牵引变流器中6500 V场终止IGBT的物理场仿真研究-豆柴文库

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牵引变流器中6500V场终止IGBT的物理场仿真研究
Title:PhysicalFieldSimulationStudyon6500VFieldTerminationofIGBTinTractionInverter
Abstract:
Inrecentyears,tractioninvertersusingInsulated-GateBipolarTransistors(IGBTs)havegainedsignificantattentioninthefieldofelectricvehicles.AcrucialfactorforthereliableandefficientoperationoftheseinvertersistheproperterminationoftheIGBT'shighvoltageelectricfield.Thispaperpresentsacomprehensiveoverviewandsimulationstudyofthephysicalfieldterminationofa6500VIGBTusedinatractioninverter.Thesimulationresultsrevealtheimportanceofaccuratefieldterminationdesignforoptimalperformance.
1.Introduction
Withtheincreaseindemandforelectricvehicles,theroleoftractioninvertersinconvertingtheDCpowerfromthebatterytoACpowerformotoroperationhasbecomemoreprominent.IGBTsarecommonlyusedaspowerdevicesintheseinvertersduetotheirfastswitchingcharacteristicsandhighvoltagehandlingcapability.However,oneofthechallengesassociatedwithIGBTsistheneedforeffectivefieldterminationtopreventvoltagebreakdownandtoensurereliableoperationunderhighelectricfieldconditions.
2.Background
TheconceptoffieldterminationreferstothemethodsemployedtodistributeandterminatethehighelectricfieldgeneratedduringtheIGBT'soperation.AfieldterminationelectrodeistypicallyaddedtothestructureoftheIGBTtoachievethisgoal.Variousterminationtechniqueshavebeenproposed,withtheaimofminimizingfieldcrowdingandenhancingvoltageblockingcapability.
3.SimulationSetup
Toinvestigatethephysicalfieldtermination,anumericalsimulationofthe6500VIGBTwithafieldterminationelectrodewasconductedusingfiniteelementanalysistools.ThesimulationmodelwascreatedbasedontheIGBT'sdevicestructureandmaterialproperties.Theelectricfielddistribution,potentialdistribution,anddevicecharacteristicswereanalyzedunderdifferentoperatingconditions.
4.ResultsandDiscussion
Thesimulationresultsindicatethatthefieldterminationelectrodeplaysacrucialroleinreducingelectricfieldcrowdingandenhancingvoltageblockingcapability.Furthermore,thegeometryandpositionoftheterminationelectrodesign