Importance

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Abstract

A deceleration zone in a linear motor in-track transit system is provided. The transit system includes a guideway and at least one vehicle carrying a linear motor secondary moveable along the guideway between a freight loading station and a freight unloading station. Linear induction motor (LIM) primaries are disposed along the guideway at spaced intervals to provide thrust to the vehicles. Deceleration zones are designated at certain segments of the guideway wherein reduced speed of the vehicles is required. The deceleration zones include a plurality of spaced permanent magnet decelerators located along the guideway adjacent the vehicle entrance end of the deceleration zone. The decelerators cause eddy currents to flow in the linear motor secondaries carried by vehicles passing thereover due to the magnetic interaction between the decelerators and the linear motor secondaries. The eddy currents result in a retarding thrust being supplied to the vehicles. A synchronous speed linear motor primary is also located in the deceleration zones adjacent the vehicle exit end thereof and functions to supply thrust of an appropriate magnitude and direction to the vehicles to cause vehicles of different mass to leave the deceleration zone at substantially the same speed.

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First Claim