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综合分析了新一代电光源LED的光-电-热理论和现有的相关模型,针对Hui等提出的模型,采用数学推导、仿真和实验相结合的方法,分析了LED封装模组在散热片温度恒定时,其正向电流和输入功率之间存在的一定线性关系。从电路驱动控制角度,进一步推导出一种简化变量的新型LED光电热模型。该模型的变量采用易于检测的LED散热片温度和易于控制的LED正向电流。通过两种典型LED封装模组的光学实验验证了所提模型的可行性。与Hui等的LED光电热模型相比,该模型具有简单、方便电路驱动控制的特点,可为LED照明系统的设计,建立优良光学特性的LED驱动电源控制策略和驱动电路调光控制技术提供理论依据。
A new generation of LED light-electricity-heat theory and existing related models are comprehensively analyzed. According to the model proposed by Hui et al., A mathematical derivation, simulation and experiment are combined to analyze the LED package module in the heat sink When the temperature is constant, there is a certain linear relationship between the forward current and input power. From the perspective of circuit drive control, a new type of LED thermoelectric model is deduced to simplify the variables. The model’s variables use easy-to-detect LED heat sink temperatures and easy-to-control LED forward current. The feasibility of the proposed model is verified by the optical experiments of two typical LED package modules. Compared with the LED photothermal model such as Hui et al., This model has the characteristics of simple and convenient circuit driving control and provides the theory for the design of LED lighting system, the LED driving power control strategy of establishing excellent optical characteristics and the dimming control technology of driving circuit in accordance with.