Indirect Sliding-mode Digital Control for DC-DC Cuk Converter

This article explains indirect sliding mode control (SMC) that can be used on Cuk converters. Unlike standard SMC approaches, the proposed indirect SMC approach uses only the input current error to determine sliding surface functions. Implementation is made easier and more affordable with the help of a sliding surface function. It is demonstrated that indirect regulation of the output voltage is possible. A proportional-integral (PI) controller provides the input current reference. Existence criteria and the closed-loop system region are established for all PI gain scenarios. The proposed SMC method is tested on Matlab/Simulation in order to determine whether it can keep the voltage stable when the input voltage and load resistance change suddenly. The outcomes of the simulation results are presented and discussed.