《車用驅(qū)動(dòng)電機(jī)原理與控制基礎(chǔ) 第2版》 課件英文 Chapter 2 Magnetic Field and Magnetic Circuit

車用驅(qū)動(dòng)電機(jī)原理與控制基礎(chǔ)(第2版)PrincipleandControlFundamentalsofVehicleDriveMotorsChapter2

Magnetic

FieldandMagneticCircuit22.1TheGenerationandQuantificationofMagneticField2.1.1TheMagneticFieldanditsQuantification

32.1.1TheMagneticFieldanditsQuantification

Fig.2-2themagneticfluxthroughthecurvesurface42.1.2TheMagneticEffectofCurrentFig.2-3Themagneticfieldproducedbyanelementofcurrent(Biot-SavartLaw)

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Fig.2-4Thearbitraryclosedlooppathforanelectriccurrent2.1.2TheMagneticEffectofCurrent

62.1.2TheMagneticEffectofCurrent

72.1.3Electromagneticforce(orLorentzforce)

Fig.2-6AparticleofchargeinamagneticfieldFig.2-7Aconductorinamagneticfield8

2.2ElectromagneticInduction9

Fig.2-9Motionalelectromotiveforce2.2ElectromagneticInduction10

2.2ElectromagneticInduction112.2Electromagneticinduction

122.3MagneticMedium

132.3MagneticMedium

Fig.2-2Ampère'scircuitallaw142.3MagneticMedium

Fig.2-14hysteresisloop

152.3MagneticMediumFig.2-5Hysteresisloopsofdifferentmagneticmediuma）softmagneticmaterialb）hardmagneticmaterialc）

ferritematerialofrectangularloop

162.3MagneticMedium

Fig.2-16Magneticenergyincables172.4MagneticCircuit,BasicLawsofMagneticCircuit2.4.1BasicLawsofMagneticCircuit

Fig.2-17Magneticcircuitofatransformer182.4.1BasicLawsofMagneticCircuitFig.2-18Non-branchedironcoremagneticcircuit

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2.4.1BasicLawsofMagneticCircuit202.4.2ParallelandSeriesConnectionsofMagneticCircuits

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2.4.2ParallelandSeriesConnectionsofMagneticCircuits222.4.2ParallelandSeriesConnectionsofMagneticCircuits

232.5TypicalDCMagneticCircuitFig.2-23Theironcoreofdoublecoilexcitationanditsequivalentcircuitdiagram

242.5.1Doublecoilexcitation,fluxlinkage2.5.1DoubleCoilExcitation,FluxLinkage

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2.5.1DoubleCoilExcitation,FluxLinkage26

2.5.1DoubleCoilExcitation,FluxLinkage272.5.2CalculationFeaturesofPermanentMagneticCircuitFig.2-24PermanentMagnetMagneticCircuitwithanAirGap

282.5.2CalculationFeaturesofPermanentMagneticCircuitFig.2-25Demagnetizationcurveofpermanentmagnet

292.5.2CalculationFeaturesofPermanentMagneticCircuitFig.2-26Determinationofpermanentmagnetoperatingpoint

Duetothefactthatthedemagnetizationcurveofapermanentmagnetisnotnecessarilyastraightline,andadditionally,themagneticcircuitmayalsocontainnonlinearironcoresegments,thisbecomesanonlinearproblem.Therefore,itisconvenienttosolveitusinggraphicalmethods.302.5.2CalculationFeaturesofPermanentMagn