Summary:
This paper presents a rotor-speed estimator for induction motor drives which uses only stator voltage and current measurements. First of all, the identifiability of the rotor speed is analysed in relation to the operating point, giving a good insight into when and why rotor speed can be estimated. Secondly, a computation method is proposed for the rotor speed. Its sensitivity to errors in both model parameters and measurements is discussed in detail. In order to produce effective noise attenuation, a state-variable filter and a recursive total least-squares (TLS) algorithm are used. The estimator is validated by simulation and by field tests.
Keywords: Induction motor control; identification; sensitivity analysis; filtering; total least squares
JCR Impact Factor and WoS quartile: 4,900 - Q2 (2022)
DOI reference:
https://doi.org/10.1016/S0967-0661(97)00022-1
Published on paper: March 1998.
Published on-line: August 1998.
Citation:
J. Zamora, A. García-Cerrada, A. Zazo, Rotor-speed estimator for induction motors using voltage and current measurements. Control Engineering Practice. Vol. 6, nº. 3, pp. 369 - 383, March 1998. [Online: August 1998]
