一种空间用双向直流斩波电路拓扑

Topology of a bidirectional DC chopping circuit for space

针对空间环境应用的限制,提出一种空间用双向直流斩波电路拓扑。将放电变换器和充电变换器结合在一个变换器拓扑中,使得空间用电源系统体积更小、重量更轻以及功率密度更高。对提出的电路拓扑双向工作原理进行详细分析,对其升压过程和降压过程的电路增益进行理论推导。采用电压外环和电流内环的双环控制策略实现电路的升压和降压,完成电源系统的放电和充电过程。搭建计算机仿真模型和物理实验平台进行仿真和实验验证,结果表明提出的拓扑正确可行。

In view of the limit of space application environment,a bidirectional DC chopping circuit topology is proposed. The discharging and charging converters are combined in a converter topology,where smaller size,lighter weight and higher power density of the space power supply system can be achieved. The bidirectional working principle of the proposed circuit topology is analyzed in detail,and the circuit gain of the boost and buck process is theoretically derived. The dual-loop control strategy of voltage outer loop and current inner loop are employed to realize the increase and decrease of the circuit voltage,and the discharging and charging process of the power supply system are completed. Both computer simulation model and physical experimental platform are built,and simulative and experimental results demonstrate that the proposed topology is effective and feasible.