一种基于PWM的新型滑模控制器在BUCK变换器中的仿真研究

介绍了滑模控制理论及其在Buck变换器中的仿真研究,提出了一种新型滑模控制器的设计方法,该方法与传统设计方法的不同之处是在三维空间中设计滑模面,该设计方法充分考虑了Buck中各元件的信息.Buck变换器工作在CCM模式下,计算出该方法的滑模可达性条件及其控制器方程,并论述了该种方法的稳定性.最后采用SIMUUNK对该控制器在Buck电路中的应用进行了仿真,通过仿真结果论证了变换器的相关理论,证明了该种方法的可用性.

Research of a PWM-based New Sliding-mode Controller in the BUCK Converter

This paper introduces the sliding mode control theory and the simulation on the Buck converter and puts forward a new method for designing the sliding mode controller. The difference between the new method and the common methods is that the controller is designed in the three-dimensional space. The information of all elements in the Buck circuit is considered adequately. When the Buck converter is working in the CCM mode, accessibility condition of the sliding mode and the controller's equation are calculated of the sliding mode, the stability of this method is discussed. The application of the controller in the Buck converter is simulated by the SIMULINK, the correlative theory of converter is demonstrated by the simulation result, the usability of this new method is also testified.