DC-DC buck变换器时间延迟反馈混沌化控制

Chaotification control of buck converter via time-delayed feedback

混沌化或反混沌控制是混沌控制的逆问题,通过研究DC-DCbuck变换器反混沌控制,为其应用打下理论基础.建立了电压时间延迟反馈buck变换器混沌化控制模型,探讨了它的控制机理,分析了buck变换器混沌化条件和稳定特性,由此仿真研究了不同控制参数对变换器混沌化控制的影响.实验结果表明,该方法控制范围宽,易于实现,是一种较好的反混沌控制方法.

Chaotification is an inverse process of chaos control. This paper addresses the mechanism of chaotification of buck converter. A new chaotification model of buck converter is established. Then the chaotification rule of buck converter is discussed. The fact that using time-delay feedback at the input can realize chaotification in buck converter is proved. The ranges of control parameters are determined using nonlinear dynamics stability theory. Computer simulation is made to verify the proposed method and analyze the influence of different control parameters. The theoretical results are verified by experimental measurements.