A permanent-magnet rotor for a high-temperature superconducting bearing

A permanent-magnet rotor for a high-temperature superconducting bearing

Design, fabrication, and performance of a 0.39-m diam., 6.8-kg flywheel rotor with only one bearing is discussed. To achieve low-loss energy storage, the rotor's segmented-ring permanent magnet (PM) is optimized for levitation and circumferential homogeneity. A PM figure of merit is proposed th...

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Veröffentlicht in:IEEE Transactions on Magnetics 1996-07, Vol.32 (4), p.2609-2612
Hauptverfasser: Mulcahy, T.M., Hull, J.R., Uherka, K.L., Abboud, R.G., Wise, J.H., Carnegie, D.W., Bakis, C.E., Gabrys, C.W.
Format: Artikel
Sprache:eng
Schlagworte:
Assembly
DESIGN
ENERGY STORAGE
FABRICATION
FLYWHEEL ENERGY STORAGE
FLYWHEELS
High temperature superconductors
HIGH-TC SUPERCONDUCTORS
MAGNETIC BEARINGS
Magnetic flux
Magnetic levitation
Magnetic materials
PERMANENT MAGNETS
ROTORS
Saturation magnetization
Stators
Superconducting magnetic energy storage
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Beschreibung
Zusammenfassung:Design, fabrication, and performance of a 0.39-m diam., 6.8-kg flywheel rotor with only one bearing is discussed. To achieve low-loss energy storage, the rotor's segmented-ring permanent magnet (PM) is optimized for levitation and circumferential homogeneity. A PM figure of merit is proposed that appears to correlate with loss data. Pre compression of the PM with fiber-composite banding is necessary for practical rotor speeds.
ISSN:0018-9464
1941-0069
DOI:10.1109/20.511408