Electrodynamic guidance using alternating current...

B - Operations – Transporting – 60 – L

Patent

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Details

B60L 13/06 (2006.01) B60L 13/04 (2006.01) B60L 13/08 (2006.01) B60L 13/10 (2006.01) B61B 13/08 (2006.01)

Patent

CA 2191236

An electrodynamic suspension system levitates a platform (1) or transportation vehicle (10) by an array of onboard superconduct- ing electromagnetic coils (20, 21) forming a primary member over- lying a secondary member (46) on the guideway (11) in a trans- verse flux orientation with respect to a plane of levitation of the moveable member (10) above the secondary member (46) on the guideway (11). The superconducting coils (20, 21) are energized by alternating current to produce an alternating field of magnetic flux. The frequency of the alternating current is selectable down to direct current. The frequency is selected to cause the vehicle (10) to be levitated statically above the guideway (11). Once levitated, the frequency is reduced as the speed of the vehicle (10) increases along the guideway usually not in excess of 60 miles per hour. Pas- sive electrically conductive plates (47) form the secondary member to respond to the alternating field of magnetic flux and both guide and levitate the vehicle (10) by inherently stable repulsive induction action.

Un système de suspension électrodynamique assure la sustentation d'une plate-forme (1) ou d'un véhicule de transport (10) à l'aide d'une rangée de bobines électromagnétiques (20, 21) supraconductrices, qui forment un élément primaire recouvrant un élément secondaire (46) sur la voie de guidage (11) dans une orientation de flux transversale par rapport au plan de sustentation de l'élément mobile (10) au-dessus de l'élément secondaire (46) sur la voie de guidage (11). Les bobines supraconductrices (20, 21) sont alimentées en courant alternatif pour produire un champ alternatif de flux magnétique. La fréquence est sélectionnée de manière à ce que le véhicule soit sustenté statiquement au-dessus de la voie de guidage (11). Une fois la sustentation assurée, la fréquence est réduite à mesure que la vitesse du véhicule (10) augmente le long de la voie de guidage, de manière générale, sans dépasser 60 miles à l'heure. Des plaques (47) électroconductrices passives constituent l'élément secondaire de manière à réagir au champ alternatif du flux magnétique et à guider ainsi qu'à assurer la sustentation du véhicule (10) par induction par répulsion intrinsèquement stable.

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