航天用隔离型双向直流变换器设计与仿真

Design and simulation of isolated bidirectional DC converter for aerospace

机电伺服系统是航天器控制系统的主执行机构,其内部重要部件伺服电源作为提供电能的能量源。本文首先介绍了当前伺服电源的种类,并提出将电容和电池混合储能技术应用于航天伺服电源,其中电池作为主能量源,电容作为辅助能量源。针对电容电压宽范围情况,提出了满足的宽范围电压变化的隔离型双向直流变换器拓扑,分析了该拓扑的原理;针对伺服系统对动态响应要求高,提出了双电流闭环的控制策略,最终通过仿真验证了该电路方案的合理性,在满足伺服电源特性的同时能够大大减小电池的峰值电流,达到维护电池寿命的效果,为航天伺服电源的研制提供有力的参考。

The electromechanical servo system is the main actuator of the spacecraft control system,and its internal important component,the servo power supply,serves as the energy source for providing electrical energy.This paper firstly introduces the current types of servo power supplies,and proposes to apply the hybrid energy storage technology of capacitor and battery to the spacecraft servo power supply,where the battery is used as the primary energy source and the capacitor as the secondary energy source.For the wide range of capacitor voltage,an isolated bidirectional DC converter topology is proposed to meet the wide range of voltage variation,and the principle of the topology is analyzed;for the high dynamic response requirements of the servo system,a dual current closed loop control strategy is proposed,and finally the rationality of the circuit scheme is verified through simulation,which can greatly reduce the peak current of the battery while meeting the characteristics of the servo power supply,and achieve the effect of maintaining the battery The final simulation verified that the circuit scheme is reasonable,which can greatly reduce the peak current of the battery while satisfying the characteristics of the servo power supply,and achieve the effect of maintaining the battery life,providing a powerful reference for the development of aerospace servo power.