Electricity: motive power systems – Plural – diverse or diversely controlled electric motors – Slipping and/or racing control for electric motors
Patent
1973-10-18
1977-07-12
Schaefer, Robert K.
Electricity: motive power systems
Plural, diverse or diversely controlled electric motors
Slipping and/or racing control for electric motors
318434, 105 61, B61C 1512
Patent
active
040356981
ABSTRACT:
For counteracting slipping and skidding in a motor-driven rail vehicle, the acceleration of the driving wheel is sensed and is used to control the torque of the driving motor. The arrangement includes a device which is responsive to an absolute value of the acceleration which exceeds a predetermined first value to reduce the torque, and to a decrease in the absolute value of the acceleration to a second value to increase the torque. The torque reducing arrangement reduces the torque at a predetermined rate until a low first torque value has been reached, then reduces the torque at a lower rate until the predetermined second low acceleration value is reached, and thereafter increases the torque, the reverse of this procedure is followed when increasing the torque.
REFERENCES:
patent: 3257597 (1966-06-01), Weiser
patent: 3378743 (1968-04-01), Weiser
patent: 3482887 (1969-12-01), Sheppard
patent: 3541406 (1970-11-01), Etienne
patent: 3560759 (1971-02-01), Buehler et al.
patent: 3657601 (1972-04-01), Darrow
ASEA Aktiebolog
Feldhaus John J.
Marsh, Jr. James H.
Schaefer Robert K.
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