Electricity: motive power systems – Braking – Dynamic braking
Patent
1978-08-25
1980-05-13
Rubinson, Gene Z.
Electricity: motive power systems
Braking
Dynamic braking
340648, 361 33, 361 86, 361 89, H02H 304, H02H 308, H02H 312
Patent
active
042030587
ABSTRACT:
A diesel electric locomotive has a dynamic braking system including a plurality of traction motors connected across dynamic braking grids. Air blowers for cooling the grids have motors which are connected across the grids. The failure of any motor is detected by monitoring the voltage across the motor with respect to a reference potential. The reference potential is developed in a bridge arrangement wherein the bridge imbalance is detected by a current sensor or by a reference potential generated in another motor circuit where another current sensor is used to detect a variance from the reference value. A circuit responsive to failure signals but voltage isolated from the traction motor circuits actuates an indicator as well as a relay for diminishing or terminating the dynamic braking function.
REFERENCES:
patent: 3660813 (1972-04-01), Rumpf
patent: 4048664 (1977-09-01), Kirilloff
General Motors Corporation
Hill Warren D.
Isen Forester W.
Rubinson Gene Z.
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