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...
