<abstract xmlns="http://www.w3.org/1999/xhtml"><p> In this paper an exact discrete-time model of the induction motor in a current-fed mode, including stator flux components is derived and validated. The equations of the motor are written in a frame aligned with the rotor electrical position, which results in a linear, time-invariant system. Based on the derived exact discrete-time representation of the motor dynamics, an input-output linearizing control law is designed for decoupled torque and stator flux control. The applied design technique led to a non-trivial, still useful, definition of the electromagnetic output of the motor. Simulation results are presented showing that the aimed performance is obtained, that is, no coupling exists between the outputs, and the initial design problem of controlling a nonlinear interacting TITO system is reduced to a problem of controlling two linear and decoupled SISO systems with simple dynamics.</p></abstract>

In this paper an exact discrete-time model of the induction motor in a current-fed mode, including stator flux components is derived and validated. The equations of the motor are written in a frame aligned with the rotor electrical position, which results in a linear, time-invariant system. Based on the derived exact discrete-time representation of the motor dynamics, an input-output linearizing control law is designed for decoupled torque and stator flux control. The applied design technique led to a non-trivial, still useful, definition of the electromagnetic output of the motor. Simulation results are presented showing that the aimed performance is obtained, that is, no coupling exists between the outputs, and the initial design problem of controlling a nonlinear interacting TITO system is reduced to a problem of controlling two linear and decoupled SISO systems with simple dynamics.

Discrete-time modeling and input-output linearization of current-fed induction motors for torque and stator flux decoupled control

Faculty of Automatics, Technical University of Sofia, 8 Kl. Ohridski Str., 1000 Sofia

Cybernetics and Information Technologies

This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

In this paper an exact discrete-time model of the induction motor in a current-fed mode, including stator flux components is derived and validated. The...

Discrete-time modeling and input-output linearization of current-fed induction motors for torque and stator flux decoupled control

Published Online: Apr 09, 2014

Page range: 128 - 140

DOI: https://doi.org/10.2478/cait-2014-0010

Keywords
Input-output linearization, induction motor, discrete-time nonlinear control

© by Stanislav Enev

This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Discrete-time modeling and input-output linearization of current-fed induction motors for torque and stator flux decoupled control

Published Online: Apr 09, 2014

Page range: 128 - 140

DOI: https://doi.org/10.2478/cait-2014-0010

KeywordsInput-output linearization, induction motor, discrete-time nonlinear control

© by Stanislav Enev

This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Keywords
Input-output linearization, induction motor, discrete-time nonlinear control