TECHICAL Series MATHEMATICS • INFORMATICS • PHYSICS Series PHILOLOGY Series ECONOMIC SCIENCES Sereies EDUCATIONAL SCIENCES Series LAW AND SOCIAL SCIENCES Series
The Comparative Study of the Stability of the Vector Control Systems That Contain In the Loop Luenberger and Kalman Type Estimators
(Studiul comparativ al sistemelor de control vectorial cu ajutorul estimatoarelor de flux Luenberger şi Kalman)
Vol LVIII • No. 2bis/2006
Olimpiu Stoicuţa *, Horia Câmpian **, Teodor Pană **
* University of Petrosani
e-mail: olimpiu@upet.ro
** Technical University of Cluj-Napoca
e-mail teodor.pana@edr.utcluj.ro

 Keywords   sensorless vector control, induction motor, flux estimator, Luenberger, Kalman, discretisation.

 Abstract
The paper deals with speed vector-controlled induction motor drive systems, in which the rotor flux estimation is performed using Luenberger and Kalman estimators. A comparative study of the stability of the estimators and of the control systems which are included in the control loop is presented using both simplified and full discretisation method and modifying the sampling time used for each of the methods. The study is focused especially on the low and high speed regions. The conclusions are based on the comparing of the eigenvalues of the estimators in each studied case.

 Rezumat
Articolul se ocupă de studiul comparativ al sistemelor de control vectorial al motoarelor asincrone utilizând, ca estimatoare de flux rotoric, estimatoarele Luenberger sau Kalman. Studiul are în vedere domeniile vitezelor joase şi înalte. Se compară valorile proprii ale estimatoarelor pentru fiecare caz studiat.



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