一种应用于遥感成像系统电源板的设计与仿真

Design and simulation of power panel applied in remote sensing imaging system

航天遥感任务中,为了得到较高的信噪比及系统稳定性,对二次电源供电系统具有较高的性能要求。DC-DC模块具有高可靠性、高集成度、高效率等优点,广泛应用于航空航天工程项目。然而,DC-DC模块在转换过程中,其固有噪声和外界引入噪声会对整个成像系统的EMI产生很大影响。综合EMI/EMC考虑,系统采用母线电源经滤波器进入电源系统,输出单元与负载间引入滤波电路减小输出纹波。最后,针对整个电源板的直流压降及电流密度分布进行仿真分析,确保了工程应用中的稳定性与可靠性。

To obtain higher SNR and better system stability in space remote sensing missions,the higher performance re?quirements are put forward for secondary power supply system. DC?DC converter has the advantages of high reliability,high inte?gration and high efficiency,and is widely used in aerospace engineering′s projects. In conversion process of DC?DC module,the inherent noise and ambient noise have significant impact on EMI of entire imaging system. Considering EMI/EMC comprehensively, the busbar power supply adopted by the system is entered into power supply system through the filter. Filtering circuit between output unit and the load is introduced to eliminate output ripple. DC voltage?drop and current density distribution of the entire power panel are proceeded with simulation and analysis. The stability and reliability in engineering applications are ensured.