Thèse soutenue

Commande sans capteurs mécaniques de la machine synchrone à trois étages à faible vitesse pour une application aéronautique
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Auteur / Autrice : Amira Maalouf Haddad
Direction : Sandrine Le BalloisÉric Monmasson
Type : Thèse de doctorat
Discipline(s) : Électronique Électrotechnique Automatique
Date : Soutenance le 03/03/2011
Etablissement(s) : Cachan, Ecole normale supérieure
Ecole(s) doctorale(s) : École doctorale Sciences pratiques (1998-2015 ; Cachan, Val-de-Marne)
Jury : Examinateurs / Examinatrices : Francis Labrique, Karel Jazernick, Christophe Bruzy
Rapporteurs / Rapporteuses : Maurice Fadel, Éric Semail

Résumé

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In More Electric Aircraft, different power system activities are attributed to electrical means such as the start-up of the main engine. In this context, the study of the sensorless control of the Brushless Synchronous Starter Generator (BSSG) that is used to electrically start the main engine is revealed to be a very interesting issue. For long time, the elimination of the mechanical sensor was highly recommended for reliability, cost, weight, integration issues.Hence, this work aims to transpose the results obtained in the research area to an avionic testbench. It presents an adaptive sensorless technique to use when electrically starting the main engine of the aircraft. This is achieved by elaborating three different methods selected depending on the speed of the machine and based on the :- injection of a high frequency signal- use of the back-emf of the Permanent Magnet Generator (PMG)- use of the extended Kalman Filter EKFIn this work, it is shown that the …first method gives good position estimation results from standstill up to 8% of the rated speed. Then, the back-emfs of the PMG are used to detect the position of the BSSG when the speed exceeds the 8% of the rated speed. Good results are observed with this method at medium and high speed.For redundancy reasons, the EKF was also used in this work. Thus, the estimated position can be delivered via two different estimation algorithms in medium and high speed region.The implementation of the algorithm was achieved on an FPGA board since the latter can ensure a very tiny execution time. The fastness of the treatment ensures quasi-instantaneous position estimation and does not practically introduce any phase lag in the position estimation.