15-12-2012, 06:48 PM
MAGLEV TRAIN
1MAGLEV.ppt (Size: 1.4 MB / Downloads: 150)
INTRODUCTION
First described by Robert Goddard, American Rocket Scientist, 1909 Scientific American.
Maglev is the best alternative for means of transport.
Maglev is noiseless ,friction less , and require no maintenance.
The lack of friction allow maglev vehicle to travel at a speed over 300 miles/hr.
Electrified transport reduces pollution.
What is Maglev?
Magnetic levitation (maglev) is a relatively new transportation technology in which non-contacting vehicles travel safely at speeds of 250 to 300 miles-per-hour or higher while suspended, guided, and propelled above a guideway by magnetic fields.
Levitation by attraction
Levitation by attraction Common knowledge of magnetism shows that opposite magnetic poles attract each other. This basic principle is how this type of Maglev train appears to float closely to the track. In order for the train to float, there must be two coils. The top coil is installed in the train and the bottom coil is placed in the track. Attraction is caused by having the currents within each of the circuits traveling in the same direction.
Levitation by repulsion
Levitation by repulsion Common knowledge of magnetism shows that similar poles of a magnet repel each other. This basic principle is how this type of Maglev train appears to float on a cushion of air. In order for the train to float, there must be two coils. The top coil is placed within the train and the bottom coil is place on the track. The current in the top circuit travels in the opposite direction of the current in the bottom; resulting in repulsion between two coils.
Electrodynamic suspension(EDS)
It works on the concept of repulsive magnetic forces when electromagnets face each other with the same polarities. The EDS system uses superconductors cooled with liquid, and it's still in the experimental stage with many technical difficulties to be overcome.
CONCLUSION
They consume less energy.
Time consuming.
Since there is no friction these trains
can reach high speeds.
It is a safe and efficient way to travel.
Initial cost is very high.