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1、重庆大学硕士学位论文II英文摘要ABSTRACTWiththeshortageofnon-renewableenergyandautomobileexhaustemissionsarepollutingtheair,theelectricalvehicledevelopmentrapidlywhichhastheadvantageofenergy-efficientandenvironmentallyfriendly.However,theincreaseofelectronicequipmentandimprovement
2、ofelectricalintegrationdegreeinautomobile，whichmaketheelectromagneticcompatibilityproblemsofelectricalvehiclebecomemoreserious.Asoneofthemaininterferencesinvehicle,themotordrivesystemiscausingelectromagneticdisturbancewhileworking,especiallythecommon-modeinterferen
3、ce.Notonlyitaffectstheregularworkofitsownsystem,butalsodisturbtheoperationofanyotherunits.Theconductedelectromagneticinterferenceofmotordrivesysteminelectricalvehicleisstudied,themaincontentsareasfollows:1、TheSVPWMoperatingprincipleofmotordrivesystemisstudied,theme
4、chanismofproducingofelectromagneticinterferenceinDC/ACinverterisresearched,andtheconductedEMIpropagationpathsarediscussed.2、Amodelingmethodofmotorequivalentcircuitisproposed.Byregardingthethree-phaseacelectromotorasathree-portnetworkwithacommonend,thepi-typeequival
5、entcircuitisestablished.Theimpedanceparametersofmotorportsaremeasuredandconvertedtoadmittanceparameters,thenrationalfunctionsofadmittancecomponentsareobtainedbyusingvectorfittingmethod.TherationalfunctionscanberealizedwithRLClumped-element,sotheequivalentcircuitofm
6、otorisestablishedinconductedinterferencespectrum.3、Bycombiningwithdynamometer,theexperimentalplatformisbuilt,aimedtoobtaintheEMIdatawhilethemotordrivesystemworksindifferentstates.Theinterferencesourceisestablished,assametheinverterparasiticparametersmodelandthemoto
7、rmodelwithimpedancedata.Basedonthemulti-conductortransmissionline(MTL)theory,theequivalentcircuitofcableisproposed,theimpedanceparametersarecalculatedwithanalyticalmethod,whilethecapacitanceandinductanceparametersaresimulatedinMaxwell2Dfiniteelementsoftware.Thepred
8、ictionandsimulationmodelofmotordrivesystemisbuiltinSimulinksoftware,andverifiedbycomparingwiththemeasurementdata.4、Common-modeEMIofmotordrivesyst
