Ideas: maglev trains (1 Viewer)

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can someone help me on this aspect plz...

i've read Jacaranda, but....

 

[ND]

What exactly don't you understand?

 

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well...

EDS system uses superconducting magnets on the vehicle and electrically conductive strips or coils in the guideway to levitate the train.

what does it mean by that bold part...i'm assuming that this is using the idea that a superconductor lead the leviation of the magnet(pg257 of Jacarnada)

edit: by saying that, i mean it creates a current in the superconductor and that it creates a magnet pole that causes repulsion...
but if the train moves...will this levitation effect still take place between magnet and superconductor

 

[ND]

They are exactly that - strips made of conducting material which levitate the train by the meissner effect.

 

[Dash]

You see, superconductors (when at critical temp) have a zero magnetic field inside them. Any external magnetic field that tries to penetrate the the superconductor will be pushed out by induced currents (within the SC) that gives rise to a magnetic field that creates a repulsive force on the magnet, causing it to levitate (the meissner effect).

Now in relation to Mag Lev trains, the coils on the sidewalls have a current induced in them by the on-board superconducting magnets. This makes the coils act as temporary electromagnets when the superconductors pass them. Therefore, there are forces pushing the superconducting magnets upwards, and ones which pull them down simultanously, thereby levitating the train.

For more info, refer to the link below:
http://www.rtri.or.jp/rd/maglev/html/english/maglev_frame_E.html

 

[Rahul]

Originally posted by ...
by saying that, i mean it creates a current in the superconductor and that it creates a magnet pole that causes repulsion...

no! the meissner effect involves a superonducting material and a magnet.
you will have a magetic[permanent, although i wonder what it would be like with an AC electromagnet maybe its an idea for wonderland] ok so back to this...you will have a magnet and a superconductor. the magnet will be the 'train tracks' and the superconductor will be the bit attatched to the train. there is a nice pic in the jac book.
well thats the basic set-up.
you may want to know the advantages and limitations of using maglec trains, which is again in jac somehwere

 

[Dash]

I got the info from the site in my post.
It is a description of an actual mag lev train and how it works.

EDIT: Refer to this link, and read under the heading: Principal of Magnetic Levitation
http://www.rtri.or.jp/rd/maglev/html/english/maglev_frame_E.html

 

[MyLuv]

you will have a magnet and a superconductor. the magnet will be the 'train tracks' and the superconductor will be the bit attatched to the train

Actually,like Dash said,the train use a superconducting magnet to induce a current in coil along the track 'n levitate it(this way no magnet is needed on the track-maybe coz magnet get weaker after times-and no the current is need thus save power )

 

[bails]

Do you think the chances of Mag Lev trains being asked is high this year? I havnt seen it in the last two years, just wonderin

 

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Originally posted by bails
Do you think the chances of Mag Lev trains being asked is high this year? I havnt seen it in the last two years, just wonderin

hard to say...

 

[haz_it_all]

hey ND who is that chick in ur display pic.....dayaaaaam she fine