开关电感Buck-Boost变换器的非线性行为控制研究

摘要

The current-mode controlled switched-inductor Buck-Boost converter was chosen as the research object. Through numerical simulation,the bifurcation diagram,the Poincare section diagram,the largest Lyapunov exponent and the Jacobian matrix eigenvalue of this circuit system were shown here. The switched-inductor Buck-Boost converter circuit system nonlinear behavior and the case of chaos were analyzed ,and stability criterion of circuit system was deduced. For the first time,the parametric perturbation method was applied to control the nonlinear behavior in switched-inductor Buck-Boost converter. At the same time,pertubation amplitude and pertubation phase angle were calculated. Finally,the corresponding Matlab/Simulink simulation and experimental circuit validation were done. The result shows that the chaos of the circuit system can be reduced efficiently by the parametric perturbation method.%以电流模式控制开关电感Buck-Boost变换器为研究对象,通过数值仿真得到了电路系统的分岔图、庞加莱截面图、最大Lyapunov指数、雅可比矩阵特征值,分析了变换器电路系统非线性行为及混沌产生的原因,推导出了电路系统的稳定判据.首次采用参数微扰法对开关电感Buck-Boost变换器的非线性行为进行了控制,并计算了扰动强度和扰动相位.最后进行了相应的Matlab/Simulink仿真和实验电路验证,实验结果与仿真结果一致.研究结果表明,采用参数微扰法可有效抑制电路系统的混沌.