IGBT的温度周次及功率周次介绍-可靠性介

ReliabilityofIGBTModulesPage1IGBTPowercyclingandthermalcyclingcapabilityIFXAIMZhouYizhengPage2ForinternaluseonlyReliabilityofIGBTModulesPage2IGBTModuleLayersofMaterialsPage3ForinternaluseonlyReliabilityofIGBTModulesPage3PowercyclingPage4ForinternaluseonlyReliabilityofIGBTModulesPage4FailuremechanismafterPCPage5ForinternaluseonlyReliabilityofIGBTModulesPage5BondwireconnectionCracksPage6ForinternaluseonlyReliabilityofIGBTModulesPage6BondwireconnectionLift-offPage7ForinternaluseonlyReliabilityofIGBTModulesPage7PCDiagramMedium&HighPowerStandardModulesPowerCycling:Medium&HighPowerStandardModules1.0E+041.0E+051.0E+061.0E+071.0E+081.0E+091.0E+101.0E+1110100DeltaTjinKn(No.ofCycleStandardModulesTjmin=25°CStandardModulesTjmax=125°Cdottedlines:estimatedPage8ForinternaluseonlyReliabilityofIGBTModulesPage8PCDiagram600VIGBT3StandardModulesPowerCycling:IGBT3,600VStandardModules1,0E+041,0E+051,0E+061,0E+071,0E+081,0E+091,0E+101,0E+1110100DeltaTjinKn(No.ofCycles)IGBT3,600VTjmin=25°CIGBT3,600VTjmax=150°Cdottedlines:estimatedPage9ForinternaluseonlyReliabilityofIGBTModulesPage9PowerCycling:Medium&HighPowerModules(Tjmax=125°C)1,0E+041,0E+051,0E+061,0E+071,0E+081,0E+091,0E+101,0E+1110100DeltaTjinKn(No.ofCycles)TractionModulesStandardModulesdottedlines:estimatedPCDiagramMedium&HighPowerTractionModulesPage10ForinternaluseonlyReliabilityofIGBTModulesPage10PCAccelerationFactorAnincreaseofthetemperaturelevelby25°Creducedthemodulelifetimeby50%.Page11ForinternaluseonlyReliabilityofIGBTModulesPage11PowercyclecurvesforIGBT4AtTj=125℃TwotimesofPCoftractionmoduleFivetimesofPCthannormalmoduleImprovementofmountingtechnologyPage12ForinternaluseonlyReliabilityofIGBTModulesPage12功率周次失效模式Page13ForinternaluseonlyReliabilityofIGBTModulesPage13功率周次寿命的影响因素!所使用的芯片/模块类型!工作时的结温波动ΔT!工作时的最高结温!结温波动的曲线Page14ForinternaluseonlyReliabilityofIGBTModulesPage14怎样来估算模块的功率周次寿命!1,得到系统工作的温度波动和工作的最高结温。¬建议使用IPOSIM仿真计算软件FF400R12KE3:P=I*Vcesat*D=300*1.45*0.7=304W仿真结果得到芯片的温度变化是46.7度Page15ForinternaluseonlyReliabilityofIGBTModulesPage15IPOSIMCharacteristics!IPOSIMisaquickselectiontoolforinfineonIGBTmodulesandshortencustomerdevelopmentschedules.!IPOSIMisflexibleandeasyforcustomerandhasbetteruserinterface.!IPOSIMsimulationresultsdependonIGBTdatasheetparameters.!IPOSIMsimulationcanselectdifferentmodulesforbenchmark.!IPOSIMperformsanapproximatecalculationofswitchingandconductionlossesforIGBTsandfree-wheelingdiodes.!IPOSIMworksundertheassumptionofasinusoidaloutputcurrentanduseslinearapproximation.!IPOSIMhastheoptiontonotonlycalculatesteady-stateoperationpointsbutcompleteloadcycles.Page16ForinternaluseonlyReliabilityofIGBTModulesPage16BasicprincipleGRoioVdcVaThTϕofpItttt1IGBTi2Di2IGBTi1Di!Thedirectionofcurrentflow;!Thedistributionofpowerloss;Page17ForinternaluseonlyReliabilityofIGBTModulesPage17On“loadcyclecalculation”sheet1.Enterupto50setsofdataforaloadcycle2.Specifytimeconstantofheatsink3.Pressthebutton只要把周期内的损耗和实际工况相一致，就可以使用IPOSIM进行周次计算了Page18ForinternaluseonlyReliabilityofIGBTModulesPage18On“Loadcyclediagram”sheet1.Voltageandcurrentvstime2.Temperaturevstime3.lossesvstimePage19ForinternaluseonlyReliabilityofIGBTModulesPage19Page20ForinternaluseonlyReliabilityofIGBTModulesPage20怎样来估算模块的功率周次寿命PowerCycling:IGBT3,600VStandardModules1,0E+041,0E+051,0E+061,0E+071,0E+081,0E+091,0E+101,0E+1110100DeltaTjinKn(No.ofCycles)IGBT3,600VTjmin=25°CIGBT3,600VTjmax=150°Cdottedlines:estimated!1,通过表格查出实际的可耐受的功率周次的次数。¬如果不知道绝对最高结温，建议使用最高结温的曲线¬如果知道绝对最高结温，则可以跟据降额表，做一定的降格，（25度/1倍）查表得到寿命次数为：4*10e5次根据工作情况2Hz,一天工作16小时计算：4*10e5/2/60/60/16=4天?实际的失效是3-5个月Page21ForinternaluseonlyReliabilityofIGBTModulesPage21怎样来估算模块的功率周次寿命!最好的方法还是结合实际情况来估算寿命如果采用FF600R06ME3P=I*Vcesat*D=300*1.2*0.7=252W用IPOSIM仿真得到的温度波动为：31.9度.Page22ForinternaluseonlyReliabilityofIGBTModulesPage22怎样来估算模块的功率周次寿命!从我们600VE3芯片的功率周次特性曲线上可以看到温度温波在32度的寿命是温度纹波在47度寿命的30倍.!这样的话如果原来400A模块在3-5个月失效，现在用这款600A的模块寿命可以大大的提高，至少达到3*30=90个月。不同厂商的芯片连接技术是不同的，如果是不同厂商的器件的话，功率周次需要重新计算并考核Page23ForinternaluseonlyReliabilityofIGBTModulesPage23EconoDUAL™3HalfBridges/Chopper600VIGBT3insideHalfBridgewithNTCHalfBridgeModuleswith600VIGBT3(E3)includingNTC.NominalcurrentperswitchFF200R06ME3:ICnom=200AFF300R06ME3:ICnom=300AFD400R06ME3_S2:ICnom=400ATvjopof150°CmaxNewNew功率周次提高2倍Page24ForinternaluseonlyReliabilityofIGBTModulesPage24EconoDUAL™3HalfBridges/Chopper600VIGBT3insideHalfBridgewithNTCHalfBridgeModuleswith600VIGBT3(E3)includingNTC.NominalcurrentperswitchFF450R06ME3:ICnom=450AFF600R06ME3:ICnom=600AFD600R06ME3_S2:ICnom=600ATvjopof150°CmaxNewNew功率周次提高2倍Page25ForinternaluseonlyReliabilityofIGBTModulesPage25EconoDUAL™2HalfBridgesIGBT4(T4)+EmCon4insideHalfBridgewithNTCNewNew功率周次提高5倍HalfBridgeModuleswith1200VIGBT4(T4)includingNTC.NominalcurrentperSwitchFF100R12MT4:ICnom=100AFF150R12MT4:ICnom=150AFF200R12MT4:ICnom=200ATvjopof150°Cmax