دانلود مقاله ISI انگلیسی شماره 146734
کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
146734 2017 12 صفحه PDF سفارش دهید 5758 کلمه
خرید مقاله
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عنوان انگلیسی
A novel lifetime prediction for integrated LED lamps by electronic-thermal simulation
منبع

Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)

Journal : Reliability Engineering & System Safety, Volume 163, July 2017, Pages 14-21

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پیش نمایش مقاله

چکیده انگلیسی

In this paper, an integrated LED lamp with an electrolytic capacitor-free driver is considered to study the coupling effects of both LED and driver’s degradations on lamp’s lifetime. An electrolytic capacitor-less buck-boost driver is used. The physics of failure (PoF) based electronic thermal simulation is carried out to simulate the lamp’s lifetime in three different scenarios: Scenario 1 considers LED degradation only, Scenario 2 considers the driver degradation only, and Scenario 3 considers both degradations from LED and driver simultaneously. When these two degradations are both considered, the lamp’s lifetime is reduced by about 22% compared to the initial target of 25,000 h. The results of Scenario 1 and 3 are close to each other. Scenario 2 gives erroneous results in terms of luminous flux as the LED’s degradation over time is not taken into consideration. This implies that LED’s degradation must be taken into considerations when LED and driver’s lifetimes are comparable.

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پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.