All-electric A.C. tractor

Details All-electric A.C. tractor All-electric A.C. tractor

1978-09-11

1980-04-08

Peters, Jr., Joseph F.

Motor vehicles

Steering by driving

Combined with manual steering

180 65C, 318 52, 318 68, 318721, 318807, 414526, B60L 1108, B62D 1104

Patent

active

041967852

ABSTRACT:
An electronic differential speed control circuit for driving the inboard and outboard A.C. wheel motors at different relative speeds depending upon the steering angle during a turn. An electrical circuit for sensing the torque of the tractor's wheel motors to maintain a constant implement draft. A hollow tubular axle pivots around the tractor's longitudinal material-transferring tunnel to conserve space and permit mounting of the wheel motors within the axle. The tunnel has two material-transferring compartments or passageways, and has vertically movable extensions on either end to facilitate coupling to accessories. An electrical power outlet is provided for energizing non-motor driven accessories.

REFERENCES:
patent: 3481417 (1969-12-01), Jarret et al.
patent: 3577050 (1971-05-01), Ringland et al.
patent: 3584276 (1971-06-01), Ringland et al.
patent: 3690395 (1972-09-01), Spiller et al.
patent: 3713504 (1973-01-01), Shimer et al.
patent: 3756335 (1973-09-01), Eisele et al.
patent: 3860081 (1975-01-01), Moll et al.
patent: 3870935 (1975-03-01), Abels et al.
"An A-C Individual Wheel Drive System for Land Vehicles", by Walter Slabiak, U.S. Army Tank-Automotive Center, pp. 664-671, Document 660,134 (undated).
"Precise Control of a 30 Squirrel-Cage Induction Motor Using a Practical Cycloconverter", Slabiak and Lawson, IEEE Trans. on Industry & Genl. Aplications, vol. 2, No. 4, Jul.-Aug. 1923.
"Optimal Control System Performance for an A-C Electric Drive", Lawson et al, Power Equipment Div. Lear Siegler, Inc. Document 660,135 (undated).
"Le Tourneau Letro-Stacker", Product Circular, dated Sep. 1969.

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