A novel finite element controller map for intelligent control of induction motors

This paper proposes a new intelligent control for an indirect vector controlled induction motor drive for high performance, based on a finite element controller map. The traditional basic conventional algorithm (PI controller) has been successfully used to obtain decoupling control between the rotor flux and the torque. The basic PI has fixed gains that cannot be increased beyond certain limits. In addition, a conventional PI controller is very sensitive to parameter variations. When it is applied to load perturbation, it shows steady state error, sluggish response and poor convergence characteristics. To overcome these difficulties, a new intelligent control technique for induction motor drive based on a Finite Element Controller Map (FECM) is introduced. This technique can have sharp local gradients, which means it can be highly adaptive. In order to evaluate the performance and test the ability of the algorithm, several tests are performed under a wide range of operating conditions such as a sudden change in command speed or load perturbation, using MATLAB/SIMULINK. Results are compared with those obtained by other algorithms previously reported in the literature.