峰值电压反馈Superbuck变换器中分岔与混沌的实验研究  

Experimental Study of Peak Voltage Feedback Superbuck Converter in Bifurcation and Chaos

作　　者：毕闯[1,2] 张千[1,2] 向勇[1,2] 冯雪松[1,2] 

机构地区：[1]电子科技大学电子薄膜与集成器件国家重点实验室,成都610054 [2]电子科技大学能源科学与工程学院,成都611731

出　　处：《电子与信息学报》2013年第9期2261-2265,共5页Journal of Electronics & Information Technology

基　　金：电子薄膜与集成器件国家重点实验室基础研究开放创新基金(CXJJ2010001)资助课题

摘　　要：该文针对太阳能光伏发电系统中一种重要的拓扑结构Superbuck变换器进行非线性动力学研究。根据变换器的状态方程,采用频闪映射方法得到变换器的离散映射模型,然后以参考电压为分岔参数得到电感电流的分岔图。最后通过建立实验电路来研究变换器的非线性动力学行为,验证系统从稳定到倍周期分岔直至混沌态的演化过程,同时通过分析电感电流的功率谱图,证明应用混沌技术可以有效地降低系统的电磁干扰(EMI)。The nonlinear dynamics of Superbuck converter is investigated because Superbuck converter is a kind of important topology in the solar photovoltaic power generation system. The discrete mapping model of Superbuck converter is derived by stroboscopic mapping method, based on state equation of the converter. Then the bifurcation diagram of the inductor current is got with the reference voltage as the bifurcation parameter. Finally, the nonlinear dynamics of Superbuck converter is studied by setting up the experimental circuit to verify the whole evolution from stable state to the period-doubling bifurcation state until the chaotic state. On the other hand, ElectroMagnetic Interference （EMI） of the system is effectively reduced through the application of chaos theory by analyzing the power spectra of the inductor current.

关 键 词：Superbuck变换器 混沌 分岔 功率谱图 电磁干扰（EMI） 

分 类 号：TP333.93[自动化与计算机技术—计算机系统结构]