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FloEFD的LED射燈散熱實驗分析

時間:2019-04-21 09:27來源:畢業論文
探究影響LED射燈散熱的因素,分別改變燈珠的個數、燈罩的有無和風扇的有無,設計了八個實驗,利用熱電偶記錄儀進行溫度測量,通過對實驗數據的對比,得出了導熱系數高的燈罩和

摘要:隨著LED光效的不斷提升,LED射燈技術也在迅速地發展。傳統射燈多采用鹵鎢射燈,發光效率較低、比較耗電、使用壽命短。而LED光源在發光原理、節能、環保的層面上都具有較顯著的優勢,并且LED射燈的成本也在下降,所以其應用也廣泛普及。但是LED射燈受其外形、燈頭、和安裝要求限制,使得很難在現有射燈的標準尺寸范圍內將一個LED射燈做到高功率和高光通量。LED電光轉化效率低,使LED射燈嚴重發熱,而LED射燈散熱設計不當,將導致LED芯片結溫過高,器件壽命縮短,光效降低。所以,散熱是LED燈具設計必須著重考慮的因素。
本課題為了探究影響LED射燈散熱的因素,分別改變燈珠的個數、燈罩的有無和風扇的有無,設計了八個實驗,利用熱電偶記錄儀進行溫度測量,通過對實驗數據的對比,得出了導熱系數高的燈罩和加入風扇都能顯著降低LED射燈燈珠溫度的結論。接著對實際的四種燈具模型進行ProE建模,并通過熱流軟件FloEFD進行仿真,得到的模擬溫度結果,與實驗溫度進行比較,最后驗證了實驗中加入高導熱系數材料的燈罩可以增加導熱面積有效降低芯片結溫。34782
畢業論文關鍵詞:LED射燈;散熱;仿真
Analysis of LED spotlight heat dissipation experiment
Abstract:With the luminous efficiency of LED is increasing, LED technology has been developed rapidly. Traditional spotlights uses halogen tungsten spotlights which luminous efficiency is lower, more power consumption, short service life. And the LED light source on the level of luminous principle, energy-saving, environmental protection has more significant advantages, and the cost of the LED spotlights is declining, so its application is also widely used. But the LED spotlights restricted by its appearance, spotlights holder, and installation requirements, it is difficult to let LED achieve a high power and high flux within the scope of the standard size of existing spotlights.LED photoelectric conversion efficiency is low, the serious heating of LED spotlights, and LED spotlights radiating improper design will lead to the LED chip junction temperature is too high, the device life is shortened, light efficiency is reduced. So, the heat dissipation is the factor that must be considered in the design of LED spotlights.
源¥自%六^^維*論-文+網=www.aftnzs.live

This topic in order to explore the factor of influencing the LED spotlights dissipation,according to the change of the number of lamp bead and the presence of lamp-chimney and fan,I have designed eight experiments.And I have recorded the temperature using thermocouple recorder for temperature measurement . Then I have the conclusion that the lampshade of high thermal conductivity and fan can significantly reduce the temperature of the LED spotlight temperature by the comparison of experimental data.Then ProE model of four kinds of LED lanterns is carried out.And the simulation of the heat flux is carried out through the software FloEFD.The results of the simulated temperature which are obtained compared with the experimental data.In the end, the experimental results show that the high thermal conductivity of the material can increase the heat conduction area and reduce the temperature of the chip.
Keywords:LED spotlights;heat dissipation;simulation
目錄
1引言    1
1.1 研究現狀與發展趨勢    1
1.1.1 LED射燈的特點    1
1.1.2 LED射燈散熱方法    1
1.1.3 LED射燈散熱的技術    2
1.1.4 本課題要解決的問題    2
1.2 主要研究內容    3
1.3 研究目的及意義    3
2LED射燈的熱學分析    5
2.1 LED射燈的熱學特性    5
2.1.1 LED芯片的結溫    5
2.1.2 LED的熱阻    5 FloEFD的LED射燈散熱實驗分析:http://www.aftnzs.live/wuli/20190421/32429.html
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