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Sensitivity Analysis of the Design Parameters in Electrodynamic Bearings

  • G. GentaEmail author
  • X. De Lépine
  • F. Impinna
  • J. Girardello
  • N. Amati
  • A. Tonoli
Conference paper
Part of the IUTAM Bookseries book series (IUTAMBOOK, volume 1011)

Abstract

Electrodynamic bearings exploit the eddy current effects that take place in a conductor rotating in a constant magnetic field to achieve passive levitation without the need of additional devices, as sensors, power electronics, etc. Nevertheless, the instability issues require a dynamic analysis that would guarantee the rotor stability. In the literature, electrodynamic bearings modeling is mainly based on quasi-static analysis, i.e., the study of the forces induced in a disk that rotates with a fixed eccentricity relative to the constant magnetic field. Although this approach is useful for a first-approximation analysis, it is intrinsically related to steady state conditions, and therefore limited. Besides, the quasi-static analysis is generally based on finite element simulations, in which geometries and material properties are tested through a trial-and-error method. In the following, a model of the bearing including a few parameters, but still able to describe both the quasi-static and the dynamic performance is presented. A sensitivity analysis based on the variation of the main design parameters of the electrodynamic bearing is performed.

Keywords

Electrodynamic bearings Quasi static analysis Finite element modeling Sensitivity analysis 

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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • G. Genta
    • 1
    Email author
  • X. De Lépine
    • 2
  • F. Impinna
    • 2
  • J. Girardello
    • 2
  • N. Amati
    • 2
  • A. Tonoli
    • 2
  1. 1.Department of Mechanics and Mechatronics LaboratoryPolitecnico di TorinoTorinoItaly
  2. 2.Mechatronics LaboratoryPolitecnico di TorinoTorinoItaly

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