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 ($ MRAS^{CC} $and $ MRAS^{CV} $) is briefly analysed, and the stability borders are determined and compared. It is shown that $ MRAS^{CV} $speed estimator is stable in the whole operation range including the regenerating mode without any modifications. The stability enhancement method for AFO and $ MRAS^{CC} $estimators is described, and the solution for their stability improvement is proposed. Torque-speed characteristics of the analysed MRAStype estimators in a wide range of drive speed and load torque changes are given, as well as the behaviour of estimators during transients is compared. The theoretical analysis and simulation test results are validated by experimental tests.
Comparative Stability Analysis of Stator Current Error-based Estimators of Induction Motor Speed
Power Electronics and Drives ; 3 , 1
2018
Article (Journal)
English
BKL: | 53.35 Stromrichter, Transformatoren / 53.33$jElektrische Maschinen und Antriebe / 53.33 Elektrische Maschinen und Antriebe / 53.35$jStromrichter$jTransformatoren |
Stator Flux Orientation Based Model Predictive Current Control of Induction Motor
Springer Verlag | 2022
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