Fractional Order Sliding Mode Control of PMSM Based on Improved Generalised Super-Twisting Algorithm

A fractional-order sliding mode speed control strategy based on the improved generalized super-twisting algorithm (FO-IGSTA-SMC) is proposed for the Permanent Magnet Synchronous Motor (PMSM), which is sensitive to load disturbances and parameter variations. First, the PMSM motion equation is utilized to construct the fractional-order sliding mode surface according to its speed error. Second, fractional-order sliding mode control (FOSMC) is combined with the improved generalized super-twisting algorithm (IGSTA) to mitigate chattering phenomenon and enhance system robustness. Finally, the effectiveness and feasibility of the proposed strategy are validated through simulations.