Modélisation et optimisation d’un alterno-démarreur synchrone à griffes pour l’application « mild-hybrid »

Abstract : The research work carried out in this thesis concerns the modeling and optimization of claw-pole synchronous alternator used in mild-hybrid vehicles. The use of this machine is extended to assistit traction engine and energy recovery in the braking phases. The special structure of the rotor makes it necessary to use 3D finite element models to analyse efficiently the three-dimensional effects, which requires an intensive use of computing resources (RAM, CPU time). The latter must be reduced in order to consider an optimization process on such magnetic devices. In this context, the use of a Gmsh and GetDP, open modeling platform, led to the development of precise models, fast enough to be integrated into optimization algorithms. The originality of this modeling approach is based on the hybridization of a numerical approach (3D finite elements) and a semi-analytical approach (permeance network) so that the use of 3D finite elements is reduced to areas where The magnetic field is three-dimensional. Finally, the choice of an optimization algorithm adapted to numerical models (black box with high evaluation cost) allows to develop a pre-design and a design tools for claw-pole synchronous machines in order to obtain an optimized geometry achieving an industrial specification
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Geoffrey Devornique. Modélisation et optimisation d’un alterno-démarreur synchrone à griffes pour l’application « mild-hybrid ». Energie électrique. Université de Lorraine, 2017. Français. ⟨NNT : 2017LORR0173⟩. ⟨tel-01935530⟩

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