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Theses

Conception et modélisation d'une machine synchrone à 7 phases à aimants permanents et flux axial : commande vectorielle en modes normal et dégradé

Abstract : For the variable speed drives, the electric machine being no more directly coupled to the three-phase network, the choice of phase number can be reconsidered. We are interested in this thesis in the design of variable speed drives comprising unsaturated permanent magnet synchronous machines with smooth poles but with more than three phases. The aim is to simultaneously examine the constraints related to the machine and to the voltage/control inverter, with the aim of making a high performance multiphase drive. The work developed in this study examines the specific possibility of multiphase machines to have magnetomotive and electromotive forces with space harmonics while presenting a very low magnitude of the torque ripples in normal operation or in fault mode operation with one or two phases not supplied. In the chapter II, for a fixed distribution of windings, we examine the effect of electromotive force modulations while modifying the kind and the space repartition of the permanent magnets on the rotors for the design of a 7 phase axial flux machine with double rotors. In the chapter III, a comparison between experimental results and results obtained by analytical and numerical (3D calculation) approaches is carried out. It makes possible to validate the analytical multi-harmonics approach and puts forward the contribution of numerical calculation. In the chapter IV, a control structure is built by causal inversion and a vector control is described and put into experimental set-up for normal and fault mode operations
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Fabrice Locment. Conception et modélisation d'une machine synchrone à 7 phases à aimants permanents et flux axial : commande vectorielle en modes normal et dégradé. Energie électrique. Université des Sciences et Technologie de Lille - Lille I, 2006. Français. ⟨tel-00421765⟩

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