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In this paper, two different model reference adaptive systems (MRASs) based on the rotor-flux and the instantaneous reactive power errors for the speed estimation of an induction motor (IM) drive are compared from the stability point of view. The rotor-flux error based MRAS (RF-MRAS) involves the computation of rotor flux for the estimation of rotor speed. This, however, suffers from the integrator...
Since the rotor resistance is associated with a slip calculation, the precise identification of rotor resistance has a crucial impact on the dynamic behavior of the whole Indirect Field Orientation Control. This paper presents a new technique based on Model Reference Adaptive System scheme for on-line estimation of an induction motor rotor resistance. The proposed rotor parameter identification is...
The performance of a flux-eliminated MRAS at very low and zero speed is investigated experimentally in this paper. The estimator is formed with the model reference adaptive system (MRAS). Instantaneous reactive power is considered in the reference model of the MRAS, whereas, the adjustable model is based on steady state reactive power under flux oriented condition. The use of flux oriented steady...
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