摘要
作为典型的分段光滑系统,DC-DC变换器中会出现诸多复杂的非线性现象,如分岔与混沌。文中从系统传递能量的角度分析了电压反馈型DC-DC buck变换器中混沌产生的机理,指出系统能量的增加是使系统产生混沌的主要原因。在此基础上,提出了一种采用以电感电流为控制变量的脉冲反馈控制器,实现了对电压反馈型DC-DC buck变换器混沌现象的控制。最终通过理论分析、数值计算及电路仿真证实了该方法的正确性及有效性。上述研究结果有助于加深对电路系统动力学特性的认识与理解,对优化系统参数、提高系统性能具有理论和实用价值。
The chaos control in the DC-DC circuit has great application value in the practical engineering. The generating mechanism of chaos and the advantages and disadvantages of its control method are studied,the mechanism of the chaos in the DC-DC buck converter from the energy transfer view is analyzed,and the main reason for generating chaos pointed out that the energy of the system is increasing. Based on the above analysis,the method of current of inductor is used to construct the feedback controller to control the chaos in the DC-DC Buck converter.Theoretical analysis,numerical calculation and circuit simulation demonstrate the effectiveness and validity of this chaos control.
出处
《电子科技》
2014年第9期143-147,共5页
Electronic Science and Technology
