DC-DC buck变换器的分岔行为及混沌控制研究

Research on bifurcation behaviour and chaos control in DC-DC buck converter

研究了带负载电容的DC DCbuck变换器的分岔行为及其混沌控制问题 ,提到了一些新的有意义的结果 .随着负载电容的增加 ,这种电路系统出现周期叠加序列窗口 ,且系统混沌运动的参数空间的测度逐渐趋于零 ,而且系统处在周期运动区时其电压转换效率高于系统处在混沌运动区时的电压转换效率 ,这些结果对于实际电路的设计具有较好的参考价值 .同时 ,采用外加周期脉冲控制方法 ,能有效地实现该电路系统中的混沌控制 .

In this paper,the bifurcation behaviour and chaos control are investigated for a DC DC buck converter with load capacitor.Some valuable new results are obtained,e.g.,the periodicity adding windows are found in this circuit system and the measure of chaotic motion is found to converge to zero asymptotically increasing load capacitance.Moreover,it is found that the transform ratio of voltage for periodict motion is higher than that for the chaotic motion in the buck converter.These results have some applications for designing practical circuits.At the same time,chaotic behaviours of this circuit system can be effectively controlled by applying suitable periodic impulses to the system.