27-02-2012, 04:54 PM
maglev train
final ppt maglev.ppt (Size: 501 KB / Downloads: 143)
Electromagnetic Suspension(EMS)
It works on the concept that electromagnetic forces attract to A metal or another electromagnet when they face each other with the opposing polarities.
The Trans rapid system currently used by maglev in shanghai uses (EMS) principle.
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 helium, and it's still in the experimental stage with many technical difficulties to be overcome.
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.
Levitation
The passing of the superconducting magnets by figure eight levitation coils on the side of the tract induces a current in the coils and creates a magnetic field. This pushes the train upward so that it can levitate 10 cm above the track.
The train does not levitate until it reaches 50 mph, so it is equipped with retractable wheels.
final ppt maglev.ppt (Size: 501 KB / Downloads: 143)
Electromagnetic Suspension(EMS)
It works on the concept that electromagnetic forces attract to A metal or another electromagnet when they face each other with the opposing polarities.
The Trans rapid system currently used by maglev in shanghai uses (EMS) principle.
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 helium, and it's still in the experimental stage with many technical difficulties to be overcome.
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.
Levitation
The passing of the superconducting magnets by figure eight levitation coils on the side of the tract induces a current in the coils and creates a magnetic field. This pushes the train upward so that it can levitate 10 cm above the track.
The train does not levitate until it reaches 50 mph, so it is equipped with retractable wheels.