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1、1各专业完整优秀毕业论文设计图纸大功率 LED灯设计及其热分析摘要 发光二极管(Light Emitting Diodes)照明比喻为照明的“绿色革命” ，它以其高效、节能、环保、应用灵活、寿命长、安全性高等等一系列的优点，成为即白炽灯、荧光灯后的又一新兴换代光源。尤其近些年来随着大功率 LED 照明产品在日常照明领域的不断深入普及，使得半导体照明日益受到全球的普遍关注，但随着功率的不断提高，大功率 LED 的热问题也日益突出，限制了它早日走入寻常百姓家的路途，也成为制约其继续发展的关键因素之一，因此，其散热问题亟待解决。 本课题就是从大功率 LED 散热问题入手，通过分析与研究大功率 LED
2、 灯具的散热结构，优化大功率 LED 灯具整体结构设计，快速地散发掉由 LED 光源芯片产生的大量的热量，进而有效地改善其散热，提高更加优质的大功率 LED 灯具照明产品。 本文对 LED 技术产业的全球研究状况与未来的发展趋势做了概括而简明的论述，介绍了本文研究背景及意义。已明确的研究目的开展研究内容，从根源从发，首先对 LED 热问题产生进行阐述，建立完整的热学模型，进行理论分析与实际测试比较。其次，对大功率 LED 灯具的散热器主要影响散热的各个因素进行单一的散热性能分析与研究，并分别对散热器高度 H，半径 r，半径 R,环境温度等等因素与 LED 芯片结温绘制彼此曲线，清晰的反应了各个
3、因素对 LED 芯片结温的影响(即大功率 LED 灯具散热性能的影响)。最后，通过利用有限元热仿真对大功率 LED 灯具散热器进行模拟仿真，使对整个灯具的散热情况更加明朗。 关键词： LED 热设计 热分析 Ansys2Design of High Power LED Lamp and Thermal AnalysisAbstract The light emitting diode (Light Emitting Diodes) lighting lighting compared to the green revolution, with its high efficiency, ener
4、gy saving, environmental protection, flexible application, long service life, high safety, etc., become the incandescent lamp, fluorescent lamp after another new generation light source. Especially in recent years, with the high power LED lighting products in the field of daily lighting further popu
5、larization, the semiconductor lighting universal attention increasingly global, but with the power increasing, the heat of large power LED is becoming more and more prominent, limiting it to enter the common people of the road, has become one of the key factors, the development of it, the heat dissi
6、pation problem. This topic is from the large power LED radiating problems, through the analysis and Research on the heat dissipation structure of high power LED lamps, the optimization design of the overall structure of high power LED lamps, quickly send out a lot of heat is generated by the LED lig
7、ht source chip, so as to effectively improve the heat dissipation, improve the high power LED lighting products more quality. In this paper, the research status of LED technology and the future development trend is summarized and concise elaboration, introduced the research background and the signif
8、icance of this. The purpose of the study has definite research contents, from the root from the hair, first carries on the elaboration to the LED heat problem, establish the thermal model is complete, the theoretical analysis and practical test. Secondly, analysis and Research on the thermal perform
9、ance of single high-power LED lamp radiator mainly affect the heat in various factors, and the radiator height H, radius r, radius R, environmental temperature and so on factors and LED chip junction temperature curve drawing each other, clearly reflects the effects of various factors on the tempera
10、ture of the LED chip (the influence of thermal performance of high-power LED lamp). Finally, by using the finite element thermal simulation to simulate the radiator for high-power LED lamp, so that the heat radiation of the lamp is brighter. Keywords LED Thermal design Thermal analysis Ansys 3目 录第一章 绪 论 .71.1 LED 概述 .71.2 LED 灯的发展历史 .71.3 LED 灯的发光原理及特点 .91.4 LED 灯的市场和应用前景 .10第二章 LED 热分析基本原理 .142.1 LED 灯热传递过程 .142.2 热传递原理 .152.2.1 热传导 .152.2.2 热对流 .162.2.3 热辐射 .172.3 LED 灯参数分析 .182.3.1 导热率 .182.3.2 导热系数 .18第三章 大功率 LED灯有限元分析 .203.1 ANSYS 软件 .203.2 定
