SPEED ESTIMATION FOR THREE PHASE INDUCTION MOTOR USING ROTOR FLUX OBSERVER

Abstract

In recent years, sensorless induction motor drivers have been neglected due
to the reasonable cost, compact size, high reliability. Speed estimation
algorithms are substituted for direct speed measurement systems using
tachometers or encoders. This paper describes a method of sensorless speed
estimation of three-phase induction motor based on Rotor Flux Observer. The
simulation results obtained using Matlab/Simulink show that the estimated
motor speed always tracks the actual motor speed with very small error.