Railways – Magnetically suspended car – Including means to sense or control car position or attitude...
Patent
1989-03-27
1990-05-15
Kashnikow, Andres
Railways
Magnetically suspended car
Including means to sense or control car position or attitude...
104293, B60L 1306, B60L 1300
Patent
active
049247786
ABSTRACT:
A plurality of stators of a linear induction motor are arranged at predetermined intervals, and guide rails are mounted on an upper portion of a track frame having a U-shaped section. A levitated object is magnetically levitated below the track frame so as to freely travel along the guide rails. Magnetic support units having electromagnets for obtaining a levitating force, optical gap sensors for detecting gap lengths between the support units and the guide rails, i.e., deviations in a levitating direction, and optical gap sensors for detecting deviations in a guiding direction perpendicular to a traveling direction of the levitated object are respectively arranged on the four corners of the upper surface of the levitated object. The length of each magnetic support unit is larger than the width of each guide rail. Each magnetic support unit is disposed such that the inner ends of the unit and the guide rail are aligned, and the outer end of the unit extends outward from that of the guide rail. A deviation between an output from each optical gap sensor and a corresponding reference value is fed back to a corresponding magnetic support unit, thereby controlling each electromagnet.
REFERENCES:
patent: 3871301 (1975-03-01), Kolm et al.
patent: 4800818 (1989-01-01), Kawaguchi et al.
patent: 4838172 (1989-06-01), Morishita
Azukizawa Teruo
Morishita Mimpei
Kabushiki Kaisha Toshiba
Kashnikow Andres
Mojica V. Lissi
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