A new stator flow-oriented control method based on type-2 fuzzy logic controllers for permanent magnet synchronous motors

Introduction. Stator flow-oriented control is currently the most widely used system in industry or in previous research for improving the quality of mechanical power generated by permanent magnet synchronous motors (PMSM). Problem. However, this control is often based on PI controllers, which have shown problem limitations in terms of performance and robustness. Furthermore, these controllers are not suitable for variable-structure motors, which requires the use of new, more efficient controllers that provide robust control over both internal and external changes, such as type-2 fuzzy logic controllers. The goal of this work is to develop a stator flow-oriented control system by replacing PI controllers with type-2 fuzzy logic controllers that are robust to both external variations, such as changes in torque resistance, and internal variations, such as changes in parameters. Methodology. To implement this control on the PMSM, we maintained the similar structure of stator flow-oriented control, but replaced the PI controllers with type-2 fuzzy controllers. The results of numerical simulations performed using MATLAB/Simulink show that the stator flow-oriented control based on type-2 fuzzy logic controllers achieves an ideal response time and minimal overshoot, with an exponential error close to zero in both the transient and steady states, even with the application of external variations such as resistive torque or changes to the machine’s parameters. The scientific novelty of this work lies in replacing all the controllers in the stator flow-oriented control system with type-2 fuzzy controllers and their programming method, thus addressing the shortcomings of traditional methods. In addition, a rare type of comparative study is presented, thanks to which the effectiveness and robustness of the developed control method relative to other can be demonstrated. Practical value. The excellent results obtained with the new stator flow-oriented control method using type-2 fuzzy logic controllers suggest that it should be taught in academic circles and applied in industry. References 30, tables 3, figures 5.