船用电流控制型Buck-boost变换器分岔行为分析

Analysis of Bifurcation in Marine Current-mode Controlled Buck-boost Converter

为了分析船用电流控制型Buck-boost变换器的分岔非线性动力学行为,首先推导一种描述船用Buck-boost变换器分岔行为演化过程的非线性迭代映射模型,然后采用雅可比矩阵来确定Buck-boost变换器首次出现失稳的分岔点,最后进行了不同分岔参数的仿真试验。仿真试验结果表明了理论推导模型的正确性,并且可有效预测首次出现的分岔点。

To explore bifurcation of nonlinear dynamics in marine current-mode controlled Buck-boost converter,firstly,the nonlinear iterated mapping model of bifurcation evolution for Buck-boost converters is deduced.Then the Jacobian matrix has been used to identify the first instable bifurcation point.At last,we make a serious of experiments of different bifurcation parameters.The simulation results are given to verity the deduced model,which are very useful for the prediction of the first bifurcation point in the converter.Experimental results are given to verify the analysis.