How do the trains that run on electro-magnets work?

Question

How do the trains that run on electro-magnets work?

Answer 1

The phenomenon is called as Magnetic Levitation(Maglev), and the trains that runs on this principle is called Maglev Trains. There are two methods in which these trains work. They are:

1. Electromagnetic suspension

2. Electrodynamic suspension

Electromagnetic suspension:

In current EMS systems, the train levitates above a steel rail while electromagnets, attached to the train, are oriented toward the rail from below. The electromagnets use feedback control to maintain a train at a constant distance from the track.

Electrodynamic suspension



EDS Maglev Propulsion via propulsion coils

In Electrodynamic suspension (EDS), both the rail and the train exert a magnetic field, and the train is levitated by the repulsive force between these magnetic fields. The magnetic field in the train is produced by either electromagnets (as in JR-Maglev) or by an array of permanent magnets (as in Inductrack). The repulsive force in the track is created by an induced magnetic field in wires or other conducting strips in the track.

At slow speeds, the current induced in these coils and the resultant magnetic flux is not large enough to support the weight of the train. For this reason the train must have wheels or some other form of landing gear to support the train until it reaches a speed that can sustain levitation.

Propulsion coils on the guideway are used to exert a force on the magnets in the train and make the train move forwards. The propulsion coils that exert a force on the train are effectively a linear motor: An alternating current flowing through the coils generates a continuously varying magnetic field that moves forward along the track. The frequency of the alternating current is synchronized to match the speed of the train. The offset between the field exerted by magnets on the train and the applied field create a force moving the train forward......

Answer 2

All electric trains run on electro-magnets, but I think you are asking about those using linear electric motors, go here for more information;

http://en.wikipedia.org/wiki/Linear_moto...

Answer 3

small elves push em

Answer 4

checl out the vids on this site

http://www.500kmh.com/