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Railway car retarder system
| Details |
Inventors: Giras, Theo C.; Profeta, Joseph A.; Romano, Dario; Elm, Joseph P.;
Assignee: Union Switch & Signal Inc. (Pittsburgh, PA)
Primary Examiner: Morano; S. Joseph
Assistant Examiner:
Attorney, Agent or Firm: Buchanan Ingersoll, P.C.
A railway car retarder mechanism that employs linear electromagnetic induction to precisely accelerate or decelerate a railcar. The retarder mechanism includes a plurality of linear induction stators having a spaced plurality of primary inductors, a controllable power source electrically connected with selected ones of the primary inductors, a controller for controlling the electric current transmitted to the respective primary inductors by the controllable power source, and a sensor for sensing selected railcar parameters and transmitting those parameters to the controller, so that the speed-corrective forces applied by the retarder are proportional to these parameters. The controller regulates the magnetomotive force which is imparted upon a selected one of a plurality of railcar wheel sets, and is connected with each controllable power source. In some embodiments, the sensor include at least a portion of fiber-optic cable, which cable can be disposed proximate to a predetermined length of track rail. |
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DETAILED DESCRIPTION The invention provides for a railway car retarder mechanism that employs linear electromagnetic induction to precisely accelerate or decelerate a railcar.
The retarder mechanism includes a plurality of linear induction stators having a spaced plurality of primary inductors, a controllable power source electrically connected with selected ones of the primary inductors, a controller for controlling the electric current transmitted to the respective primary inductors by the controllable power source, and a sensor for sensing selected railcar parameters and transmitting those parameters to the controller, so that the speed-corrective forces applied by the retarder are proportional to these parameters.
The controller regulates the magnetomotive force which is imparted upon a selected one of a plurality of railcar wheel sets, and is connected with each controllable power source.
In some embodiments, the sensor include at least a portion of fiber-optic cable, which cable can be disposed proximate to a predetermined length of track rail.
Respective pairs of the primary inductors may have at least a portion of track rail disposed between them.
In one embodiment, pole faces of respective ones of plurality of primary inductors are oriented generally perpendicularly to the direction of, and in confronting relation with, a track rail.
In this embodiment, at least a portion of the track rail generally can be disposed between the respective pole faces.
In another embodiment, respective ones of the primary inductors are magnetically linked by at least a portion of a magnetically permeable substrate to respective other primary inductors.
The track rail is disposed generally above the plurality of primary inductors and the substrate, and is magnetically linked to at least a portion of the substrate.
In this embodiment, the track rail can have a plurality of magnetic track sections and a plurality of non-magnetic track sections, with respective ones of the plurality of non-magnetic track sections being interposed between respective ones of the plurality of magnetic track sections
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