An Improved Field-Oriented Control Strategy for Permanent Magnet Synchronous Motor Drives

Permanent magnet synchronous motor (PMSM) drive systems are increasingly vital in manufacturing, industrial, and transportation operations. The control requirements for these systems always demand high standards of fast response and accurate tracking. In this study, a non-cascaded control structure with high disturbance rejection ability is proposed for PMSM drives. Traditional structures like the field-oriented control strategy for PMSM systems still have numerous drawbacks due to their cascaded control approach. Moreover, applying traditional control methods when designing controllers for PMSM often results in subpar system performance, especially in terms of resilience to disturbances. In this research, a non-cascaded control model is developed for PMSM systems, taking into account the influence of disturbances. The effects of unknown disturbances are estimated and eliminated online through feedforward compensation techniques. Additionally, to address the limitations imposed by traditional control structures, the controller in this study is redesigned with an improved reaching law. This compound control method (referred to as CCM) brings numerous advantages by achieving high dynamic performance and precise tracking for PMSM drives. The effectiveness of the CCM controller in this study is evaluated through simulations. The results confirm the robustness, enhanced performance, and high reliability that the CCM method brings to PMSM systems.