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通过双向热阻模型描述LED系统内部双向散热路径,进而构建光电热一体化模型。基于双向热阻模型参数,光电热一体化模型可高精度预测LED系统的结温以及光通量。实验验证结果表明,基于所提出的双向热阻模型的结温计算值和实验值的平均误差在5.3%之内,而采用传统的单向热阻模型的结温计算值和实验值的平均误差达到11.2%。基于双向热阻模型的光电热一体化理论,光通量的计算值与实验值的平均误差在6.3%之内。
The bi-directional thermal resistance model is used to describe the bidirectional thermal path inside the LED system, and then the integrated photovoltaic-thermal model is constructed. Based on the bidirectional thermal resistance model parameters, the opto-thermal model can predict the junction temperature and luminous flux of the LED system with high accuracy. The experimental results show that the average error between the calculated and experimental values of the junction temperature based on the proposed two-way thermal resistance model is within 5.3%. However, the calculated average junction temperature and the average error of the experimental values Reached 11.2%. Based on the photo-thermal integration theory of the bidirectional thermal resistance model, the average error between the calculated and experimental values of the luminous flux is within 6.3%.