Lift and drag forces are compared for various null and normal flux superconducting magnet configurations where each coil consists of a pair of infinitely long parallel wires separated by a fixed distance. The nullflux configuration has a minimum in the drag to lift ratio for a particular value of I 2/W (I = magnet current, W = vehicle weight) when the vehicle cruises freely at constant speed. This calculation takes into account losses due to non-uniform eddy-current density distribution in the solid track. Results indicate that the null-flux configuration is the most efficient design, followed by the normal-flux, single track configuration. All other schemes are less efficient for a thin track configuration. A general method is outlined for calculating the zero-torque case.
Comparison and optimization of lift and drag forces on vehicles levitated by eddy current repulsion for various null and normal flux magnets with one or two tracks
Durchfuehrung eines Vergleiches und einer Optimierung von Anheb- und Zugkraeften, die auf Fahrzeuge wirken, die durch Wirbelstromabstossung schweben, fuer verschiedene Magnete mit Null- und Normalfluss unter Einbeziehung von Einspur- und Zweispursystemen
IEEE Transactions on Magnetics ; 11 , 2 ; 604-607
1975
4 Seiten, 2 Bilder, 1 Tabelle, 12 Quellen
Article (Journal)
English
Calculation of motion induced eddy current forces in null flux coils
Tema Archive | 1995
|Superconducting magnets for levitated high speed vehicles
Tema Archive | 1975
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