Boots – shoes – and leggings
Patent
1989-04-13
1990-05-08
Black, Thomas G.
Boots, shoes, and leggings
36442605, 318 52, 180197, 303100, B61C 1508
Patent
active
049243950
ABSTRACT:
Synchronous wheel slip control is desirable in a locomotive having wheels driven by at least one traction motor which receives power from an engine driven generator. Wheel slip control in known systems involves increased cost and complexity resulting from sensors required to determine an actual locomotive speed. In the subject invention a microprocessor under software control is used to detect and control synchronous wheel slip. Generator current and voltage are measured and used in an empirical relationship to calculate an actual locomotive speed. A first-order-lag of the actual locomotive speed is calculated and compared to the calculated locomotive speed. If the compared values differ by more than a preselected reference a synchronous slip condition exists and the generator power is reduced by a preselected magnitude. The generator power is incrementally reduced until the synchronous slip condition is no longer detected. The cost of controlling wheel slip is reduced since no sensors are required for detecting actual locomotive speed.
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Article titled "Microprocessor Control of Wheel Slip" published in May, 1985, Joint ASME/IEEE Railroad Conference, New York, N.Y.
Earleson Walter E.
Evans Raymond G.
Richardson, Jr. Joseph W.
Black Thomas G.
Caterpillar Inc.
Muir Robert E.
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