Sliding mode controlled quadratic boost converter

This paper deals with a quadratic boost converter which belongs to cascade boost family, controlled by sliding mode controller. In the cascade boost family, quadratic boost converter is the best trade-off when circuit complexity and modulator saturation is considered. Sliding mode control being a nonlinear control results in a robust and stable system when applied to switching converters which are inherently variable structured systems. The stability of this system is analysed through Lyapunov´s approach. Analysis is done for load regulation, line regulation and step response of the system on Simulink model. Also these results are compared with that of PID controller based system.