预览加载中，请您耐心等待几秒...

一种电动汽车逆变器IGBT功率损耗和结温的近似计算方法.docx

预览
1/2
2/2

在线预览结束，喜欢就下载吧，查找使用更方便

下载提示 文本预览

如果您无法下载资料，请参考说明：

1、部分资料下载需要金币，请确保您的账户上有足够的金币

2、已购买过的文档，再次下载不重复扣费

3、资料包下载后请先用软件解压，在使用对应软件打开

一种电动汽车逆变器IGBT功率损耗和结温的近似计算方法 Title:ApproximateCalculationMethodforPowerLossandJunctionTemperatureofanIGBTInverterinElectricVehicles Abstract: Inrecentyears,electricvehicles(EVs)havegainedsignificantattentionduetotheirenvironmentalbenefitsandpotentialforreducinggreenhousegasemissions.Onecrucialcomponentinthepowertrainofanelectricvehicleistheinverter,responsibleforconvertingDCpowerfromthebatterytoACpowerfordrivingtheelectricmotor.TheInsulatedGateBipolarTransistor(IGBT)iscommonlyusedinEVinvertersduetoitshighpowerhandlingcapabilitiesandefficientswitchingperformance.However,IGBTpowerlossandjunctiontemperatureneedtobecarefullymanagedtoensurelong-termreliabilityandoptimalperformance.ThispaperpresentsanapproximatecalculationmethodforestimatingIGBTpowerlossandjunctiontemperatureinanEVinverter. 1.Introduction: Electricvehiclesarebecomingincreasinglypopularasasustainabletransportationsolution.TheinverterinanelectricvehicleplaysavitalroleinconvertingbatteryDCpowertoACpowertodrivetheelectricmotor.TheIGBT,beingacrucialcomponentoftheinverter,needstobeaccuratelycharacterizedtoensureefficientoperationandpreventthermaldamage. 2.IGBTPowerLossCalculation: ThepowerlossinanIGBTcanbedividedintotwomaincomponents:conductionlossandswitchingloss. a)ConductionLoss:Thisincludestwotypes-on-statevoltagedropandforwardvoltagedrop.Theon-statevoltagedropcanbecalculatedusingtheIGBTdatasheetprovidedbythemanufacturer.ForwardvoltagedropcanbecalculatedusingtheIGBT'srecoverableenergyandtheloadconditions. b)SwitchingLoss:SwitchinglossiscausedbythetransitionbetweentheonandoffstatesoftheIGBT.Itconsistsofturn-onandturn-offlosses,whichcanbeapproximatedusingtheIGBT'sswitchingcharacteristicsandtheappliedvoltageandcurrentwaveforms. 3.JunctionTemperatureCalculation: ThejunctiontemperatureofanIGBTmustbekeptwithinaspecifiedlimittoavoidthermalbreakdown.Toestimatethejunctiontemperature,thepowerlosscalculatedintheprevioussectioncanbeused.ThepowerlossvaluecanbemultipliedbythethermalresistanceoftheIGBTmoduleandaddedtotheam