<abstract xmlns="http://www.w3.org/1999/xhtml">This paper deals with the stability problem of three stator current error-based estimators of induction motor speed, especially in the regenerating operation mode. The stability of the adaptive full-order observer (AFO) and two model reference adaptive systems (MRASs) based on a stator current error (MRASCCand MRASCV) is briefly analysed, and the stability borders are determined and compared. It is shown that MRASCVspeed estimator is stable in the whole operation range including the regenerating mode without any modifications. The stability enhancement method for AFO and MRASCCestimators is described, and the solution for their stability improvement is proposed. Torque-speed characteristics of the analysed MRAStype estimators in a wide range of drive speed and load torque changes are given, as well as the behaviour of estimators during transients is compared. The theoretical analysis and simulation test results are validated by experimental tests.</abstract>

This paper deals with the stability problem of three stator current error-based estimators of induction motor speed, especially in the regenerating operation mode. The stability of the adaptive full-order observer (AFO) and two model reference adaptive systems (MRASs) based on a stator current error (MRASCCand MRASCV) is briefly analysed, and the stability borders are determined and compared. It is shown that MRASCVspeed estimator is stable in the whole operation range including the regenerating mode without any modifications. The stability enhancement method for AFO and MRASCCestimators is described, and the solution for their stability improvement is proposed. Torque-speed characteristics of the analysed MRAStype estimators in a wide range of drive speed and load torque changes are given, as well as the behaviour of estimators during transients is compared. The theoretical analysis and simulation test results are validated by experimental tests.

Comparative Stability Analysis of Stator Current Error-based Estimators of Induction Motor Speed

Power Electronics and Drives

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

This paper deals with the stability problem of three stator current error-based estimators of induction motor speed, especially in the regenerating operation...

Comparative Stability Analysis of Stator Current Error-based Estimators of Induction Motor Speed

Article Category: Special Section on Sensorless Drives

Published Online: Nov 17, 2018

Page range: 187 - 203

Received: Jan 12, 2018

Accepted: Apr 26, 2018

DOI: https://doi.org/10.2478/pead-2018-0010

Keywords
induction motor, MRAS-type estimators, stability, regenerating mode

© 2018 Mateusz Korzonek, Teresa Orłowska-Kowalska, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Comparative Stability Analysis of Stator Current Error-based Estimators of Induction Motor Speed

Article Category: Special Section on Sensorless Drives

Published Online: Nov 17, 2018

Page range: 187 - 203

Received: Jan 12, 2018

Accepted: Apr 26, 2018

DOI: https://doi.org/10.2478/pead-2018-0010

Keywordsinduction motor, MRAS-type estimators, stability, regenerating mode

© 2018 Mateusz Korzonek, Teresa Orłowska-Kowalska, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Keywords
induction motor, MRAS-type estimators, stability, regenerating mode