DC-DC变换器的最小投影法切换律  

Switching Rule Based on Min-projection Strategy of DC-DC Converters

作　　者：肖文勋[1] 张波[1] 

机构地区：[1]华南理工大学电力学院,广东省广州市510640

出　　处：《中国电机工程学报》2009年第3期1-6,共6页Proceedings of the CSEE

基　　金：国家自然科学基金项目(60474066);广东省自然科学基金重点项目(605103540)~~

摘　　要：采用分段线性系统分析方法,DC-DC变换器的稳定性研究和控制器设计变得十分简单和有效。为此,该文建立DC-DC变换器的切换线性系统模型,引入切换线性系统投影法的概念,提出最小投影法切换律的控制策略。具体论述了DC-DC变换器实现无源控制与全局稳定性的切换律设计方法与步骤,并针对该切换律与平衡点相关的特点,在设计中进行平衡点的补偿以提高切换律的鲁棒性与收敛率。此外,为解决最小投影法切换律存在的滑模问题,还进行适合于DC-DC变换器的延时切换器设计。仿真和实验结果表明该文提出的最小投影法切换律在实际DC-DC变换器中具有普遍适用性。Stability study and control design of DC-DC converters are handled easily and efficiently by utilizing piecewise linear systems analysis approach. So this paper models DC-DC converters as switched linear systems, introduces projection strategy conception of switched linear systems, and proposes control strategy of switching rule based on min-projection strategy. Design approach and procedure for the proposed switching rule of DC-DC converters which realizes passive control and global stability are presented. And according to the feature that the proposed switching rule depends on the equilibrium point, the desired equilibrium point is compensated for advancing robust and convergent rate of the proposed switching rules. In addition, a clock delay control is designed to overcome the problem of sliding motion in the rain-projection strategy based switching rule. The simulation and experiment results demonstrate that the proposed min-projection strategy based switching rule is generally applicable to the practical DC-DC converters.

关 键 词：DC—DC变换器 切换线性系统 最小投影法 切换律 

分 类 号：TM113[电气工程—电工理论与新技术]