摘要：Robustness to parameter variations is an important factor that dictates control performance inelectric drives. This paper explores the suitability of fractional order controllers in combatingparametric variations that arise in electric drives. The controller design and performance isillustrated with indirect field oriented control for an induction motor. Using numericalsimulations in MATLAB/Simulink, the control performance of the proposed controller iscompared with a well tuned traditional PID controller when critical motor parameters aresubject to parametric variations about their nominal values. The parametric variations aresubject to change with the ambient environment and passage of operation time, but insimulations the parameters are varied using sudden (step) change. The step change inparameters generates the worst case scenario for the motor under indirect field orientedcontrol. The simulation results are encouraging and indicate that fractional order controllersprovide a promising alternative for the design of robust controllers in electric drivesapplications.
关键词：Induction Motor; Indirect Field oriented control; Fractional order Control; Robust control.
