A NOVEL SPEED ESTIMATION ALGORITHM IN INDIRECT VECTOR CONTROLLED INDUCTION MOTOR DRIVE

J.S. Thongam and M. Ouhrouche

Keywords

Induction motor, vector control, reducedorder observer, speed estimation

Abstract

A rotor speed estimation algorithm in an indirect vector controlled (VC) induction motor drive is proposed. The proposed method is based on observing a newly defined quantity which is a function of rotor flux and speed. A reduced-order observer is used to estimate the new quantity from which the rotor speed is computed. The method is simple to implement and does not require taking derivative of the measured signals. Simulation is carried out to verify the accuracy of the estimation algorithm.

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