【摘要】 针对DC/DC开关变换器的非线性控制问题,在电流连续型Buck变换器仿射非线性模型的基础上,通过非线性坐标变换,得到其标准链式结构,采用非线性系统无源化方法设计出系统的反馈镇定控制器,得到了一种无源化控制方案。仿真结果表明,所设计的控制器对负载扰动具有很强的鲁棒性,且控制器简单易实现,实现了对Buck变换器中电感电流和电容电压的有效控制。更多还原

【Abstract】 For the nonlinear control problem of DC/DC converter,based on an affine nonlinear model of current conduction mode Buck converter,the standard chain type structure is derived by nonlinear coordinate change.Then a kind of passivity control scheme was got by the passivity method of nonlinear system being used to construct the stable feedback controller.The results of simulation show that the controller has very strong robustness for disturbance caused by load change and it is simple and easy to implement.It is effective to control the current of conductor and the voltage of capacitor in Buck converter.更多还原