Lyapunov-function-based flux and speed observer for AC induction motor sensorless control and parameters estimation
Vaclavek, P.
Blaha, P.
Center for Appl. Cybern., Brno Univ. of Technol., Czech Republic;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Feb. 2006
Volume: 53,
Issue: 1
On page(s): 138- 145
ISSN: 0278-0046
INSPEC Accession Number: 8765372
Digital Object Identifier: 10.1109/TIE.2005.862305
Current Version Published: 2006-02-06
Abstract
AC induction motors have become very popular for motion-control applications due to their simple and reliable construction. Control of drives based on ac induction motors is a quite complex task. Provided the vector-control algorithm is used, not only the rotor speed but also the position of the magnetic flux inside the motor during the control process should be known. In most applications, the flux sensors are omitted and the magnetic-flux phasor position has to be calculated. However, there are also applications in which even speed sensors should be omitted. In such a situation, the task of state reconstruction can be solved only from voltage and current measurements. In the current paper, a method based on deterministic evaluation of measurement using the state observer based on the Lyapunov function is presented. The method has been proven in testing on a real ac induction machine.
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