6doi:10.3969/j.issn.1009-3230.2023.08.002应用能源技术2023年第8期(总第308期)IGBT模块NTC温度与模块壳温、结温关系探究竹永辉,陈周帅,王荣,蔡巧娟(芯派电子科技股份有限公司,陕西西安720075)摘要:ICBT模块封装时内部会集成负温度系数的温敏电阻(NTC)用以监控模块内部温度,工程应用中也多用这个电阻测定温度值来制定IGBT模块高温保护策略。但由于安装位置,NTC所处的热网络热时间常数较大等原因NTC温度与模块真实结温间还是有一些差距。本文通过搭建测试平台在某款车用电机控制器中测定了NTC温度在不同功率,不同冷却液温度、流量等不同工况下与模块结温关系,建立了该款控制器NTC温度与模块结温的关系模型,并通过仿真与实测结果对比分析验证了该模型的准确性。实验结果对其他使用NTC评估模块结温的场合也具有一定指导意义。关键词:IGBT模块;NTC;结温;壳温;电机控制器中图分类号:TN322InvestigationoftheRelationshipbetweenNTCTemperatureandModuleCasingTemperatureandJunctionTemperatureinIGBTModulesZHUYonghui,CHENZhoushuai,WANGRong,CAIQiaojuan(XinpaiElectronicTechnologyCo.Ltd.,Xi'an720075,China)Abstract:InthepackagingofInsulatedGateBipolarTransistor(IGBT)modules,theNegativeTemperatureCoefficient(NTC)thermistorisinternallyintegratedtomonitortheinternaltemperatureofthemodule.Inengineeringapplications,thisthermistoriscommonlyusedtomeasuretemperaturevaluesforformulatinghigh-temperatureprotectionstrategiesforIGBTmodules.However,duetoinstallationlocationandfactorssuchastherelativelylargethermaltimeconstantofthethermalnetworkwheretheNTCisplaced,theremaybesomediscrepanciesbetweentheNTCtemperatureandtheactualjunctiontemperatureofthemodule.ThispaperestablishesatestplatformtomeasuretherelationshipbetweenNTCtemperatureandmodulejunctiontemperatureunderdifferentconditions,includingvariouspowerlevels,coolanttemperatures,andflowrates,inaspecificautomotivemotorcontroller.ArelationshipmodelbetweentheNTCtemperatureandmodulejunctiontemperatureforthiscontrollerisdeveloped.Theaccuracyofthismodelisverifiedthroughcomparativeanalysisofsimulationandexperimentalresults.Theexperimentalfindingsalsoprovidecertainguidingsignificanceforotherscen...