Performance evaluation of fractional order controller for induction machine control and comparative study between FOC PI & FOC FOPI

The modeling and the control of the physical systems have experienced remarkable growing as soon as the fractional calculation appeared. In this research work, the Field Oriented Control FOC of the asynchronous machine is processed using fractional PI controllers firstly for current loops and on the other hand for speed loop. This type of control is recommended, since it accepts for their design additional degrees of freedom, to solve the problem of the complexity of this industrial system: the uncertainty of the electrical or mechanical parameters under the effect of the temperature and the improvement of the performances, robustness and stability of the system. The fractional order introduces a nonlinearity gives a better fit for the operation of the regulation. The FMINCON toolbox of Matlab is used to obtain the required values ki, kp and α.