AC three-phase power transmission system for Amtrak´s new locomotives F69PH-AC

Advances in the field of three-phase drives for rail vehicles are described with reference to the power transmission system for the high-speed four-axle F69PC-AC locomotive. This model of locomotive incorporates state-of-the-art three-phase technology in the traction and head-end power systems. Traction converters, which are of the voltage-source inverter type with gate-turn-off 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 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 electrical losses. The locomotive and the inverters are micro-processor-controlled