Traction Drives

Traction Drives:

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 …


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 …


Conventional DC and AC Traction Drives : The commonly used Conventional DC and AC Traction Drives are The dc Traction Drives Employing Resistance Control: The dc traction drives employing …


CSI Squirrel Cage Induction Motor Drive : Performance and operation of CSI induction motor drive is already explained . Figure 10.23 shows details of the traction drive …


DC Traction : DC Traction using Semiconductor Chopper Controlled DC Motors: Chopper control has replaced resistance control in all dc traction schemes, such as 1500 V dc main line …


Diesel Electric Traction System : Because of high initial cost, electric traction is justified only where there is sufficient volume of traffic. Diesel Electric Traction System is …


Driving Axle Code for Locomotives : Driving Axle Code for Locomotives โ€“ Weight of the locomotive is supported on axles which are coupled to wheels. The weight …


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) …


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 …


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 …


Load Commutated Inverter Fed Synchronous Motor Drive : Load Commutated Inverter Fed Synchronous Motor Drive is shown in Fig. 10.22. The inverter is a current source inverter …


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 …


Polyphase AC Motors for Traction Drives : Polyphase AC Motors for Traction Drives โ€“ Advantages of ac motors over dc we already know. Because of negligible maintenance, …


PWM VSI Induction Motor Drive : PWM VSI Induction Motor Drive for traction is shown in Fig. 10.21. A pulsewidth modulated voltage source inverter converts dc into …


PWM VSI Squirrel Cage Induction Motor Drive : The PWM VSI Squirrel Cage Induction Motor Drive is shown in Fig. 10:24. dc link is supplied from ac …


Semiconductor Converter Controlled Drives : These are now widely used both in ac and dc tractions involving dc and ac motors, and the conventional drives have all …


Traction Drive Rating and Energy Consumption : Traction Drive Rating and Energy Consumption โ€“ The speed-time curve of Fig. I0.6(a) is reproduced in Fig. 10.9. For simplification …


Traction Motors : Motors Employed in Traction : Earlier, dc series motor was widely used in Traction Motors. It has high starting torque and capability for high …