A stator resistance estimatos based on a fuzzy control theory

This paper presents a kind of direct torque control with a stator resistance estimator for an AC motor speed-governing system based on fuzzy logic control.The estimator is simple in construction and the error of stator resistance is small.The simulation result shows that the system consisting of the estimator boasts a fast response,small torque ripple and good robustness.It has been used in the speed control of revolving components,which are working at a low speed.