Railways – Magnetically suspended car – Propulsion means employed to suspend car
Patent
1986-08-01
1988-12-27
Reeves, Robert B.
Railways
Magnetically suspended car
Propulsion means employed to suspend car
104286, 104293, 104294, 310 12, 310 13, B61B 1308
Patent
active
047932635
ABSTRACT:
Disclosed is a single, integrated linear synchronous unipolar motor having high-energy permanent magnets operable along a substantially linear demagnetization curve and a polyphase coil. Collectively, the permanent magnets and polyphase coil provide for propulsion, suspension, braking and lateral control of a vehicle along a passive reaction rail. The permanent magnets provide the primary force for suspending the vehicle from the guideway, with a DC field control coil controlling the suspension gap between the vehicle and the reaction rail. The polyphase coil propels the vehicle along the track at a speed dependent upon the voltage and frequency of the supplied signal. The motor exhibits a high power factor and efficiency factor, resulting in a motor that can be operated from a power source having a lower KVA rating than that required for previous linear motor arrangements and that can be used in concert with a low-cost, passive guideway.
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Basic John J.
Gilliland Richard G.
Hajec Donald T.
Reeves Robert B.
The Boeing Company
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