基于非隔离型Weinberg变换器多模块并联系统的建模与控制环路设计

Modeling and design of control loops for parallel non-isolated Weinberg converter system

针对卫星电源对于均流精度及电路可靠性要求高的特点,本文提出了改进型峰值电流控制策略,即在传统峰值电流控制的基础上增加了平均电流控制,以提高均流精度和电路可靠性.本文以非隔离型Weinberg变换器的三模块并联系统为例,根据参数指标的要求,进行系统小信号建模及控制环路设计.最后制作1 200 W实验样机,验证控制环路设计的合理性及改进型峰值电流控制方案的优越性.该控制策略适用于对均流精度及集成度要求很高的系统级场合.

The current sharing accuracy and circuit reliability are emphasized in avionics DC power supply,so improved peak current control strategy is proposed.Based on the three-module non-isolated Weinberg converter system,this paper models the system and designs the controllers.The experimental results are given to verify the effectiveness of the design and superiority of improved peak current control by a 1 200 W prototype.This control strategy is suitable for the system-level application which requests more on the current sharing accuracy and integrity.