State Estimation in Induction Motors Using the Closed Loop Observers

Year 2019, Volume: 3 Issue: 2, 9 - 19, 25.12.2019

Mehmet Bolat , Saadettin Aksoy

Abstract

This paper presents an estimation technique for the
state variables of a three phase squirrel-cage induction motor such as stator
current and, rotor flux components. Closed loop observers, which can be
classified as full-order and reduced-order observers, are used for estimation.
In observer design, the state-space d-q axis model of induction motor is used.
Estimation algorithms given for either observer are implemented by using MATLAB
software.

In the estimation algorithms, some results for
different observer gain matrices are obtained from input/output data of the
state-space simulation of induction motor supplied by sinusoidal voltage
sources.

It is shown that estimation results are compatible
with the simulation results of induction motor.

Keywords

Induction Motor, Closed-Loop Observer, Full rank observer

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