功率型led车灯散热性能研究

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1、万方数据功率型LED车灯散热性能研究关键词：功率型LED，有限元分析，Icepak，热特性，结构函数II万方数据江苏大学专业学位硕士学位论文ABSTRACTWiththerapiddevelopmentofsemiconductorscienceandtechnology，light—emittingdiodehasbecomethefirstchoiceforthenextgenerationofautomotivelightingtechnologyforitsenergy·efficiency

2、,environmentalprotection，smallsizeetc，．Withtheapplicationofhigh—powerLEDlightsourceintheautomotivefield，theheatproblembecomesthemostimportantfactorlimitingitsdevelopment．AndthelargeamountofworkingheatleadtotheLEDjunctiontemperatureroseandleadtoproblems

3、suchaslightoutputreducingandservicelifereducing．Therefore，agoodthermaldesignistheresearchfocusoftheLEDlightingdevelopment．AthermalperformancetestoftheLEDisdonebyusingtheelectricalparametermethodandstructurefunctiontheory．AndthefactorsthataffecttheLEDth

4、ermalperformanceareanalyzed．Bycomparison，thethermalresistanceoftheLEDdoesnotchangewiththeexternalenvironment；afteraddingaheatsink，thethermalresistanceoftheLEDfromtheP-Njunctiontoambientdecreased72．14％，externalheatsinkplaysanimportantroleontheLEDsystem．

5、Akindofhigh．powerLEDautolampisdesignedandproduced．Usethethermocoupletemperaturemeasurementprincipleandthethermalperformanceteststomeasurethethermalresistanceandthejunctiontemperature．Thesimulationmethodbetweenthree—dimensionaldesignsoftwarePRO／Eandfini

6、teelementthermalanalysissoftwareIcepakisusedtodothethermodynamicsimulationofhigh—powerLEDlights．Comparedwiththeexperimentalresults，thesimulationresultsshowsthatthesimulationmodelhasahighreliability；andthesimulationobtainstheLEDlightsjunctiontemperature

7、inbothstationaryanddrivingconditionswhichverifiesthereliabilityofthelampstructure．ThenthethesisanalysesandcombinesthefactorsaffectingthethermalreliabilityofthelampsandsimulatestheeffectsoftheLEDlightsjunctiontemperaturefromdifferentchipbondingmaterials

8、，thesubstratematerialsandtheheatsinkmaterials．Consideringtherelationshipamongthecoolingeffect，productioncostsandIII万方数据功率型LED车灯散热性能研究productionprocessoftheLEDlights，thethesisselectstheappropriatepackagingmaterialsandproposedtheoptimizat