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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...
This paper presents a comparative study between a wellknown instantaneous reactive power (Q) based MRAS (Q-MRAS) and a relatively new X-MRAS used for sensorless speed estimation of induction motor drive from the stability point of view. The instantaneous and steady state values of Q are considered to develop the reference and adaptive models respectively for the former whereas those of a fictitious...
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