基于电晕放电的大功率LED散热研究

摘要

An ionic wind cooling method based on corona discharge theory was presented to meet the thermal demand of high power LED. The electrical properties of corona discharge were studied through experimental measurement. The effect of discharge voltage on the refrigerating performance was researched, as well as the change laws of temperature drops with discharge power. The experi-mental results indicate that the negative corona can generate ionic wind at lower voltage and result in siganificant cooling at the same electrode gap comparing with positive corona. The corona current square root displays a good linear relationship to the applied voltage. The optimal refrigerating per-formance is attained at 1. 5 W power and 10 mm electrode gap.%针对大功率LED芯片的散热问题，提出了一种基于电晕放电原理的离子风散热方案。通过试验，研究了电晕放电的电学性能，同时探寻了放电电压对制冷效果的影响以及温降随电晕放电功率的变化规律。结果表明，放电间距相同时，对发生器施加负电晕能够在较低的电压下产生离子风，降温效果显著。电晕电流平方根与放电电压呈线性关系。电晕放电功率为1.5 W、放电间距为10 mm时，散热效果最好。