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T. Wolbank, M. Vogelsberger, R.H. Stumberger, S. Mohagheghi, T Habetler, R. Harley:
"Autonomous self commissioning method for speed sensorless controlled induction machines";
IEEE Transactions on Industry Applications, 3 (2010), 46; 946 - 954.

Speed sensorless control of ac machines at zero speed so
far is only possible using signal injection methods. Especially
when applied to induction machines the spatial saturation leads
to a dependence of the resulting control signals on the flux/load
level. Usually this dependence has to be identified on a special
test stand during a commissioning procedure for each type of
induction machine. In this paper an autonomous commissioning
method based on a neural network approach is proposed that
does neither depend on a speed sensor present as a reference nor
on a load dynamometer coupled to the machine and guaranteeing
constant speed. The training data for the neural network is
obtained using only acceleration and deceleration measurements
of the uncoupled machine. The reliability of the proposed
autonomous commissioning method is proven by measurement
results. When comparing the resulting sensorless control
performance, the proposed commissioning method reaches the
same level of performance as a manual identification using load
dynamometer as well as speed sensor.

http://publik.tuwien.ac.at/files/PubDat_186946.pdf