Loss evaluation and simulation of superconducting magnetic bearings

Z. Kohari, V. Tihanyi, I. Vajda

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Static and dynamic behaviors of axial flux SC magnetic bearings are very important for motor-generator design. Stability and losses were investigated both theoretically and experimentally, and spin down curves were calculated and measured. We derived the dynamic mechanical equations for axial SC bearings, and gave a mathematical frame which can include different spin-down models and loss components in which only macroscopic factors were taken into account. The elasticity of the bearings (lateral displacement) was taken into account on the basis of static force measurements. We suggested a mathematical description for the deceleration also, where each loss component was described by one appropriate coefficient. We also made a rather simple but effective superconductor model, which can be used in 2D or 3D finite difference or finite element methods. In this the superconductor was characterized by a maximum flux density gradient which has a close relation to the pinning forces, and is equivalent with a Jc value in ID.

Original languageEnglish
Pages (from-to)2328-2331
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume15
Issue number2 PART II
DOIs
Publication statusPublished - Jun 2005

Fingerprint

magnetic bearings
Magnetic bearings
Bearings (structural)
Superconducting materials
evaluation
Fluxes
simulation
Force measurement
Deceleration
deceleration
Elasticity
finite element method
generators
elastic properties
flux density
Finite element method
gradients
curves
coefficients

Keywords

  • Axial flux superconducting bearings
  • Energy storage flywheel
  • Losses
  • Rotor dynamics
  • Superconductor model

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Physics and Astronomy (miscellaneous)

Cite this

Loss evaluation and simulation of superconducting magnetic bearings. / Kohari, Z.; Tihanyi, V.; Vajda, I.

In: IEEE Transactions on Applied Superconductivity, Vol. 15, No. 2 PART II, 06.2005, p. 2328-2331.

Research output: Contribution to journalArticle

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