Alimentation par onduleurs de tension des machines multi-étoiles

Abstract : In the context of power division in inverters - machines sets, this thesis treats the case of supplying a multi-star windings by several voltage source inverters. The proposed power division presents the advantage of modularity and authorize degraded functioning. In first, we present double star windings synchronous and asynchronous machines models in order to be supplied by two voltage source inverters. Analytical study of the complete system shows that high amplitude current ripples can occur because of the magnetic coupling between star windings. Analytical study, simulation and experimental results show that these over currents can be eliminated if star windings are not shifted and if master-slave control is applied on both inverters. Further more, it is preferable to have a weak magnetic coup ling between star windings and high switches frequency. These conclusions are generalized to multi-star windings A. C. machines.
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Nazih Moubayed. Alimentation par onduleurs de tension des machines multi-étoiles. Autre. Institut National Polytechnique de Lorraine, 1999. Français. ⟨NNT : 1999INPL069N⟩. ⟨tel-01749918⟩

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