Buck-Boost变换器的无源滑模控制研究

为解决无源性控制时Buck-Boost变换器电压与电流过冲的问题，在无源性控制的基础上加入滑模控制。通过建立Buck-Boost变换器的欧拉-拉格朗日(E-L)模型，可以得到Buck-Boost变换器的无源性控制规律。在此基础上，结合滑模控制原理，设计Buck-Boost变换器的无源滑模控制器。在Matlab环境下，进行Buck-Boost变换器无源滑模控制的动态仿真。仿真结果表明，Buck-Boost变换器的无源滑模控制对电源扰动、负载扰动具有很强的鲁棒性，且动态响应速度快，能够解决无源性控制电压与电流过冲的问题。

Analysis on the Passivity and Sliding-mode Control of the Buck-Boost Converter

In order to solve the voltage and current overshoot of the passivity control of the Buck-Boost converter, the passivity control is combined with the sliding-mode control.The passivity control rule of the Buck-Boost converter is got by founding the Euler-Lagrange model. On this basis, the passivity and sliding-mode controller of the converter is designed.. In the Matlab environment, the dynamic simulation of passivity and sliding-mode control for the Buck-Boost converter is made. The simulation results demonstrate that the voltage and current overshoot of the passivity control is solved by combining the passivity control with the the sliding-mode control. Also the Buck-Boost converter has very strong robustness for disturbance caused by power source change and load change and responses fastly.