Integral Sliding Mode controllers for SEPIC converters

This paper presents different aspects involved in the application of fixed frequency Sliding Mode Control (SMC) to the DC-DC Single-Ended Primary Inductor Converter (SEPIC). The choice and influence of the sliding surface regarding the state vector are presented. Simulation results show that a sliding surface composed of the single integral of system's state variables gives steady-state errors whereas the insertion of double integral of state variables stabilizes and improves the converter's performance. Experimental validation is also provided.