车灯内光源光谱分布对热设计的影响

Influence of Spectral Distribution of Interior Light Source on Thermal Design

目前,在CAE热学模拟过程中都是采用固定的发光效率来计算热功率,然而实际上,LED的发光效率是随着温度的升高而逐渐降低的,这就会导致实际结果发生偏差。文章采用实际的光谱分布来计算光源真实的发光效率,以此获得更为确切的光源热耗散功率,提高了设计阶段的热模拟精度,对于企业降低成本有着非常重要的意义。

Fixed luminous efficiency is used to calculate thermal power in CAE thermal simulation process at present.However,in fact,the luminous efficiency of LED decreases gradually with the increase of temperature,which will cause deviation.In this paper,the actual spectral distribution is used to calculate the real luminous efficiency of the light source,and a more accurate power of the heat dissipation of the light source can be obtained.It has a great significance for improving the accuracy of thermal simulation and reducing the cost in the design stage.