Electricity: motive power systems – Plural – diverse or diversely controlled electric motors – Slipping and/or racing control for electric motors
Patent
1989-04-13
1990-08-21
Ro, Bentsu
Electricity: motive power systems
Plural, diverse or diversely controlled electric motors
Slipping and/or racing control for electric motors
318 66, B61C 1508
Patent
active
049509640
ABSTRACT:
Differential wheel slip control is desirable in a locomotive having wheels driven by a plurality traction motors which receive 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 or individual traction motor speeds. In the subject invention a microprocessor under software control is used to detect and control differential wheel slip. A difference signal is generated in response to a difference between the highest and lowest individual traction motor currents. A first-order-lag of the actual locomotive speed is calculated and compared to the difference signal. If the compared signals differ by more than a preselected reference, a differential slip condition exists and the generator power is reduced by a preselected magnitude. Generator power is continually reduced until the slip condition no longer detected.
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Article titled "Microprocessor Control of Wheel Slip" published in May, 1985.
Caterpillar Inc.
Ro Bentsu
Vander Leest Kirk A.
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