【摘要】 提出了基于闭环电流模式Boost变换器的封闭三维离散时间映射,应用该映射得到了电感电流关于输入电压的分叉图和输出电压的负载特性。通过对分叉图的研究,可以选择合适的参数使闭环电流模式Boost变换器工作在混沌状态,即自激混沌。实验结果表明,闭环电流模式Boost变换器自激混沌抑制EMI的效果良好,在实际负载范围内都能自激混沌,且对输出电压的纹波影响较小。更多还原

【Abstract】 A closed three-dimension discrete-time map of current-mode controlled Boost converter is presented in this paper.We obtain the bifurcation diagram of inductor current to input voltage and load-characteristic of output voltage by this map.By researching this bifurcation diagram,we can make current-mode controlled Boost converter operating in chaos by selecting appropriate parameter.The experiment results demonstrate that current-mode controlled Boost converters in self-excitation-chaos can suppress EMI very well,hardly influence to output voltage ripples,and current-mode controlled Boost converters can operate in self-excitation-chaos in overall load.更多还原