An Enhanced Finite-Set Model Predictive Control Based Super Twisting Sliding Mode Speed Controller for Linear Metro Applications

The tracking speed issue of linear induction machines (LIMs) is addressed in this study via a nonlinear speed controller with model predictive current control (MPCC). The super twisting sliding mode controller (STSMC) controls the LIM speed instead of the traditional PI controller to provide a quick dynamic response with a smaller steady-state inaccuracy. The primary objective of the super twisting sliding mode controller (STSMC) is to regulate the q-axis primary current within the finite-set MPCC (FS-MPCC) framework. To avoid the use of an axis transformation problem and speed up the calculation process, the dynamic model of the suggested STSMC-based FSMPCC is fulfilled in the $\alpha \beta$ frame rather than the $dq$ frame. The suggested control technique is validated by simulation results based on the platform of two 3 kW arc induction motor drive systems.