Patents by Inventor Bryan M. Gromacki

Bryan M. Gromacki has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Braking grid isolation for locomotive traction motor control system
    Patent number: 5517093
    Abstract: A locomotive traction motor control system includes a traction motor to propel a locomotive when it motors, and to slow the locomotive when it engages dynamic braking. A resistive element dissipates electrical energy generated during dynamic braking. A control element, operatively coupled to the resistive element, selectively isolates the resistive element from the tractor motor when the locomotive motors. The resistive grid isolation may be accomplished with a pair of isolation switches coupled in series between the traction motor and the resistive element and a controller which opens the isolation switches when the locomotive motors and closes the isolation switches when the locomotive engages dynamic braking.
    Type: Grant
    Filed: December 16, 1993
    Date of Patent: May 14, 1996
    Assignee: General Electric Company
    Inventors: Timothy Augustyniak, Bryan M. Gromacki