| Abstract |
The new developments in the field of three-phase drives for rail vehicles are described by means of the power transmission system for the high-speed, 4-axle F69PH locomotive as developed jointly by General Motors (GM) and Siemens AG for Amtrak, USA. Traction converters, which are of voltage-source inverter type with gate-turnoff thyristors, supply power to the squirrel-cage three-phase induction motors which are connected in parallel within each bogie. In addition to the two traction inverters, a third inverter is installed in order to supply power to the passenger cars. All three inverters are identical and utilize the evaporation bath cooling method to dissipate the heat caused by the electrical losses. The locomotive, as well as the inverters, are microprocessor
controlled. |
