Patent ID: 7045981
Filing Date: 2006-05-16
Classification: B60L,Y02T

Abstract:
1. 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 as compared to a low-altitude locomotive having a similar semiconductor electric power control component operating at a first DC bus voltage and including traction motors having a first active motor volume providing a predefined range of mechanical power sufficient to propel the locomotive, the high-altitude locomotive comprising: 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 said electric power generation equipment to said plurality of traction motors, said electric power transmission system comprising a DC bus electrically connected to said traction motors and a power controller for controlling the transmission of power over said DC bus, said traction motors having a second active motor volume, wherein said 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 corresponding to that of the low-altitude locomotive and 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.