Linear drive motor multiple carrier control system

Details Linear drive motor multiple carrier control system Linear drive motor multiple carrier control system

B - Operations, Transporting

60

L

341/97

B60L 15/00 (2006.01)

Patent

CA 1279713

ABSTRACT Disclosed is a multiple carrier transportation system. The system employs a plurality of linear induction motors positioned along a track. A plurality of carrier units are used for moving work pieces along the track. Each carrier is mounted with a reaction plate or secondary. The reaction plate passes over the linear induction motors and reacts with the electromagnetic field generated therein. The electromagnetic energy induced from the linear induction motors into the secondary produces a mechanical thrust which propels the carrier along the track. A control system utilizing a series of feedback loops and a computer is used to monitor and coordinate the movement of the carriers in the system. Attached to each carrier is a position indicator. The indicator relays position information to position sensors. The sensors relay position information to a control module or computer which determines the velocity and acceleration of the carrier. These values are then compared to a set of velocity and acceleration curves stored in memory. Deviations between the actual and desired speeds are corrected for by varying the power input to the linear induction motors. The control modules or computers are interconnected and receive information and instruction from a central data computer. The position, velocity, and acceleration of each carrier in the system is thus monitored and controlled.

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