Improved Full-Order Sliding Mode Based on Model Predictive Flux Control for LIM Applied to Urban Transit

This article proposes a full-order sliding mode control (FOSMC)-based finite set-model predictive flux control (FS-MPFC) to enhance the dynamic response in the whole speed range of the linear induction machine (LIM). First, the FS-MPFC method is designed to reduce the associated limitations of the traditional finite set-model predictive based on thrust control (FS-MPTC) method in terms of complex tuning problem of weighting factor (WF) and many steps of the calculation process. Second, the FOSMC for the speed loop is developed using the FS-MPFC method to achieve faster transient response and high tracking ability with lower thrust and flux ripples. The FOSMC-MPFC method is then thoroughly studied, encompassing its basic design methodology, implementation steps, and stability validity. Finally, entire simulations and experimental analyses at different speeds and loads have been conducted on a 3-kW prototype arc induction machine (AIM) to validate the superiority and feasibility of the proposed FOSMC-MPFC method.