The Transrapid is a train known as “Magnetic Levitation Train”. In fact this train travels without touching the rails because it is carried along by the strength of the magnets. So the frictions with the rails which prevents the classic trains from going faster, disappear. Without the frictions, the transrapid needs less energy than a classic train, and it can attain 460km/h.
The contrary poles always attract themselves and the similar poles repulse themselves. The magnetic levitation train works thanks to this system.
On every side of the train, some magnets are placed in line. Those magnets are placed alternately, so the poles are south, north, south, north, etc… On the rails, it’s the same but with electromagnets.
We have seen that two similar magnets repulse themselves and two contrary magnets attract themselves. When the electromagnets are powered, they have the same properties as magnets. According to its place on the rail, it stays on the premises or it advances of one place for being in equilibrium as much as possible. When the train has moved over one magnet, we reverse the current which crosses the electromagnets of the rails and so the polarisation is inverted. The train continue to advance. And this operation, repeated thousands of times, allows the train to advance thanks to magnetic levitation.
With the advantages this train has, we may predict a bright future, but will safety win out against cost?