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| Maglev Train |
Was going through my physics book today, found this interesting- Maglev Vehicles.
Maglev is short for Magnetically Levitated. These are vehicles which travel at very good speeds by avoiding friction.
These are controlled by electromagnets, both inside the vehicles and on the tracks.
These are built up on the principle that a superconductor does not allow magnetic flux through it, or simply, it repels magnetism.
So how does it work?
The tracks have a continuous "on-off" switching between their electromagnets. So when they're on, they repel, when off, they attract. If the switch between attraction and repulsion is really quick, then the vehicle starts to levitate or float.
Further, to make it move, this switching is made to flow across the guide(track) this makes the maglev vehicle to move along the guide. Since the vehicle is floating above a track, there is no friction, and so, the vehicle can move really fast. There's an interesting video which explains this. Here's a link, https://www.youtube.com/watch?v=aIwbrZ4knpg
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