FUZZY LOGIC BASED STATOR RESISTANCE ESTIMATOR FOR A DIRECT TORQUE CONTROLLED THREE-PHASE INDUCTION MOTOR
MUTHANNA JOURNAL OF ENGINEERING AND TECHNOLOGY (MJET)
Research Article:
Turki Y. Abdulla, University of Basrah – College of Engineering – Department of Computer Engineering
Haroution A. Hairik, University of Basrah – College of Engineering – Department of Computer Engineering
Adel M. Dakhil, University of Misan-College of Engineering-Department of Electrical Engineering
E-mail addresses: Turkey@yahoo.com, haroution@gmail.com, dr.adelmanaa@yahoo.com
ABSTRACT
Direct torque control (DTC) of three phase induction motor uses the motor stator resistance to
estimate the stator flux. The variation of stator resistance due to changes in temperature or
frequency deteriorates the performance of DTC controller by introducing errors in the estimated
flux linkage and the electromagnetic torque. A fuzzy based stator resistance estimator during the
operation of the motor is proposed. By means of comparing the actual current and the reference
current, the change of stator resistance can be estimated. The estimation method is implemented
using fuzzy logic control schemes. Simulation results obtained clearly demonstrate the effectiveness
of the estimator in estimating the stator resistance and improving performance of DTC.