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Analiza porównawcza zakresów stabilności wybranych estymatorów prędkości silnika indukcyjnego typu MRAS

Korzonek M.

Przegląd Elektrotechniczny

2018

R. 94, nr 5

90--94

W artykule przedstawione zostało porównanie zakresów stabilności estymatorów prędkości MRASCV oraz MRASCC jak również estymatora MRASCC z zastosowaniem metody poprawy stabilności w generatorowym trybie pracy. Analiza teoretyczna potwierdzona została wynikami badań symulacyjnych i eksperymentalnych.

In this article a comparison of stability ranges of speed estimators MRASCV and MRASCC, as well estimator MRASCC with application of stability extension method in regenerating mode was presented. Theoretical analysis was validate by simulation and experimental result.

Comparative stability analysis of stator current error-based estimators of induction motor speed

Korzonek M., Orłowska-Kowalska T.

Power Electronics and Drives

2018

Vol. 3 (38), No. 1

187--203

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 (MRASCC and MRASCV) is briefly analysed, and the stability borders are determined and compared. It is shown that MRASCV speed estimator is stable in the whole operation range including the regenerating mode without any modifications. The stability enhancement method for AFO and MRASCC 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.

Stability analysis of MRASSCC speed estimator in motoring and regenerating mode

Korzonek M., Orłowska-Kowalska T.

Power Electronics and Drives

2016

Vol. 1 (36), No. 2

113--131

This paper deals with the stability analysis of MRAS current speed estimator in a motoring and regenerating mode. The unstable operating points of the estimator, mainly in a regenerating mode are widely discussed. The expanded version of the estimator MRASCC is proposed to provide its stability in the whole operating range. The new correction coefficients for two analyzed stabilization methods are proposed. Finally, simulation results confirming the theoretical analysis are presented.