本文選題：LED + 散熱　； 參考：《華南理工大學(xué)》2015年碩士論文

【摘要】：隨著發(fā)光效率的提高和單位成本的降低,半導(dǎo)體發(fā)光芯片(LED)應(yīng)用逐漸由傳統(tǒng)的小功率(指示燈、背景燈等)發(fā)展到大功率應(yīng)用場合(工礦燈、路燈等)。散熱和二次光學(xué)設(shè)計是大功率LED照明開發(fā)的兩大關(guān)鍵技術(shù)和核心,對整燈的光效、光品質(zhì)和使用壽命等起著決定性的影響。因此,本文針對大功率LED筒燈,開展了系統(tǒng)的散熱和二次光學(xué)設(shè)計研究。散熱控制方面,首先利用FloEFD仿真軟件構(gòu)建了大功率LED筒燈模型,通過分析,對比研究了四種不同散熱方案的散熱性能,結(jié)果表明:具有煙囪強(qiáng)化對流效應(yīng)的筒狀散熱器結(jié)構(gòu)方案散熱性能最優(yōu)。通過正交試驗法對選定模型的筒壁厚度、導(dǎo)熱基板厚度和翅片數(shù)等三個因素進(jìn)行評價。其次構(gòu)建測試平臺,通過對樣品的實際測試,對比模擬分析數(shù)據(jù),驗證模型及優(yōu)化方案的準(zhǔn)確性,并對比散熱器表面是否涂敷高輻射性能涂料對散熱能力的影響。最后通過模擬,對具有煙囪強(qiáng)化對流結(jié)構(gòu)結(jié)構(gòu)的筒狀散熱器進(jìn)行方向性影響分析,研究流體溫度、速度和軌跡等參數(shù)變化。二次光學(xué)設(shè)計方面,首先提出基于曲面特性的小角度TIR(Total Internal Reflection)透鏡設(shè)計方法,即適當(dāng)設(shè)計指定光線從透鏡的一個表面到另一表面的光路分布,再以此分別迭代計算透鏡的各個表面,以此方法設(shè)計一款小角度配光的TIR透鏡。結(jié)果表明,所設(shè)計的小角度配光透鏡配光角度為6°,照度均勻性達(dá)到97%,能量利用率為85%。該設(shè)計方法能夠快速得到透鏡的曲面形狀參數(shù),適合于小角度配光透鏡的設(shè)計。其次對大功率LED筒燈的進(jìn)行二次光學(xué)設(shè)計。采用軟件優(yōu)化法,根據(jù)目標(biāo)配光曲線和對比傳統(tǒng)的反射器方案,通過分析和優(yōu)化模型,設(shè)計一款新型的反射器,配光角度為80°,能夠有效解決光斑和眩光等問題,并對設(shè)計的大功率LED筒燈進(jìn)行照明模擬以指導(dǎo)實際應(yīng)用。
[Abstract]:With the improvement of luminescence efficiency and the decrease of unit cost, the application of semiconductor light-emitting chip LED has gradually developed from traditional low-power (indicator lamp, background lamp, etc.) to high-power applications (industrial lamp, street lamp, etc.). Heat dissipation and secondary optical design are the two key technologies and cores in the development of high power LED lighting, which play a decisive role in the light efficiency, light quality and service life of the whole lamp. Therefore, the heat dissipation and secondary optical design of high power LED downlight are studied in this paper. In the aspect of heat dissipation control, the high power LED downlight model is constructed by using FloEFD simulation software. Through analysis, the heat dissipation performance of four different heat dissipation schemes is compared and studied. The results show that the heat dissipation performance of the tubular radiator with enhanced convection effect of chimney is optimal. The thickness of cylinder wall, the thickness of heat conduction substrate and the number of fins were evaluated by orthogonal test. Secondly, the test platform is constructed, and the accuracy of the model and optimization scheme is verified by comparing the data of simulation analysis with the actual test of the sample, and the influence of whether the radiator surface is coated with high radiation performance coating on the heat dissipation ability is compared. Finally, through simulation, the directional effect of the tubular radiator with chimney reinforced convection structure is analyzed, and the variation of fluid temperature, velocity and trajectory is studied. In the aspect of quadratic optical design, a design method of small angle TIR(Total Internal reflection) lens based on the surface characteristics is proposed, that is, the light path distribution from one surface to the other surface of the lens is properly designed. Then each surface of the lens is calculated iteratively, and a small angle TIR lens is designed. The results show that the light distribution angle of the small angle distribution lens is 6 擄, the uniformity of illumination is 97 擄, and the energy utilization ratio is 85%. This design method can get the shape parameters of the lens quickly, and it is suitable for the design of the light distribution lens with small angle. Secondly, the secondary optical design of high power LED downlight is carried out. Using software optimization method, according to the target light distribution curve and comparing with the traditional reflector scheme, a new type of reflector is designed by analyzing and optimizing the model. The light distribution angle is 80 擄, which can effectively solve the problems of spot and glare, etc. The design of high-power LED downlight lighting simulation to guide the practical application.
【學(xué)位授予單位】：華南理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TM923.34

【引證文獻(xiàn)】

相關(guān)會議論文 前1條

1 項若飛;曾宇;;紅外熱圖像在功率型LED熱管理中的應(yīng)用[A];第十三屆全國紅外加熱暨紅外醫(yī)學(xué)發(fā)展研討會論文及論文摘要集[C];2011年

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本文編號：1820517