That's very interesting. Maybe the equation F=q(E+vB) applies? If E=0 (electric field) and v=0 (velocity) then F=q(0 +0)=0. I still don't know for sure how to work out the height though. I know that the Maglev trains sit on their wheels until the train reaches 5mph. I'm ordering some 5mm^3 N50's...
oh, i assumed m=0.1kg. and I think the right part of the equation applies for a flat disk or a square. you could probably use less amperage for a ring? maybe I used the wrong value for permeability. i can't find the value for aluminium. if it's not right then maybe find an equation with...
for what you want to do, maybe it's just mg=BIL=(u0*I/2*pi*r)IL. rearrange for r. This actually gives believable figures. assuming L=0.2m and I=100amps you'll get 1.55cm levitation. note u0 is magnetic permeability. I don't know much about generating amperage. how do you get 100Amps?
@ Nuby
From looking into supercooling a little bit (and I mean a little bit), I think I get the impression that it will only induce diamagnetism (in the presence of electromagnets), which is very weak in comparison to permanent magnetism. Also, since supercooling leads to the Meissner effect...
true for the static case, but introduce dynamics (other forces) and I think it could be done practically. This website... http://www.hfml.kun.nl/levitation-possible.html discusses five ways to overcome the Theorem and another one might be to redistribute body weight on the board or grab a...
I reckon it could move in any direction. maybe have halback arrays side by side and end on end to make like a 3 square meter rink (small for economy purposes). I see what you mean about being unstable. It could be a problem. At first I'd be happy for it to roll around a bit because I reckon it...
quick replies. Great! I believe that just using your foot to touch the magnet bed and/or holding onto something up above might keep you balanced if it's just a wobble type of force. I'm not sure if there would be an actual force, like a strong force to pull the board over, hence overpowering...
G'day. I was wondering about the possibilities of making a permanent magnet hoverboard that levitates above a permanent magnet floor. They say that these new neodymium magnets can attract hundreds of kilos/pounds. Since repulsion and attraction forces are the same magnitude from what I hear, why...
I'm pretty sure you need to look at faradays laws of induction and diamagnetic levitation. I think though that you will need to use tremendous power to diamagnetically levitate stuff, even aluminium. Note that an aluminium ring is not a magnet, until you induce magnetism in it with the current...