The locomotive that uses an electric transmission is known as a diesel-electric locomotive. These locomotives bore with equipment slight variation to electric locomotives. The most vibrant part is the diesel engine, the main power source for the loco. It contains a large cylinder block, with the cylinders arranged in a straight line or in a v shape.
Alternators generate ac electricity, which is used to provide power for the traction motors mounted on the bogies. Auxiliary alternators are equipped in these trains to provide ac power for lighting, heating, air conditioning, dining facilities etc. On the passenger train. The output is transmitted along the train through an auxiliary power line.
motor blowers, air intakes, rectifiers and inverters are equipped in these locomotives. The diesel engine equipped a battery to start it and to provide electrical power for lights and controls when the engine is switched off and the alternator is not running. Traction motors operated both in ac and dc current. Fuel tanks contained with diesels in these locomotives upto some thousand gallons. The air compressors provide a constant supply of compressed air for the locomotive and train brakes.
