Disturbance and nonlinear Luenberger observers for estimating mechanical variables in permanent magnet synchronous motors under mechanical parameters uncertainties
Solsona, J.A.
Valla, M.I.
Departamento Electrotecnia, Univ. Nacional del Comahue-CONICET, Buenos Aires, Argentina;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Aug. 2003
Volume: 50,
Issue: 4
On page(s): 717- 725
ISSN: 0278-0046
INSPEC Accession Number: 7708552
Digital Object Identifier: 10.1109/TIE.2003.814866
Current Version Published: 2003-07-28
Abstract
This paper deals with rotor position and speed estimation of permanent-magnet synchronous motors. Two reduced-order observers, a disturbance observer and a nonlinear one, are considered. It is shown that under exact model assumption the nonlinear observer converges in an exponential way, while a residual estimation error appears when the disturbance observer is used. Therefore, uncertainties in the mechanical submodel are taken into account. Estimation error arises due to the model mismatch; bounds for this error are calculated in both observers. Finally, a comparison of the performance of each observer is presented.
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