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T. Wolbank, M. Metwally:
"Separation of saliency information for speed sensorless detection of induction machines flux and rotor position";
COMPEL - The International Journal for Computation and Mathematics in Electrical and Electronic Engineering, 29 (2010), 5; S. 1380 - 1392.

Purpose - The purpose of this paper is to describe an effective method to eliminate or substantially
reduce the modulation harmonics due to saturation and inter-modulation for sensorless speed control
induction motor drives at low and zero speed with high loads using artificial neural networks (ANN).
Design/methodology/approach - In this paper, the separation of the saturation signal, the slotting
signal, and the inter-modulation signal components in squirrel cage induction machines operating at
low and zero frequency using ANN has been experimentally implemented and measurement results
are given.
Findings - The measurement results show the advantages of the application of the proposed
technique at low and zero speed sensorless control even at high load levels.
Originality/value - The paper describes an effective method of eliminating or reducing modulation
harmonics in induction motor drives.
Keywords Control systems, Flux, Fourier transforms, Neural nets, Electric machines
Paper type Research paper

http://dx.doi.org/10.1108/03321641011061560

http://publik.tuwien.ac.at/files/PubDat_189709.pdf