Torque maximization and vibration control for AC locomotives

Details Torque maximization and vibration control for AC locomotives Torque maximization and vibration control for AC locomotives

1999-09-24

2000-12-19

Nappi, Robert E.

Electricity: motive power systems

Limitation of motor load, current, torque or force

318432, 318 52, 180197, H02P 700

Patent

active

061631213

ABSTRACT:
A method and traction control system for an AC locomotive which separately controls the allowable creep level of each individual axle and optimizes traction performance by minimizing torsional vibration per axle. The traction control system includes a torque maximizer and a torsional vibration detector. The torque maximizer evaluates the change in traction system performance levels and actual creep level of individual axles and determines the desired torque maximizer state for maximizing traction performance of each individual axle. The torque maximizer utilizes digital filtering to minimize control cycle time. The torsional vibration detector digitally processes estimated torque feedback of each traction motor in order to detect an unacceptable level of torsional vibration. The outputs of the torque maximizer and the torsional vibration detector are provided to a creep modulator which processes these inputs in order to control the operating creep level of each locomotive axle. As a result, traction performance is improved while minimizing torsional vibration and operating noise levels due to wheel/rail squeal.

REFERENCES:
patent: 4243927 (1981-01-01), D'Atre
patent: 4896090 (1990-01-01), Balch et al.
patent: 5841254 (1998-11-01), Balch et al.

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