大功率LED工矿灯散热设计与研究
发布时间：2019-04-26 07:52
【摘要】：LED光源为冷光源,其拥有着不少其它一般传统照明光源无法比拟的优势,它具有光效强、寿命长、安全、节能、环保等优点,在日常生活和工农业照明中得到了广泛的应用。这些优势都是其它传统光源所不具有的。而以LED为光源的照明灯具的寿命受到LED灯珠光源工作温度的影响,温度越高,其寿命越短。因此近年来对大功率LED灯具的散热设计和研究成为LED照明灯具中的重点研究课题。本课题是应一家公司要求,对一款150 W的大功率LED工矿灯的散热器进行重新改进设计,将其原来的强制风冷散热装置Y 更为自然对流散热装置。在满足客户成本,散热系统重量等方面要求的前提下,将LED光源节温控制在85℃以下,论文主要从以下几方面展开研究:①在客户给定约束条件下,通过自然对流换热理论,将太阳花等效为一般的散热片模型,通过计算换热过程中的瑞利数,计算得到在给定约束条件下的太阳花FIN片间的等效间距,结合太阳花散热器的结构特点,最终确定了太阳花散热器的尺寸、重量、加工工艺、制造成本等重要参数。②构建了所设计150W大功率LED工矿灯的试验平台,在环境温度为28℃条件下对灯具正常的散热性能进行了测试。③通过等效简化,建立了散热器的散热性能数值模型,采用电子散热模拟软件ICEPAK对散热器的散热能力进行了模拟,同时分析了散热器空间位置的温度分布,散热器的导热、散热性能。通过上面的研究,本文得到如下的结果:在灯具为150W,灯珠为126颗条件下,散热器设计尺寸为直径200 mm,高200mm,FIN数量为48片,FIN片间平均距离为8.6 mm,对流换热系数约为4.3 W/m2K,重量约3.5kg,总成本约158元人民币。试验测试数据得到,散热器底部最高温度为54℃,PCB基板背面温度为64℃,可以推断散热器底面实际的最高温度约为60℃左右,LED节温小于85℃,与理论计算吻合良好。数值模拟显示,在工作环境温度为25℃条件下,散热器最高温度为60℃,与上述实际测试有3℃的差异,这主要是由于测试点的位置不是散热器最高温度点所导致的。但是总体看,理论估算参数,试验测试结果,数值模拟得到的数据,三者还是较为吻合的。
[Abstract]:LED light source is a cold light source, which has many advantages over other traditional lighting sources. It has the advantages of strong light efficiency, long life, safety, energy saving, environmental protection and so on. It has been widely used in daily life and industrial and agricultural lighting. These advantages are not available to other traditional light sources. The service life of LED lamp is affected by the working temperature of LED lamp-bead light source. The higher the temperature is, the shorter the life of the lamp is. Therefore, in recent years, the heat dissipation design and research of high-power LED lamps and lanterns has become an important research topic in LED lighting lamps and lanterns. In response to the request of a company, the radiator of a 150W high-power LED lamp is redesigned and its original forced air-cooled cooling device Y is made more natural convective heat dissipation device. In order to meet the requirements of customer cost, heat dissipation system weight and so on, the temperature saving of LED light source is controlled below 85 鈩，
本文编号：2465885
[Abstract]:LED light source is a cold light source, which has many advantages over other traditional lighting sources. It has the advantages of strong light efficiency, long life, safety, energy saving, environmental protection and so on. It has been widely used in daily life and industrial and agricultural lighting. These advantages are not available to other traditional light sources. The service life of LED lamp is affected by the working temperature of LED lamp-bead light source. The higher the temperature is, the shorter the life of the lamp is. Therefore, in recent years, the heat dissipation design and research of high-power LED lamps and lanterns has become an important research topic in LED lighting lamps and lanterns. In response to the request of a company, the radiator of a 150W high-power LED lamp is redesigned and its original forced air-cooled cooling device Y is made more natural convective heat dissipation device. In order to meet the requirements of customer cost, heat dissipation system weight and so on, the temperature saving of LED light source is controlled below 85 鈩，
本文编号：2465885
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