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This paper describes a robust and efficient speed control of a three phase induction machine (IM) subjected to load disturbances. First, a Multiple-Input Multiple-Output (MIMO) PI-Backstepping controller is proposed for a robust and highly accurate tracking of the mechanical speed and rotor flux. Asymptotic stability of the control scheme is proven by Lyapunov Stability Theory. Second, an active online...
The machine's air-gap cannot be perfectly smooth. Since a static or a dynamic eccentricity occurs, a mixed eccentricity behavior is observed and manifests by amplitude modulation of the stator current. Many other failures related to the motor condition or its driven load produce this same effect. Hence, by loading an induction machine, eccentricities incidence may be masked. Furthermore, because of...
Elderly loads cannot impose to the driving rotation process a strict unvarying torque. This truth can occur even with new loads because of inherent manufacturing imperfections. In the majority of circumstances, the load torque varies according to the machine rotor position and these variations, which are not related to the motor health condition, involve an amplitude modulation of the machine stator...
Due to the natural structure of the asynchronous motor, the estimation of the rotor or stator flux is essential for the synthesis of the control law for high-performance drive applications. Based on linear matrix inequality (LMI) framework, we propose, in this paper, an approach to provide a robust rotor flux observer of the three-phase induction motor. Furthermore, based upon the notion of quadratic...
The induction motor is the principal source of the workhorse [1] in the industry. However, due to its high non linearity, a high-performance control of induction motor remains a challenge for the automation. In this paper, we present a robust solution for the observer and control of the induction machine taking into account the iron losses. The proposed technique is based on Lyapunov theory and application...
Mechanical unbalance fault is one of the most common reasons of excessive machine vibration. The control of such a type of defect makes it possible to avoid the damage and to guarantee machines functioning with the maximum effectiveness. This fault leads essentially to load torque oscillation around its average value at rotational frequency. Theoretical development based on magneto-motive forces approach...
The Induction Machine employing vector control is an unbeatable solution in high performance economical industrial servo drive applications. We present in this paper a high performance and robust controller applied to the induction motor. The proposed solution is based on a quasi Parameter Varying Approach framework to overcome the high non-linearity of dynamic model in rotating d,q frame. The LPV...
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