Eddy current computations applied to magnetic suspensions and magnetic bearings
Conference
·
OSTI ID:390768
This paper presents the results of theoretical analyses, which suggest general forms of mathematical models for eddy currents, together with computations carried out using a finite-element computer code ELEKTRA. Results are compared to experimental measurements of the effects of eddy currents in a large-gap magnetic suspension system, the Large Angle Magnetic Suspension Test Fixture (LAMSTF). Computations are also shown relating to the Annular Suspension and Pointing System, a prototype for a space payload pointing and vibration isolation system, where the geometry is more directly relevant to magnetic bearing applications. In each case, computations can provide estimates of coil inductance, power dissipation and the phase lag in the magnetic field, all as functions of excitation frequency. Finally, some comments and opinions concerning the significance of eddy currents in these applications, and regarding the ease and accuracy of computation, are given.
- OSTI ID:
- 390768
- Report Number(s):
- CONF-950852--
- Country of Publication:
- United States
- Language:
- English
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