摘要
首先建立了电流反馈型Buck-Boost变换器在连续导电模式和不连续导电模式下的离散迭代数学模型,根据稳定性判据得出系统的稳定工作区域。在反馈系数K、输入电压Vin、电感L等为分岔参数作用下,利用数值方法对Buck-Boost变换器中的非线性行为进行了详细的仿真研究。仿真研究和理论分析的结果吻合得很好,研究结果表明:Buck-Boost变换器在这两种工作模式下都是强非线性的,运行时会呈现出分岔、混沌等非线性现象。
The discrete iterative map modes of current-mode controlled Buck-Boost converters in continuous conduction mode（CCM） and discontinuous conduction mode（DCM） are derived.The stable operation regions of the system are obtained according to the stability criteria.The nonlinear phenomena of the Buck-Boost converter operating in CCM and DCM have been investigated,with feedback coefficient K,input voltage Vin and inductor L as bifurcation parameters.The computer simulations are in agreement with the theory analysis.The research results show that the Buck-Boost converters are strongly nonlinear,a lot of nonlinear phenomena such as bifurcation and chaos can be observed in CCM and DCM.
出处
《电测与仪表》
北大核心
2010年第12期4-7,共4页
Electrical Measurement & Instrumentation
基金
国家自然科学基金自助项目(60962008)
