有限元分析下的大功率LED 灯优化热设计

吉林大学学报(信息科学版) ›› 2015, Vol. 33 ›› Issue (5): 550-.

有限元分析下的大功率LED 灯优化热设计

徐敬华a, 尚楠b

浙江大学a. 机械工程学院; b. 电气工程学院, 杭州310027

收稿日期:2015-05-20 出版日期:2015-09-30 发布日期:2015-12-30
作者简介:徐敬华(1979—), 男, 山东青岛人, 浙江大学副教授, 主要从事计算机辅助设计研究, (Tel)86-13575741382 (E-mail)xujh@ zju. edu. cn; 通讯作者: 尚楠(1993—), 女, 吉林省吉林市人, 浙江大学电气工程学院本科生, 主要从事电力系统分析研究, (Tel)86-18868181578(E-mail)ZJUee_sn@163. com。

Optimization Design of Power LED Light Based on Finite Element Analysis

XU Jinghuaa, SHANG Nanb

a. College of Mechanical Engineering; b. College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China

Received:2015-05-20 Online:2015-09-30 Published:2015-12-30

摘要/Abstract

摘要：

为解决LED(Light-Emitting Diode)因功率过低而使其寿命受限的问题, 对现有的LED 轨道灯的散热器结构及驱动电路进行了改进与优化设计。设计以图形用户界面应用程序Ansys 作为开发平台, 通过Gambit 剖分以及温度场Fluent 仿真实现了LED 轨道灯的优化热设计。同时, 以50 W 功率的LED 热分布模型为例, 给出了LED 温度分布机制和温度场分析的解析模式及其理论公式推导、实验数据测量和仿真场图分析。研究结果表明, 该新型LED 优化热设计在提高LED 功率(从30 W 提高到50 W)的同时使温度从80 益降低到76 益, 从而提高了灯具的使用寿命, 改善了照明效果。

关键词: 有限元分析方法, Gambit 剖分, 温度场Fluent 模拟

Abstract:

In order to solve the current life-limited problem of the LED(Light Emitting Diode) with the power increasing, we made an optimization design of the existing LED track light radiator structure and the driving circuit. This design chooses the graphical interface application Ansys as a development platform, integrates
design of the simulation combined with the experimental data by using Gambit subdivision and Fluent software temperature field simulation. We choose the 50 W power LED heat distribution model as an example, present a distribution mechanism of LED temperature, the analytical model of the temperature field, the theoretical formula, the experimental field measurement data and the analysis of the simulation graph. The research showed that the new LED optimized thermal design realized the increase of LED power from 30 W to 50 W, while achieving the LED using temperature decreased from 80 ℃to 76 ℃. So the model achieved the extension of service life and the improved effect of lighting.

Key words: finite element method (FEM), Gambit subdivision, Fluent simulate temperature field

中图分类号:

TM923. 34

徐敬华a, 尚楠b. 有限元分析下的大功率LED 灯优化热设计[J]. 吉林大学学报(信息科学版), 2015, 33(5): 550-.

XU Jinghuaa, SHANG Nanb. Optimization Design of Power LED Light Based on Finite Element Analysis[J]. Journal of Jilin University(Information Science Ed, 2015, 33(5): 550-.