Research On Modeling And Control Method Of DC-DC Switching Converter

In recent years,with the rapid development of electronic information industry,DC-DC switching converter is widely used in many fields.The research of DC-DC switching converter modeling and control method has become an important research content of power electronic technology.In this thesis,the working principle of Buck converter and Boost converter is introduced in detail,and the state space averaging method is used to establish the mathematical model of the Buck converter under the condition of continuous inductor current.Using the mathematical model,a fuzzy sliding mode control method based on equivalent control is designed for Buck converter.The detailed design process is given,and the numerical simulation is carried out to verify the feasibility of the method.Finally,a sliding mode control method based on high gain observer is designed for Buck converter.At the same time,the detailed design process is given.The stability is proved by using the Lyapunov function,and the effectiveness and superiority of the method are verified by computer simulation.According to the characteristics of Buck converter,the fuzzy sliding mode control method of Buck converter and the sliding mode control method based on high gain observer are proposed,and the effectiveness of the method is verified by simulation,which provides a good reference for the control technology of the DC-DC converter.