单原边绕组双输入直流变换器的解耦控制

摘要

Isolated multiple-input converters have plenty of interacting control loops due to integrated trains,and a proper decoupling method is needed to eliminate the coupling of loops.This paper elaborated the design of two loops according to a single primary winding dual-input buck converter.A detailed approach was provided utilizing statespace averaging method to obtain the small-signal model of the converter and the transfer function matrix from control to output.Then a decoupling network was added to allow seperate controller designs.Simulation results verify the control design.%研究直流变换器的优化设计问题,对具有耦合系统的隔离型多输入变换器进行闭环设计,为了提高效率,减少漏感,需要运用合理的解耦方法去除环路之间的相互耦合.以双输入为例阐述了单原边绕组隔离型双输入buck变换器的双环控制策略及其闭环设计.运用空间状态平均法对变换器进行建模,得到系统的小信号数学模型控制对输出的传递函数矩阵,同时为了能够单独设计各个环路的控制器,通过对矩阵进行变换而加入了一个解耦网络.仿真结果证明,设计的闭环直流变换器是正确的.