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Effects of Mismatched Parameters in MRAS Sensorless Doubly Fed Induction Machine Drives

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4 Author(s)
Maria Stefania Carmeli ; Department of Electrical Engineering , Politecnico di Milano, Milano, Italy ; Francesco Castelli-Dezza ; Matteo Iacchetti ; Roberto Perini

This paper deals with a performance analysis of sensorless drives based on doubly fed induction machines. A simplified model of the whole system equipped with a generic model reference adaptive system (MRAS) observer is introduced, by taking also into account a mismatch in the parameters. Three MRAS known in literature are analyzed in detail and meaningful analytic relations between the mismatched parameters and the error in the estimated rotor position during a steady-state operation are deduced. Then, a stability analysis is performed and the stability regions of each drive are found. Finally, the theoretical results are experimentally validated.

Published in:

IEEE Transactions on Power Electronics  (Volume:25 ,  Issue: 11 )