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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(More)
In this paper we analyze the asymptotic stability of a vector control system for an induction motor with short-circuited rotor that contains in its loop a Luemberger estimator. The studied control system is based on the direct rotor flux orientation method (DFOC) and the stability study is based upon the linearization theorem around the equilibrium points(More)
This paper presents an analytic method of controllers tuning for the speed vector control of induction motor drive system. The control system is on with orientation after the rotor flux. The controllers tuning is made analytical, by using the poles-zeros methods and the symmetry and modulus criterion, the Kessler variant.
In this paper we analyze the asymptotic stability of a vector control system for a squirrel-cage induction motor that contains in its loop an extended Luemberger observer. The studied control system is based on the direct rotor flux orientation method (DFOC) and the stability study is based upon the linearization theorem around the equilibrium points of the(More)
—The paper presents a synthesis of an extended Gopinath observer (EGO) and analyzes the asymptotic stability of a squirrel-cage induction motor vector control system with an EGO in its loop. The considered control system is based on the direct rotor flux orientation method (DFOC) and the study of stability is based upon the linearization theorem applied(More)
This paper presents a new rotor flux and rotor speed observer of induction motor. The new observer is based on an adaptive mechanism. The design of the new observer is done using the notion of Lyapunov stability. The observer is designed to be used within a speed sensorless direct rotor field oriented control of induction motors.
The aim of the article is to study the stability of equilibrium points of a sensorless vector control systems with contain in the loop a MRAS observer (Model Reference Adaptive System). In the article are presented and the formulas for controllers tuning, from the composition of the speed vector control system.
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