A second order sliding mode controller for the Flyback converter

This paper presents a second order sliding mode (SOSM) controller for a Flyback converter. The advantages of SOSM controller are relatively easy to implement, get fast dynamic response and robustness. Moreover, the SOSM controller reduces the chattering effect of traditional first-order sliding mode controller. The super-twisting sliding mode algorithm, does not require the derivative value of output error, was used in this paper. In addition, a fully digital Flyback converter is implemented on a microprocessor which performs the super-twisting algorithm to simplify the hardware circuits. Finally, simulation results validated the feasibility and performance of the proposed system.