This paper designs a fractional order PID direct torque control strategy for permanent magnet synchronous machine (PSMS) based on on fractional calculus. The fractional order controller to control the speed of the machine was synthesized, referring to Bode's ideal transfer function. In the controller, the fractional order integrator was approximated by Charef's method. The fractional PID order control was compared with classical PID control, showing that the former has the better accuracy and robustness. Finally, MATLAB/ SIMULINK simulation proved the advantages of our control strategy under oscillating torque load or magnetic field.

The aim of this study is to present a Switched Reluctance Motor (SRM 6/4) design and control. The use of numerical model for the design of the SRM gives better results compared to the simplified analytical model. The application of the Modified Direct Torque Controller (MDTC) to SRM significantly improves effectiveness of static and dynamic performance compared to field-oriented control and direct torque control, especially in decreasing torque ripple. Finally, the use of a fractional order controller PI a D b allowed the elaboration of a new model on DTC of SRM. The results obtained show a significant performance improvement compared to the classical controller method.