aliced25 - 2-2-2011 at 16:20
Ok, I'm looking into something right at the moment and there doesn't appear to be all that much information on it.
How do I calculate (and model) repulsive force between magnets?
I'm thinking of a levitating design, that would, if it worked reduce the force of gravity on a load, via offsetting that gravitational pull with
magnetic repulsion. Earnshaw's theorem notwithstanding, it has been done, I'm just stuck on how to calculate/model the same.
Twospoons - 2-2-2011 at 16:59
FEMM 4.0 is your friend here. only 2D though.
aliced25 - 2-2-2011 at 17:36
Yeah, I'm using it, but how to I turn the force-lines into useable data on the repulsive force? I mean, I'm seeing precisely the same flux lines as
I'd expect, but trying to determine the relationship between the force bearing down on a magnet (pressing it down toward another) is kind of hard to
model. I realise the pull-force and push-force are, all things being the same, equivalent, but how to ascertain the amount of weight that can be held
above a magnet via magnetic repulsion?
Twospoons - 2-2-2011 at 18:09
select the magnet block, choose ' integrate', choose' force by weighted stress tensor'. This should give you the force on the block as x and y
components. The manual has more detail. You can get torque in a similar way.
aliced25 - 4-2-2011 at 05:36
Ok, I'll try that - also found how to import the solutions (and materials) into Mathematica. Once I sort that shit out, I can really have some fun.
Any suggestions on the LUA scripting console? I've been struggling to find anything basic enough for me to wrap my head around.