Fuzzy logic based rotor resistance estimator of an indirect vector controlled induction motor drive

A simple method for estimating rotor resistance in an indirect vector-controlled induction motor drive is proposed in this paper. The proposed rotor resistance estimator which uses fuzzy logic principle is based on the improvement of control performance when mismatch between estimated rotor resistance and actual one occurs. Analysis, design, and digital simulations are carried out to demonstrate the effectiveness of the proposed estimator. Moreover, simplicity and direct approach for estimating the rotor resistance are other significant features for the described method.