Buck 开关变换器混沌和分岔现象研究

摘要

电力电子电路与系统中普遍存在着分岔和混沌现象。论文对于工作在电流连续模式下的 Buck 变换器通过离散迭代映射建立非线性动力学模型。通过 Matlab／Simulink 仿真，从时域图相图及庞加莱截面图的角度对变换器中的分岔和混沌行为进行分析。改变参数，对系统时域图相图，庞加莱截面及根轨迹分布进行分析，对系统混沌分岔行为进行仿真，分析了参数变化时系统的稳定性。%Bifurcation and chaos ususally exist in power electronic circuits and systems .In this paper ,for the Buck con-verter in continuous current mode by discrete iterative map to establish nonlinear dynamics model ,through the Matlab/Simu-link simulation ,analysis of bifurcation of converter from time drawing phase diagram and Poincare section angle and chaotic behavior .Changing the parameters of system time domain diagram ,phase diagram ,Poincare section and the root locus dis-tribution are analyzed ,the simulation of the system is chaotic bifurcation ,stability analysis of system parameters change .