输入电压纹波对并联buck变换器分岔和混沌的影响  

Effect of input voltage ripple on the bifurcation and chaos in parallel-connected buck converters

作　　者：谢玲玲[1] 高善明[1] 龚仁喜[1] 黄阳[1] 

机构地区：[1]广西大学电气工程学院,广西南宁530004

出　　处：《广西大学学报（自然科学版）》2015年第6期1438-1446,共9页Journal of Guangxi University（Natural Science Edition）

基　　金：广西自然科学基金资助项目(2014GXNSFBA118277);广西大学科研基金资助项目(XJZ130353);广西高校大学生创新创业计划项目(201410593080)

摘　　要：文中从纹波峰值、纹波的谐波阶数及初始相位角三方面深入研究了输入电压纹波对均流控制的并联buck变换器分岔和混沌行为的影响,并与输入电压不含纹波时的情况进行比较分析。结果表明,输入电压含纹波时的系统分岔图呈现扩展的带状结构,相应的庞加莱映射为环状结构,状态变量的时域波形在较长时间内表现为周期性谐波和次谐波振荡。可见输入电压纹波对系统的稳定性有较大的影响。实验也验证了理论分析和仿真结果的正确性。The effect of input voltage ripple on the bifurcation and chaos in a parallel-connected buck converter under current sharing control has been explored from the aspects of its peak value,the order of the harmonic and the initial phase angle. A comparison between the input voltage with and without ripple has been carried out. It is found that an expanding band-like structure can be observed in the bifurcation diagram,and a loop-type structure exists in the corresponding Poincarémapping. The time-domain waveforms of the state variables display periodic harmonic and sub-harmonic oscillation in long span,which shows that the input voltage ripple has great effect on the stability of the system. The correctness of the theoretical analysis and simulation is verified by experiments.

关 键 词：并联buck变换器 分岔 混沌 纹波 

分 类 号：TM464[电气工程—电器]