Electric Locomotive
Specific Energy Consumption of High Speed Rail as compared to Semi-HSR
Last updated on April 5th, 2015 at 06:16 am There is a general belief that the train resistance (resulting high specific energy consumption) of high-speed train is high as compared to normal speed train. The UIC sponsored study proved it otherwise with following arguments explained in the discussion Curve Resistance: High speed Rail routes had […]
Current Developments in the field of Traction motors
SINGAPORE Mass Rapid Transit Corporation (SMRT) has awarded a contract worth more than Yen 8bn ($US 80.5m) to Toshiba, Japan, to re-equip a fleet of 66 six-car metro trains with permanent-magnet synchronous traction motors. The new motors are being fitted as part of the refurbismet of the existing drive equipment, the first such upgrade since […]
Suspension System
Last updated on April 5th, 2015 at 06:14 am The track irregularities and their interaction with wheel generate vibration of varying amplitude and frequency. These vibrations may cause damage to different parts of the vehicle if not contained and also return it back to the track. These vibrations are contained by suspension arrangement. Elements of […]
Axle Box
Last updated on May 31st, 2013 at 04:11 pm Axle Box A device which supports weight of the vehicle and transfer it to wheel and permits its rolling as well as longitudinal motion. Axle box transmits longitudinal, lateral and vertical forces from wheel set to other parts of the suspension system Axle Box consists of […]
Wheel Sets
Last updated on April 5th, 2015 at 06:14 am A wheel set consists of two wheels rigidly connected by a common axle and provides Necessary distance between track and vehicle to support equipment mounted on under-frame Guidance for motion to contain within track gauze Transfer of vertical load to the rail Transfer of tractive and […]
Suspension System of Railway Vehicle
Last updated on April 5th, 2015 at 06:14 am Movement of Railway vehicle on Rail is a guided movement, different as compared to road. This system is complex with having many degrees of freedoms making the study of vehicle dynamics a challenging subject from the beginning of industrial revolution Mechanical system provides Transfer and balancing […]
Traction Mechanics – Numerical Problems
Last updated on June 22nd, 2013 at 01:15 am Q 1: A train weighing 5000T starts by a locomotive weighing 125T. The starting resistance of locomotive and train are 6 & 4kg/T respectively. What is the total train resistance at the start? 5000*4+125*6=20750Kg Ans: =20.75T Q 2 : A train weighting 1500T […]
Permanent Magnet Synchronous Motor
Last updated on June 13th, 2013 at 12:32 pm Permanent Magnet synchronous motor popularly called PMSM uses rare earth permanent magnet at the rotor as compared to field winding. With recent advancements of permanent magnet, solid state devices and micro-electronics have helped in making use of this motor for traction purpose. To begin with, […]
Synchronous Motor as Traction Motor
Last updated on April 5th, 2015 at 06:14 am Synchronous machines are used as Generator or Condenser motor and never as traction motor before advent of variable frequency drives. The motor consists of stater equipped with three phase stater winding and rotor with DC field excitation. DC field may be with salient or non-salient poles or with permanent magnet. […]
Three Phase Induction Motor as Traction Motor
Last updated on April 5th, 2015 at 06:14 am Right from the introduction of electric traction, there was a strong desire to use Three phases Induction Motor for Traction application. This could only be possible with the introduction of variable voltage variable frequency control. Working Principle of Three Phase Induction Motor AC induction motor is […]