Traction Drives

Features of Traction Drives

Features of Traction Drives: Various Features of Traction Drives are: 1. Large torque is required during start and acceleration in order to accelerate the heavy mass. 2. The motor is subjected to torque overloads during acceleration and when negotiating up gradients. 3. Because of economic reasons single phase supply is used in ac traction. Indian …

Features of Traction Drives Read More »

Braking System in Train

Braking System in Train: Braking System in Train has number of advantages over mechanical braking. It reduces wear and tear on rails and wheels, substantially increasing their life. It is smooth, fast and can be precisely and automatically controlled. On the other hand, mechanical brakes require frequent maintenance, particularly when subjected to heavy duty as …

Braking System in Train Read More »

Driving Axle Code for Locomotives

Driving Axle Code for Locomotives: Driving Axle Code for Locomotives – Weight of the locomotive is supported on axles which are coupled to wheels. The weight per axle is limited by the strength of the track and bridges, and usually varies between 15 and 30 tons. Total number of axles is calculated by the following …

Driving Axle Code for Locomotives Read More »

Duty Cycle of Traction Drives

Duty Cycle of Traction Drives: The Duty Cycle of Traction Drives in trains is explained with the help of speed-, torque- and power-time diagrams (Fig. 10.6) which are drawn for travel between two consecutive stations on a levelled track. The train is accelerated at the maximum permissible torque, giving constant maximum acceleration. The power increases …

Duty Cycle of Traction Drives Read More »

Coefficient of Adhesion in Traction

Coefficient of Adhesion in Traction: In Coefficient of Adhesion in Traction, the task of driving equipment consists of pushing the carriage on which it is mounted and pulling coaches and wagons behind it. Wheels coupled to the motors, either directly or through a reduction gear, are known as driving wheels. When motors run, driving wheels …

Coefficient of Adhesion in Traction Read More »

Nature of Traction Load

Nature of Traction Load: Nature of Traction Load describes as when the train runs at a constant velocity on level track, a number of frictional forces oppose its motion. The friction at bearings, guides etc. is classified as Internal Friction. The rolling friction between wheels and rails, and friction between wheel-flanges and rails is termed …

Nature of Traction Load Read More »

Electric Traction Services

Electric Traction Services: Electric Traction Services can be broadly classified as: Electric Trains. Electric buses, trams (or tramways) and trolleys. Battery driven and solar powered vehicles. Electric Trains: Electric trains run on fixed rails. They are further classified as Main Line Trains and Suburban Trains. Main Line Trains: Intercity passenger and goods trains which come …

Electric Traction Services Read More »