PWM Based Quasi Sliding Mode Control of Buck Converter

摘要

This paper presents the sliding mode control technique with PD type of feedback controller and the design and analysis of a fixed-frequency pulse width modulation based quasi sliding mode voltage controller with PID type of feedback controller for buck converter. A practical design approach that aims at systematizing the procedure for the selection of the control parameters is presented. The robustness of the controller is discussed with line variation and load variation analysis. In addition, a simple method of implementing the proposed adaptive control strategy is discussed to reduce the line variations. Simulation results show satisfactory performance of the proposed switching converter.