MARK L NICOLUSSI
Engineers in Erie, PA

2008014, Jun 19, 2008

Dec 18, 2007

11/958782

Mark Nicolussi - Erie PA, US
Carl S. Iszkula - Girard PA, US

H02P 3/06

318375

A method for controlling a performance of a dynamic braking system to maintain a dynamic braking tractive effort current plateau and/or improve the dynamic braking tractive effort current plateau, the method including sensing the traction motor field current and regulating the traction motor field current to maintain at least one of a constant armature current, a constant braking effort, and a constant field current based on the traction motor field current sensed. A system and a computer software code are also disclosed for controlling a performance of the dynamic braking system to maintain the dynamic braking tractive effort current plateau and/or improve the dynamic braking tractive effort current plateau.

2006002, Feb 2, 2006

Jun 20, 2005

11/156399

Mark Nicolussi - Erie PA, US
Paul Hokanson - Girard PA, US
Ajith Kumar - Erie PA, US

H02P 5/00

318109000

A high-altitude railroad locomotive adapted for more reliable operation at high altitudes, wherein the high-altitude railroad locomotive includes a semiconductor electric power control component, and wherein due to the high altitude the locomotive would be exposed to high levels of cosmic radiation tending to damage the semiconductor electric power control component is provided. The high-altitude locomotive includes electric power generation equipment, a plurality of traction motors mechanically connected to wheels supporting the high altitude locomotive and an electric power transmission system for transmitting electrical power from the electric power generation equipment to the plurality of traction motors. A DC bus is also included and electrically connected to the traction motors and a power controller for controlling the transmission of power over the DC bus, the traction motors having a second active motor volume, wherein the second active motor volume is larger than the first active motor volume to enable the DC bus voltage of the high-altitude locomotive to be reduced relative to the first DC bus voltage while generating a range of mechanical power sufficient to propel the locomotive at high altitudes, whereby the combined effects on the semiconductor electric power control component caused by the DC bus voltage of the high-altitude locomotive and by the cosmic radiation correspond to these effects on the semiconductor electric power control components of the low-altitude locomotive when operating at low altitudes to reduce the likelihood of failure of the semiconductor electric power control component of the high-altitude locomotive.