In conjunction with the mechanical brakes, the locomotive has dynamic braking. In this mode, each of the four traction motors acts like a generator, using the wheels of the train to apply torque to the motors and generate electrical current.
How many traction motors does a train have?
A modern locomotive is a hybrid. The diesel doesn’t drive the train; it cranks an alternator, which powers the six huge electric traction motors that actually turn the locomotive’s wheels. Each motor is set transversely between a pair of drive wheels.
How many motors are used in locomotive?
There are two types of AC motor, synchronous and asynchronous. The synchronous motor has its field coils mounted on the drive shaft and the armature coils in the housing, the inverse of normal practice.
What is traction motor in locomotive?
Traction motors are powered by electricity and generate the power to rotate the wheels of the train. The turning force produced by traction motors is transmitted to the wheels via the driving gear unit and axle. Traction motors are typically mounted in the trucks where the wheels are housed.
How many motors does an electric train have?
Modern electric locomotives, like their Diesel-electric counterparts, almost universally use axle-hung traction motors, with one motor for each powered axle.
How much can a locomotive pull?
That totals 27 MILLION pounds of weight pulled (or 14,000 tons). Depending on the type of locomotive, steepness of the grade of track, and sharpness of the curve in the railroad track, a loco may pull more or less weight.
How does a locomotive get traction?
All train cars have roller bearings on their axles, these bearings reduce friction which makes roll easy. The locomotive starts to move using sand if the wheels slip and that gives them traction. (If you would take a piece of sandpaper and rub it on a piece of steel you could feel it.)