Speed control system for an AC locomotive

Details Speed control system for an AC locomotive Speed control system for an AC locomotive

1995-06-26

1997-05-13

Stephan, Steven L.

Prime-mover dynamo plants

Train

290 9, 290 45, 318 68, B61C 300, B60L 310, H02P 546

Patent

active

056295677

ABSTRACT:
A speed control system for an AC electric locomotive of the type having a plurality of wheel-axle sets with each wheel-axle set being coupled to an independently controllable AC electric traction motor and each motor having a corresponding speed sensor, each speed sensor providing a pair of signals which are resolvable to determine the speed and direction of rotation of the associated motor rotor, wherein the control system is arranged for maintaining torque control during failure of one of the signals from an associated speed sensor. The system detects the presence of each of the pair of signals from each speed sensor and responds to detection of only one of the pair of signals from one of the speed sensors for setting motor speed in response to the detected one of the signals. Direction is then determined by using signals from another of the speed sensors.

REFERENCES:
patent: 4418301 (1983-11-01), Griffith
patent: 4634887 (1987-01-01), Balch et al.
patent: 4686434 (1987-08-01), Kojima et al.
patent: 5128536 (1992-07-01), Higashi
patent: 5349276 (1994-09-01), Mezzatesta, Jr. et al.
patent: 5357181 (1994-10-01), Mutoh et al.
patent: 5444340 (1995-08-01), Tamaki et al.

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