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Theses

Machines à commutateur mécanique pour traction automobile : modélisation et optimisation

Abstract : The research work carried out in this thesis is part of a context of vehicle electrification in response to environmental concerns. This thesis focuses on the modeling and optimization of commutator machines used in powertrains of small electric vehicles. This kind of machines represents an alternate solution due to their competitiveness, robustness and reliability mainly due to the absence of power electronics. Nevertheless, they require compensation windings and commutation poles to improve their performances. Commutator power supply makes it necessary to take into account electrical dynamics in numerical magnetic modeling by finite elements. That is why, it is crucial to develop a model allowing a strong coupling in the sense of the variational formulation, of magnetic problem, external electrical circuit and finally current flow problem at the commutator interface. In this context, the use of a modeling opensource platform ONELAB has led to the development of an original model that performs projection of physical properties and sources on a fixed mesh. This method avoids remeshing during iterative processes such as geometric optimization or movement modeling. This method has led to the dynamic coupling of the magnetic problem and the external electrical circuit to the current flow formulation at the commutator interface as well as to prospects for multi-physical simulations at this interface. Finally, the choice of an optimization algorithm adapted to the numerical models (black box with a high evaluation cost) allowed the development of a tool for the design of commutator machines adapted to many topologies in order to fulfill industrial requirements.
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https://hal.univ-lorraine.fr/tel-03023000
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Submitted on : Wednesday, November 25, 2020 - 9:53:59 AM
Last modification on : Saturday, December 5, 2020 - 3:38:30 PM
Long-term archiving on: : Friday, February 26, 2021 - 6:26:40 PM

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Baptiste Ristagno. Machines à commutateur mécanique pour traction automobile : modélisation et optimisation. Energie électrique. Université de Lorraine, 2020. Français. ⟨NNT : 2020LORR0122⟩. ⟨tel-03023000⟩

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