Polyphase AC Motors for Traction Drives: Polyphase AC Motors for Traction Drives - Advantages of ac motors over dc we already know. Because of negligible maintenance, ruggedness and higher power per unit weight or volume,…
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 and suburban traction, 750 V dc underground traction and…
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are now widely used both in ac and dc tractions involving dc and ac motors, and the conventional drives have all become outdated, and will be phased out in near…
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 resistance control are: 1500 V dc traction…
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 torque overloads. With an increase in torque, the flux…
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…
Traction Drive Rating and Energy Consumption: Traction Drive Rating and Energy Consumption - The speed-time curve of Fig. I0.6(a) is reproduced in Fig. 10.9. For simplification in calculations, it is approximated by a trapezoidal curve…
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…
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…
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…
