“Magnetic-Levitation” literally means floating in air. Working concept behind Ultra-high speed / Supersonic trains Technology of Maglev There are two primary types of maglev technology: Electromagnetic suspension (EMS) uses the attractive magnetic force of a magnet beneath a rail to lift the train up. Electrodynamics suspension (EDS) uses a repulsive force between two magnetic fields to push the train away from the rail.
Working Principle Whenever a magnet sweeps across a conducting ladder, it tends to drag the ladder along with it This horizontal tractive force is also accompanied by a vertical force of repulsion, which pushes away the magnet This forms the basis for working of a magnetically levitated train
Pros and cons of different technologiesTechnology Pros ConsEMS Magnetic fields inside and outside the The separation between the vehicle and the vehicle are insignificant guide way must be constantly monitored and Proven commercially available corrected through computer systems to avoid technology with high speeds (500km/h) collision due to the unstable nature of No wheels or secondary propulsion electromagnetic attraction system needed Large margin between rail and train Strong magnetic fields would make the trainEDS enable highest recorded speeds inaccessible to passengers with magnetic (581km/h) and heavy load capacity storage media like hard-drives and credit cards, necessitating the use of magnetic shielding Recently demonstrated (Dec 2005) successful operation Using high Vehicle must be wheeled for its travel at low temperature superconductors cooled with speeds cost inexpensive liquid nitrogen System per mile cost is still considered prohibitive
Advantages of Maglev 50% reduction in Locomotive Weight 60% reduction in Power/ Fuel consumption No-Maintenance at all No-Friction (Air-resistance) Less Noisy Economical High Speeds Accidents are very rare Time is Saved Extremely Safe (even under Earth-Quakes) Complete Automatisation is possible (Driverless system)
Disadvantages of Maglev Installation Costs are too high because of Maglev guide paths Lack with the existing infrastructure
Conclusions: Though installation being very costly, this system can prove to be economical with overall consideration of Energy consumption, Pollution, and Safety. There is a lot of Future scope for Development and Implementation of such technology even in developing countries like INDIA.