【摘要】 电流控制模式的Buck—Boost换流器电路在一定的参数范围内会出现分岔和混沌,研究这些非线性现象的机理及参数范围在理论和电力电子的应用上都非常重要。采用最近提出的基于轨线的非线性动力学方法,在一维观察空间中定义换流器轨迹结构稳定性的稳定裕度,解释了发生分岔及混沌的机理,并用灵敏度分析技术快速估计各分岔点。更多还原

【Abstract】 Bifurcation and chaos might occur in the current-mode controlled Buck-Boost DC-DC converter under certain ranges of circuit parameters. Researches on the mechanism and parameter range of these nonlinear phenomena are significant in both theory and applications. By using the trajectory-based nonlinear dynamics analysis method, the stability margin of the trajectory structure is defined. The margin varies with control parameters, therefore the period-doubling bifurcations can be quickly predicted with sensitivity techniques, and the mechanism of the bifurcation and chaos behaviors can be well explained.更多还原