Improved Predictive Torque Control for SRM Drives Based on a Global Integral Sliding Mode Speed Controller With Extended State Observer

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This paper proposes a novel dual-loop control strategy to comprehensively improve the torque and speed performance of switched reluctance motor (SRM) drives. For the torque control loop, a predictive torque control with sector adaptive allocation technology (PTC-SAAT) is designed to suppress torque ripple and eliminate negative torque. For the speed control loop, a global integral sliding mode speed controller enhanced by an extended state observer (GISMSC-ESO) is proposed, integrating a global sliding surface for robust tracking, an improved exponential reaching law (IERL) for chattering suppression, and an extended state observer (ESO) for real-time disturbance compensation. The two loops are cascaded to form a cohesive control architecture. Simulation and experimental results demonstrate that the proposed PTC-SAAT-GISMSC-ESO algorithm achieves superior dynamic and steady-state performance: it provides at least 11% faster speed response and approximately 15% reduced speed-loop chattering compared to traditional methods, while simultaneously maintaining low torque ripple and strong robustness against load and speed variations.

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