某星载阵面电源热设计与仿真分析

Thermal Design and Simulation Analysis of a Space-borne Array Power Supply

星载阵面电源是星载雷达天线阵面重要的电子设备,阵面电源稳定性与可靠性的高低关系到整个阵面系统设备的可靠性工作。文中介绍了星载阵面电源热设计的特点与方法,针对不同的功率器件和组件,与结构设计相结合,探索合理的散热途径。特别是许多小功率器件的分布位置及功能要求不同,受到电源内部空间的限制,热设计方法也各不相同。通过Flo EFD软件热仿真分析,优化热设计方案,控制每个器件的温升满足设计要求,并进行了热真空试验验证。

Space-borne array power supply is an important electronic equipment for radar antenna array. The reliability and stability of array power supply has a significant effect on the whole antenna array system. This paper introduces the characteristics and meth- ods of the thermal design in space-borne array power supply. For different power devices and components, the reasonable cooling scheme is explored, through considering the effect of the mechanical design. In particular, requirements are different for the loca- tion and functions of many small power devices, which are subject to the internal space of power supply, thus, different thermal design methods are necessary. The thermal design scheme is optimized by thermal simulation analysis of FloEFD software, and confirmed by thermal vacuum test, which is in order to control the temperature of each device for fitting the design requirements.