Enhanced Sensorless Field Oriented Controlled PMSM Drive Using Fractional Calculus and PSO Technique

An enhanced fractional order PI (FOPI
^α
) controller is proposed for the model reference adaptive system (MRAS) vector control method of the permanent magnet synchronous motor (PMSM). FOPI
^α
controller parameters and fractional factor mainly affect the controller performance, hence they should not be selected randomly. Particle swarm optimization technique (PSO) is used to tune these parameters. The proposed FOPI
^α
controller has the merit of improving the field-oriented control (FOC) method of the sensorless FOC PMSM drive by proper design of the speed controller, current controllers and MRAS controller. The proposed methodology is tested using MATLAB Simulink simulation and the results validate perfect performance even at very low speed.