17-07-2014, 04:25 PM
A SEMINAR ON MAGLEV
A SEMINAR ON MAGLEV.pptx (Size: 759.62 KB / Downloads: 24)
Levitation
The train does not levitate until it reaches 50 mph, so it is equipped with retractable wheels.
The passing of the superconducting magnets through levitation coils on the side of the track induces a current in the coils and creates a magnetic field. This pushes the train upward so that it can levitate 10 mm above the track.
Propulsion
An alternating current is ran through electromagnet coils on the guide walls of the guide way. This creates a magnetic field that attracts and repels the superconducting magnets on the train and propels the train forward.
Braking is accomplished by sending an alternating current in the reverse direction so that it is slowed by attractive and repulsive forces.
Lateral Guidance
When one side of the train nears the side of the guideway, the super conducting magnet on the train induces a repulsive force from the levitation coils on the side closer to the train and an attractive force from the coils on the farther side. This keeps the train in the center
Types of Maglev Trains
Based on the techniques used for Levitation there are two types of Maglev trains
Electro magnetic Suspension -Attractive
Electro dynamic Suspension –repulsive
Inductrack
INDUCTRACK
The Inductrack is a newer type of EDS that uses permanent room-temperature magnets .
There are two Inductrack designs:
Inductrack I and
Inductrack II.
Inductrack I is designed for high speeds, while Inductrack II is suited for slow speeds.
If the power fails, the train can slow down gradually and stop on its auxillary wheels.
applications
NASA plans to use magnetic levitation for launching of space vehicles into low earth orbit.
Boeing is pursuing research in MagLev to provide a Hypersonic Ground Test Facility for the Air Force.
The mining industry will also benefit from MagLev.
There are probably many more undiscovered applications
CONCLUSION
Maglev trains use magnets to levitate and propel the trains forward.
Since there is no friction these trains can reach high speeds.
It is a safe and efficient way to travel.