Braking grid isolation for locomotive traction motor control sys

Details Braking grid isolation for locomotive traction motor control sys Braking grid isolation for locomotive traction motor control sys

1993-12-16

1996-05-14

Cabeca, John W.

Electricity: motive power systems

Plural, diverse or diversely controlled electric motors

Plural, diverse motor controls

318380, 318375, H02P 154, H02P 312

Patent

active

055170935

ABSTRACT:
A locomotive traction motor control system includes a traction motor to propel a locomotive when it motors, and to slow the locomotive when it engages dynamic braking. A resistive element dissipates electrical energy generated during dynamic braking. A control element, operatively coupled to the resistive element, selectively isolates the resistive element from the tractor motor when the locomotive motors. The resistive grid isolation may be accomplished with a pair of isolation switches coupled in series between the traction motor and the resistive element and a controller which opens the isolation switches when the locomotive motors and closes the isolation switches when the locomotive engages dynamic braking.

REFERENCES:
patent: 3967175 (1976-06-01), Turley
patent: 4423363 (1983-12-01), Clark et al.
patent: 4555652 (1985-11-01), Brulard
patent: 4697124 (1987-09-01), Schmitz
patent: 5140232 (1992-08-01), Naito

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