Three-phase power supplying system for induction motor of the diesel-electric locomotive

In the railway traction systems, an important role play diesel-electric locomotive. The AC traction motor proves its advantages compared to the DC older motor, but the supply (the power inverter) is more sophisticated and expensive and, in many cases, not too safe. The authors propose for diesel-electric locomotive a different version of supplying system, based on amplitude modulation and cheap and safe power semiconductor: power thyristor, GTOpsilas or even triacs. The paper presents a possible principle of operation for this original supply version.