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| Articles
by
A. Metatla |
Total Records (
3 ) for
A. Metatla |
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A. Metatla
,
T. Bahi
,
I. Hadjadj
and
M.S. Mouchaweh
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This study presents the application of estimate techniques, in particular observer technique, in the diagnosis and the order without induction sensor engine. The engine with induction has the advantage of being robust, inexpensive and of simple construction. For these reasons it remains very appreciated and reliable for applications to high dynamic performances in the industrial world. The development of estimate techniques and microcontrôleurs appearance, DSP at low cost, for the data processing make engine with induction an exceptional actiner thanks to an excellent mass couple, a maximum reliability and a significant transitory surcouple. To preserve the correct operation of these systems, it is essential to supervise their operating condition in a continuous way. As a metter of fact the monitoring requires in its turn a set of apparatuses or measuring instruments, that are not alaways available, to provide data relating to the various operating modes from the system. Although the objective of this study is to reduce the number of measuring apparatus, for technological or economic reasons and consequently, sensors and wiring. This material is to be replaced by software built on the basis of estimator of states reducing in this way the cost of the installations and thus increases their reliability and automatically the output of production. |
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A. Metatla
,
,
A. Medoued
,
T. Bahi
and
I. Hadjaj
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This study presents the application of the techniques of the observer in sensorless control of inductor motor. Sensorless control requires the estimate in real time of the non measurable quantities. The observer of Luenberger and Kalman makes it possible to solve this problem thanks to the use of a model of state of the induction motor. In this research we use the model having for variables of state the current and stator flux. The technique of sensorless control using the observer of a complete nature is presented in simulation. Linear and non linear variables of Luenberger observer are also discussed in theoretical overview.
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A. Medoued
,
A. Metatla
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T. Bahi
and
A. Boukadoum
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In this study, we approach the diagnosis of the stator and rotor defects in the asynchronous squirrel-cage machines. After having evoked the principal defects being able to occur, we propose a model of the machine based on the method of circuits magnetically coupled. This model makes it possible to study the influence of the defect of short circuit and break of bar, on the general behavior of the asynchronous motor. In complement of the undertaken study, we will highlight the importance of the analysis of the signals for the diagnosis of the stator and rotor defects. |
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