Torque maximization and vibration control for AC locomotives
US5841254A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 9, 1997 |
| Grant date | Nov 24, 1998 |
| Priority date | — |
| Expiry date | Jul 9, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB61C15/08
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A traction control system for an ac locomotive optimizes traction performance by separately controlling the allowable creep level of each individual axle and by minimizing torsional vibration per axle. The traction control system includes a torque maximizer and a torsional vibration detector. The torque maximizer measures traction system performance levels and determines the desired torque maximizer state for maximizing traction performance of each individual axle. 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.