Many single phase ac motors have been developed for traction purposes but only compensated series type commutator motor is found to be best suited for traction. Single phase induction motors have been abandoned as they are not capable of developing high starting torque.
Which motor is most suitable for traction?
The dc series motor is best suited for traction work, because:
- Torque is proportional to the square of armature current and speed is inversely proportional to torque.
- Torque is proportional to the square of armature current and speed is directly proportional to torque.
Which motor is more suitable for traction service Mcq?
For electric traction, DC series motors are best suited. DC series motors and AC series motors are very much recommended, as they provide a high starting torque Nowadays three-phase induction motors are also being used.
Which of the following motor is used in traction?
Explanation: DC motors are used for traction as, according to the characteristics of DC motors speed is inversely proportional to torque and square of armature current as well, if linear magnetization is concerned. Thus, DC motors are perfectly suitable for traction.
Which DC motor is used in traction?
DC series motor has been the most used solution for the traction of locomotives, trolleybuses, trams and others, characterized by a speed and torque control using additional resistances, which means a low efficiency, electromechanical contactors, high maintenance costs, dynamic braking in resistances.
Which motor is used in tramway?
Dc motor (Ma) and induction motor (Mc) are currently manufactured and used in 105 N tram drive, their parameters are available. Dc motor (Mb), brushless motor (Me) and slip-ring motor (Md) pa- rameters have been determined by analysis.
Which of the following is not the method of speed control of traction motors?
Which of the following is not the method of speed control in DC series motor? Explanation: Diverter means adding a variable resistance in parallel with field winding.
Which motor is not used for traction system?
DC shunt motors are not suitable for traction purpose, the reasons are given below: 1. The dc shunt motor is a constant speed motor and its speed-torque characteristic does not meet with the requirements of traction. i.e., the power drawn from supply mains varies directly as the load torque.
Which braking system on the locomotive is costly?
Vacuum braking on steam locomotives.
Which Indian city adopted electric traction first?
Railway electrification in India began with the first electric train, between Chhatrapati Shivaji Terminus and Kurla on the Harbour Line, on 3 February 1925 on the Great Indian Peninsula Railway (GIPR) at 1500 V DC.
What is non traction?
Traction Energy is consumed towards hauling of trains whereas Non-traction energy is towards offices, railway station, yards, residential, water supply, air conditioning, workshops, maintenance depots etc.
Which DC motor is preferred for constant speed?
DC Shunt-wound motor: This is an almost constant speed motor and its torque varies nearly as the current.