Contribution à la modélisation et à l'optimisation des machines à flux transverse : application au cas de la machine à flux transverse "claw-pole" à stator hybride
|Abstract:||The high power and torque capabilities of Transverse Flux Machines (TFM) are well known. The particular arrangement of the TFM’s electric and magnetic circuits, which mainly explains its exceptional features, also greatly complicates the TFM design process. Building an accurate analytical magnetic model for a TFM is a hard task: factors as the leakage flux, magnetic saturation or 3-D flux paths greatly affect the model accuracy. As the use of an inaccurate model can lead to erroneous results, TFM designers extensively use numerical models, as 3-D finite element analysis (FEA). Despite their accuracy, such numerical tools are still time and resource consuming but also tricky to use for optimization purpose. This thesis proposes an alternative approach for the design of TFM: a hybrid model, based on analytical calculations, corrected with finite element results inside the optimization process. Such an approach is used in order to optimize the performances of a claw-pole TFM with hybrid stator (CTFMHS). This work first presents how FEA-derived correction factors can be inserted in the analytical model to improve the model accuracy, in the course of the design process. The principles and the effectiveness of the proposed approach are shown through an example of CTFMHS no-load flux maximization. The approach is then derived in order to maximize the torque density of the CTFMHS. Considering the specifications of an in-wheel motor application, it is shown how the developed approach can determine, in a few hours only, the optimal machine geometry maximizing its torque density.|
|Document Type:||Thèse de doctorat|
|Open Access Date:||18 April 2018|
|Collection:||Thèses et mémoires|
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