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Термический анализ радиаторов и кристаллов мощных светодиодных модулей при разных материалах теплового интерфейса«СВЕТОТЕХНИКА», 2020, № 4

Журнал «Светотехника» №4

Дата публикации 17/08/2020
Страница 80-88

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Термический анализ радиаторов и кристаллов мощных светодиодных модулей при разных материалах теплового интерфейса«СВЕТОТЕХНИКА», 2020, № 4
Авторы статьи:
Дебашис Раул (Debashis Raul), Камалика Гош (Kamalika Ghosh)

Дебашис Раул (Debashis Raul), M.E. Приглашённый преподаватель и старший научный сотрудник светотехнической школы факультета технического проектирования и электротехники Джадавпурского университета

Камалика Гош (Kamalika Ghosh), Ph.D. В настоящее время она работает доцентом в Школе светотехники и светового дизайна в Университета Джадавпур в Индии. Она является пожизненным членом Института инженеров Индии и Индийского общества инженеров по освещению

Аннотация
Оптические характеристики и надёжность светодиодов (СД) напрямую зависят от их самонагрева. Важное значение имеет рассеяние в окружающее пространство тепла, которое вырабатывается СД, и обеспечение таких же, как заявленные производителями, характеристик СД источников света. Тепловые интерфейсы размещают между радиатором и источником света для уменьшения контактного сопротивленияна границе между подложкой и радиатором СД модуля. В данной работе проведена оценка материалов тепловых интерфейсов (МТИ). При этом рассмотрены как характеристики применяемых на практике МТИ, так и связанные с их использованием проблемы. Это исследование позволит рассчитывать распределение температуры радиатора при использовании МТИ разных типов с разными значениями теплопроводности, определять возможности радиатора в части рассеяния тепла и соответствующим образом конструировать радиатор. Кроме того, при помощи моделирующего пакета программ COMSOL применительно к СД матрицам с бескорпусным монтажом кристаллов на печатной плате (CoB СДМ) проведено исследование имеющих разную толщину МТИ при разных значениях входного тока. Полученные результаты говорят о том, что при увеличении входного тока и толщины слоя МТИ имеет место увеличение температуры p-n-перехода и уменьшение срока службы СДМ.
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