Newbie question about maglev
Newbie question about maglev
(OP)
Hello all. I'm new to the forum, so please don't call me an idiot just yet. I have some questions about how to build a miniature maglev train. I don't want to use any electricity (ie no electo-magnets). So is it possible to to set up a guide rail and appropriate magnet configuration to float the car AND keep it stable? Also, I curious to know if you accelerate the car does the change in flux (one magnet passing by another) create an opposing EMF in the magnets and actually try to slow the car down. The reason I ask is due to an experiment in physics class where you drop a bar magnet through a tube and the magnet induces a current in the tube which creates an opposing emf and actually slows the magnet as it passes. I assume (maybe incorrectly) that magnets conduct electricity so I am curious to know what would happen.
Thank you for your help,
Nick
Thank you for your help,
Nick





RE: Newbie question about maglev
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What this means is that with say a rotary magnetic bearing you can support a shaft radially with passive bearings (i.e. fixed magnetic field such as from a permanent magnet) but it is not possible to control it passively in the axial direction at the same time; or vice versa.
With regard to the braking effect, yes indeed this will happen, it's referred to as eddy current braking and occurs whenever you have a magnetic field moving within a conductor. This is Faraday's law of electromagnetic induction and Lenz's law indicates that that the effect will be to oppose motion i.e. to brake.
RE: Newbie question about maglev
RE: Newbie question about maglev
http://www.llnl.gov/str/Post.html
Again thanks for the help.
RE: Newbie question about maglev