LIMLinear induction motor30LIMLinear induction motor29LP / SPLong Primary / Short Primary31LP / SPLong Primary / Short 30LSMLinear synchronous motor32LSMLinear s

13、ynchronous motor31ClassificationField locationLong PrimaryShort PrimaryMagnetic fieldPermanent MagnetElectromagnet with iron-coreSuperconducting magnet with air-core33ClassificationField location32BrakingMethodSwap the poles of electromagnetSwap the phase sequence of primary wire loopsStrategyDecrea

14、se the number of railway stationsRegenerative braking and eddy current braking as primary brakingOil braking as secondary braking34BrakingMethod33Hybrid brakingAbove a certain speed (usually 520 km/h)Regenerative brakingEddy current brakingBelow a certain speedOil brakingHigh-friction skids (backup)

15、35Hybrid brakingAbove a certai34Energy Collection On-board batteries: insufficientElectric power supply from ground side to supportLevitationPropulsionOn-board electrical equipmentBattery recharging36Energy Collection On-board b35ClassificationLow-medium speed operationMechanical contact such as a p

16、antographSP type maglev used in this situationHigh speed operationLinear generator37ClassificationLow-medium spe36Linear generator38Linear generator37Energy infrastructureTransformerRectifierFilterInverterLoadTransformer39Energy infrastructureTransfo38ContentOverview of MaglevFundamentalsTraction sy

17、stem and subsystemsShanghai Maglev40ContentOverview of MaglevOverviewShanghai maglevTransit typeMagnetic levitationBegan operationJanuary 1, 2004Number of lines1Number of stations2Length30.5 kmMax operational speed431 km/h OverviewShanghai maglevTransitTechnologyShanghai maglevLevitationEMSPropulsionLP-LSMGuidanceMagnetic repulsive forceAir gapAbout 10 mmPrimary brakingTrack eddy current brake ( 5 km/h)Secondary brakingRegenerating brake ( 5 km/h)Oil brake ( 5 km/h)High-friction skids TechnologyShanghai maglevLevitElectric power s