通过建立含斜坡补偿的分段光滑迭代映射方程,导出了电流控制型Buck变换器运行轨道状态发生转移时的两个分界线方程,由此确定了其工作状态的区域.Buck变换器参数空间映射图的仿真结果验证了由两个分界线方程估计其工作状态域的正确性.开关变换器工作状态域的估计对电路参数的合理选择以及混沌的镇定控制有着实际的指导意义.
With the variations of circuit parameters,the operating state of current mode controlled buck converter by utilizing compensating ramp current can shift between stable period-one region,robust chaos region in continuous conduction mode(CCM) and intermittent chaos region in discontinuous conduction mode(DCM).By establishing the piecewise smooth iterative map with ramp compensation,two borderline equations of the orbit states shifting of current mode controlled buck converter are derived,and the corresponding operating state regions are decided. The simulation results of the parameter space map of buck converter verify the estimated operating state regions by two borderline equations. The estimation of operating state regions for switching converter has practical guideline signification for selection of circuit parameters as well as stability control of chaos.