Lifetime prediction of LED lighting systems considering thermal coupling between LED sources and drivers

Azzam Omer Alfarog, Xiaohui Qu, Huai Wang, Frede Blaabjerg, Zhen Li

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    5 Scopus citations

    Abstract

    The lifetime prediction of LED lighting system is important to guide the designers to fulfill the design specifications and to benchmark the cost-competitiveness of different lighting technologies. Currently, the lifetime of LED system is usually predicted from the source part and the driver part separately, and then the thermal design is also optimized independently. In practice, the LED source and driver are usually compacted in a single fixture. The heat dissipated from LED source and driver will be coupled together and affect the heat transfer performance, which may degrade the whole system and accelerate the failure. In this paper, a new thermal model concerning the thermal coupling is proposed with Finite Element Method (FEM) simulation for parameter acquirement. The proposed model has a better estimation of the thermal stresses of key components in the LED lamps and therefore an improved lifetime prediction of the LED systems. Moreover, with a given lifetime requirements, this method can be used to guide the thermal design of the LED system. A case study of an outdoor lighting application is then demonstrated by both FEM simulations and experimental verifications in this digest.

    Original languageBritish English
    Title of host publicationProceedings IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    Pages1273-1278
    Number of pages6
    ISBN (Electronic)9781538611272
    DOIs
    StatePublished - 15 Dec 2017
    Event43rd Annual Conference of the IEEE Industrial Electronics Society, IECON 2017 - Beijing, China
    Duration: 29 Oct 20171 Nov 2017

    Publication series

    NameProceedings IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society
    Volume2017-January

    Conference

    Conference43rd Annual Conference of the IEEE Industrial Electronics Society, IECON 2017
    Country/TerritoryChina
    CityBeijing
    Period29/10/171/11/17

    Keywords

    • FEM simulation
    • LED driver
    • LED source
    • Lifetime prediction
    • thermal coupling

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