The Study of Women and Music in Morocco

Panorama of scholarly work on women and music in Morocc

Performance comparison of axial-flux switched reluctance machines with non-oriented and grain-oriented electrical steel rotors

This paper studies the performance of an axial-flux switched reluctance machine (AFSRM) using GOES (grain-oriented electrical steel) in its rotor and comparing it to a NOES (non-oriented electrical steel) rotor. Indeed, the AFSRM structure lends itself well to the use of GOES, especially at the rotor. In order to evaluate the intrinsic capabilities of the AFSRM, self-inductance versus rotor position and static torque were numerically simulated at a given operating point and used as indicators for the NOES and GOES performance comparison. The static torque is also used to determine and compare the torque per volume ratios and grasp the impact of GOES use in a 3D rotating structure. The introduction of GOES in a rotating machine leads to an improvement of the electromagnetic torque mean and maximum values, allowing to evaluate the GOES impact on the machine performance

Investigating the use of grain-oriented electrical steel in axial-flux switched reluctance machines

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Comparaison des performances de machines à réluctance variable 8/6 à flux radial et axial

International audienceCet article propose une comparaison des performances de deux machines à réluctance variable à flux radial(MRVFR) et axial (MRVFA), présentant des surfaces actives équivalentes. Les valeurs d’inductances sont d’abord estimées par des réseaux de réluctances. Ensuite, des modèles numériques éléments finis sont mis en oeuvre pour corroborer ces résultats et déterminer le couple électromagnétique de chacune des deux structures.Les résultats de cette comparaison montrent une amélioration du couple électromagnétique de la MRVFA et une réduction de son volume. La MRVFA fait enfin l’objet d’une analyse de certains paramètres géométriques sur l’inductance et le couple statique

Performance comparison of axial-flux switched reluctance machines with non-oriented and grain-oriented electrical steel rotors

International audienceThis paper studies the performance of an axialflux switched reluctance machine (AFSRM) using GOES (grain-oriented electrical steel) in its rotor and comparing it to a NOES (non-oriented electrical steel) rotor. Indeed, the AFSRM structure lends itself well to the use of GOES, especially at the rotor. In order to evaluate the intrinsic capabilities of the AFSRM, self-inductance versus rotor position and static torque were numerically simulated at a given operating point and used as indicators for the NOES and GOES performance comparison. The static torque is also used to determine and compare the torque per volume ratios and grasp the impact of GOES use in a 3D rotating structure. The introduction of GOES in a rotating machine leads to an improvement of the electromagnetic torque mean and maximum values, allowing to evaluate the GOES impact on the machine performance

Comparison of 8/6 radial and axial flux switched reluctance machines

International audiencePurpose This paper aims to deal with a performance comparison of an 8/6 radial-flux switched reluctance machine (RFSRM) and an axial-flux switched reluctance machine (AFSRM), presenting equivalent active surfaces. Design/methodology/approach An axial machine was designed based on the equivalent active surfaces of a radial one. After estimating the machine inductances with a reluctance network, finite elements numerical models have been implemented for a more precise inductance determination and to estimate the electromagnetic torque for both machines. Finally, the AFSRM was thoroughly examined by analyzing the impact of some geometric parameters on its performance. Findings The comparison of the RFSRM and AFSRM at equivalent active surfaces showed that the obtained axial machine is more compact along with an improvement in the electromagnetic torque. Practical implications The equivalent AFSRM is more compact, therefore more interesting for transport and on-board applications. Originality/value The RFSRM and AFSRM performance comparison using the same active surfaces has not been done. Moreover, the AFSRM presented has a rare design with no rotor yoke and where the rotor teeth are encapsulated in a nonmagnetic structure, allowing a more compact design