Fractional-order Control Strategies for Power Electronic Buck Converters

Abstract

This chapter presents several alternative methods for the control of power electronic buck converters applying fractional-order control (FOC). For achieving this goal, the controller design will be carried out by two strategies. On the one hand, the design of a linear controller for the DC/DC buck converter will be considered. In that sense, the Bode’s ideal loop transfer function presented in Chapter 2 will be used as reference system. On the other hand, the fractional calculus is proposed in order to determine the switching surface applying a fractional sliding mode control (F_RSMC) scheme to the control of such devices. In that sense, switching surfaces based on fractional-order PID and PI structures are defined. An experimental prototype has been developed and the experimental and simulation results confirm the validity of the proposed control strategies.