【摘要】 依据指标要求(结温不超过85℃)对长寿命空间遥感器大功率电控箱进行热设计。统计电控箱内所有功率大于200mW的元器件,逐级建立有限元模型进行热分析,得出各大功率元器件的壳温,优化散热路径,热分析迭代,再辅以热试验的验证,从而得出一种高效地热设计方案。经热分析优化后,在60℃的环境温度下,电控箱内元器件壳温最高到73.4℃(结温80.6℃)。实物在等温度环境条件的热试验,元器件表面最高温度为74.142℃。结果证实设计的方法满足设计指标要求。更多还原

【Abstract】 A thermal design of a high-power electric cabinet for a long-life space camera was performed according to the index requirements(junction temperature<85℃).All components in the electric cabinet with power greater than 200 mW were counted.Through the step-by-step finite element simulation analysis(FEA), the shell temperature of each high-power component was obtained, the thermal analysis iteration was carried out, the heat dissipation path was optimized, and the thermal test verification was supplemented to obtain an efficient geothermal design scheme.At the ambient temperature of 60℃, the shell temperature of the component FEA was 73.4℃(junction temperature 80.6℃).The real object was subjected to a thermal test under isothermal environmental conditions, and the maximum shell temperature of the component was 74.142°C.The results confirm that the design method meets the design index requirements.更多还原