【摘要】 该文将DC-DC变换器视为一类典型的混杂动态系统,即切换线性系统,引入切换线性系统的一种新的数学建模方法——矩阵系数多项式插值建模法对基本的DC-DC变换器进行建模。建立了DC-DC变换器线性切换系统的连续部分与离散部分联系的显式描述形式,得到一个离散变量与连续变量直接相互作用的数学模型。该矩阵系数多项式模型从某种程度上更深入地揭示了DC-DC变换器切换线性系统的运行本质,并且对系统的性能分析产生一定的作用。稳态分析和瞬态闭环仿真的结果均验证了该新型模型的实用性。更多还原

【Abstract】 DC-DC converters are con- sidered to be one type of hybrid dynamic systems- switched linear systems. A new mathematical model of switched linear system matrix coefficient polynomial description model is presented. An obvious description form of the relationship between the continuous part and discrete part is built,a new model of switched linear system of DC-DC converter, in which continuous variable and discrete variable interact on each other directly, is given. To some extent, the new model helps to reveal the essence of operation activity and analyze the performance of DC-DC converter. Both the results of steady-state analysis and closed-loop simulation of transient response have certified the practicability of the new model.更多还原