Walid BALGUERRAS : "Magneto-vibro-acoustic Modeling and Optimization of a Double-Beam Variable Reluctance Machine"

PhD works of Walid BALGUERRAS : "Magneto-vibro-acoustic Modeling and Optimization of a Double-Beam Variable Reluctance Machine"

Abstract : In this brief we address the subject of acoustic noise of switched reluctance machine, which represents one of the major drawbacks of this machine topology. We have focused in the work of this thesis towards the study and optimization of acoustic noise of electromagnetic origin by relying on multi-physical electromagnetic, vibratory and acoustic modeling. In order to integrate them into an optimization approach, the multi-physical models developed are based on analytical methods. Two electromagnetic models are developed: the first model does not take into account the relative permeability of iron, supposedly infinite, while the second takes into account the exact relative permeability of iron. These models are based on the formal resolution of Maxwell's equations in each area of the machine. The vibratory model developed is based on the resolution of the dynamic equation using the theory of circular beams (ring equivalent to the stator). This model is used to determine the sound power radiated by the machine using an analytical acoustic model. These different models are validated by a numerical calculation by finite elements. The multi-physical model developed is then used to perform multipurpose optimization with minimizing noise, maximizing the average torque and minimizing torque ripples by
considering three operating points. The objective is to obtain the geometry of the machine which presents the
best compromise between the operating points considered in terms of noise without degrading the performance
of the machine too much. Several machines are selected and compared in terms of electromagnetic and acoustic
performance.

Jury Composition :

M. Mickaël HILAIRET PR1 Université Bourgogne Franche-Comté - PhD Director
M. Vincent LANFRANCHI Professeur des universités Université de Technologie de Compiègne - Reporter
M. Thierry LUBIN Maître de conférences Université de Lorraine - Reporter
M. Stéphane BRISSET Professeur des universités Ecole Centrale de Lille - Reviewer
M. Frédéric DUBAS Maître de conférences Université Bourgogne Franche-Comté
M. Xavier MININGER Professeur des universités Université de Paris-Saclay

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