The first locomotive to successfully use an AC (alternating current) three-phase asynchronous traction motor drive system was the German DE2500 diesel-electric in 1971, built by Henschel-BBC. DB ...

Diesel-electric locomotive technology has advanced ... sending electricity to axle-mounted traction motors. Their series-wound shunt motors were ideal for variable speed control from an eight ...

Electric traction is the norm, whether it comes from a trackside supply or from a diesel generator. In the middle of the last century, as the industry moved away from steam traction though ...