18-04-2011, 11:49 AM
PRESENTED BY-
Arvind Singh
Arvind singh.ppt (Size: 443.5 KB / Downloads: 141)
What is maglev train ?
Maglev trains are the fastest trains in the world! Maglev is short for magnetic levitation which basic principles involve the use of magnetism to levitate an object .
Maglev trains are theoretically capable of speeds upwards of 4,000 miles per hour if operating in a vacuum. The highest recorded speed for a maglev train is 581 kilometres per hour. This record was set by a Japanese experimental maglev train in 2003.
Origin of maglev tech.
The first serious maglev research was done by British researcher Eric Laithwaite in the 1960s.
In 1979, the first passenger-carrying maglev train entered service in Hamburg, Germany.
The first operating maglev system was built in Britain, at the Birmingham airport in 1984, where it was used as a people mover.
How maglev train work?
Maglev trains use the basic principle of magnetism to force the train upwards above the track surface. The simple way of visualizing this is to imagine the train repelling away from the track surface.
How maglev train move ?
It uses the principles of linear induction and magnetism to propel the train forwards or backwards. The combination of repulsive and attractive magnetic forces cause the train to move towards a region of track. In the same fashion, to slow down the train while it is moving, we must apply the repulsive and attractive forces in such a way opposite to which the motion started.
Levitation System’s Power Supply
Batteries on the train power the system, and therefore it still functions without propulsion.
The batteries can levitate the train for 30 minutes without any additional energy.
Linear generators in the magnets on board the train use the motion of the train to recharge the batteries.
Levitation system uses less power than the trains air conditioning.
The Maglev Track
The magnetized coil running along the track, called a guideway, repels the large magnets on the train's undercarriage, allowing the train to levitate.
Following fig. show the track for maglev
The following diagrams below show the side view and top view of the track.
Magnetic Levitation (Track Side View):
--N---N---N---N---N---N
=================
n---n----n---n----n---n---n
Maglev Propulsion (Top Down View):
n---s----n---s----n---s---n
=================
--N---S---N---S---N---S +++>
=================
n---s----n---s----n---s---n
Propulsion System
When the alternating current is reversed, the train brakes.
• Different speeds are achieved by varying the intensity of the current.
Types of Maglev Propulsion
There are three basic types of maglev propulsion:
Electromagnetic suspension uses the attractive magnetic force to lift the train.
Electrodynamic suspension uses the repulsive magnetic force to lift the train away from the rail
Stabilized permanent magnet suspension uses opposing arrays of permanent magnets to suspend the train above the guide way.
Application Information
This system is not ready for use now, but it should be ready in a few years.
It’s top speed with people aboard is 350 mph.
The super conducting magnets create a strong magnetic field that could be a problem for some passengers.
The train is earthquake proof because the greater space (10 cm) between the track and the train leaves more room for track deformation
Linear generators will produce all the electricity needed in the train’s interior.
Only the part of the track that is used will be electrified so no energy is wasted.
The Future of Maglev Trains
There are currently more than a dozen proposals for high speed maglev trains in various stages of review in countries around the world.
There also plans under consideration for maglev systems in India, Pakistan and the United States
“Mumbai to Delhi: Three Hours by Train.” Express India.
Summery
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.
Governments have mixed feelings about the technology. Some countries, like China, have embraced it and others like Germany have balked at the expense.
Arvind Singh
Arvind singh.ppt (Size: 443.5 KB / Downloads: 141)
What is maglev train ?
Maglev trains are the fastest trains in the world! Maglev is short for magnetic levitation which basic principles involve the use of magnetism to levitate an object .
Maglev trains are theoretically capable of speeds upwards of 4,000 miles per hour if operating in a vacuum. The highest recorded speed for a maglev train is 581 kilometres per hour. This record was set by a Japanese experimental maglev train in 2003.
Origin of maglev tech.
The first serious maglev research was done by British researcher Eric Laithwaite in the 1960s.
In 1979, the first passenger-carrying maglev train entered service in Hamburg, Germany.
The first operating maglev system was built in Britain, at the Birmingham airport in 1984, where it was used as a people mover.
How maglev train work?
Maglev trains use the basic principle of magnetism to force the train upwards above the track surface. The simple way of visualizing this is to imagine the train repelling away from the track surface.
How maglev train move ?
It uses the principles of linear induction and magnetism to propel the train forwards or backwards. The combination of repulsive and attractive magnetic forces cause the train to move towards a region of track. In the same fashion, to slow down the train while it is moving, we must apply the repulsive and attractive forces in such a way opposite to which the motion started.
Levitation System’s Power Supply
Batteries on the train power the system, and therefore it still functions without propulsion.
The batteries can levitate the train for 30 minutes without any additional energy.
Linear generators in the magnets on board the train use the motion of the train to recharge the batteries.
Levitation system uses less power than the trains air conditioning.
The Maglev Track
The magnetized coil running along the track, called a guideway, repels the large magnets on the train's undercarriage, allowing the train to levitate.
Following fig. show the track for maglev
The following diagrams below show the side view and top view of the track.
Magnetic Levitation (Track Side View):
--N---N---N---N---N---N
=================
n---n----n---n----n---n---n
Maglev Propulsion (Top Down View):
n---s----n---s----n---s---n
=================
--N---S---N---S---N---S +++>
=================
n---s----n---s----n---s---n
Propulsion System
When the alternating current is reversed, the train brakes.
• Different speeds are achieved by varying the intensity of the current.
Types of Maglev Propulsion
There are three basic types of maglev propulsion:
Electromagnetic suspension uses the attractive magnetic force to lift the train.
Electrodynamic suspension uses the repulsive magnetic force to lift the train away from the rail
Stabilized permanent magnet suspension uses opposing arrays of permanent magnets to suspend the train above the guide way.
Application Information
This system is not ready for use now, but it should be ready in a few years.
It’s top speed with people aboard is 350 mph.
The super conducting magnets create a strong magnetic field that could be a problem for some passengers.
The train is earthquake proof because the greater space (10 cm) between the track and the train leaves more room for track deformation
Linear generators will produce all the electricity needed in the train’s interior.
Only the part of the track that is used will be electrified so no energy is wasted.
The Future of Maglev Trains
There are currently more than a dozen proposals for high speed maglev trains in various stages of review in countries around the world.
There also plans under consideration for maglev systems in India, Pakistan and the United States
“Mumbai to Delhi: Three Hours by Train.” Express India.
Summery
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.
Governments have mixed feelings about the technology. Some countries, like China, have embraced it and others like Germany have balked at the expense.