Sliding Mode Control of Buck Converter Using ESO

Buck converter is a buck DC/DC converter. In this paper, an improved control algorithm based on traditional sliding mode control and ESO is proposed for Buck converter, which is affected by some uncertain external factors, such as sudden change of load and variation of reference voltage, in order to meet the needs of high-power voltage conversion occasions. The improved control algorithm firstly evaluates the state, input voltage and load of the whole system, and then uses sliding mode control to improve the overall performance of the system. Finally, the mutation of reference voltage and load is carried out on MATLAB/SIMULINK to verify the feasibility of the improved control algorithm. The simulation results show that compared with the traditional sliding mode control, the proposed control algorithm can increase the system responsiveness and improve the overall performance of the system compared with the traditional control methods.