Indirect Vector Control of Induction Motor with on Line Rotor Resistance Identification

Abstract

Vector Control (VC) has been accepted as one of the most effective methods for the control of induction motor drives. The decoupling of flux and the electromagnetic torque obtained by Indirect Field Oriented Control (IFOC) depends on the precision of slip calculation; witch depends strongly to rotor resistance value. However, rotor resistance varies with temperature, frequency. In this paper, the authors present a Matlab-Simulink based simulation of a high performance induction motor indirect field oriented control witch is robust against rotor resistance variations. These variations are tracked using the Extended Kalman Filter (EKF) algorithm. The on line estimated rotor resistance actual value is fed forward to the slip speed calculation module to obtain robust control performance with the proposed indirect field-oriented control scheme