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Stacked structures of passive magnetic bearings

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4 Author(s)
Yonnet, J.-P. ; Laboratoire d’Electrotechnique de Grenoble (URA 355 CNRS), Institut National Polytechnique de Grenoble, Ensieg, BP 46, 38402 Saint Martin d’Heres Cédex, France ; Lemarquand, G. ; Hemmerlin, Sophie ; OlivierÔÇÉRulliere, Elisabeth

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The stiffness of magnetic bearings composed of only two permanent magnet rings is limited. To increase this stiffness, stacked structures are used. Conventional stacking is obtained by placement of the magnetizations in opposition. This article presents another type of stacking with rotating magnetization direction (RMD), which improves the stiffness by about a factor of 2 in comparison with the conventional stack.

Published in:

Journal of Applied Physics  (Volume:70 ,  Issue: 10 )