material for an electro magnet
material for an electro magnet
(OP)
What would be the lightest material be to use for an electro magnet, but not sacrificing to much power or performance
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material for an electro magnet
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RE: material for an electro magnet
How much does it need to pick up?
Will it always pick up "steel" and iron?
Will it need to be protected against rust and corrosion?
Do you have a good power supply available?
Do you need the electromagnetic to completely "clear" of residual magnetism, or will a little retention of a magnetic field be OK for your project?
What is important? Size? Weight? Cost?
Duplicate cost to build a second magnet? To build 150,000 duplicate magnets?
Cheapest and easiest for regular dumb projects is a soft iron core wrapped with many thousand turns of the insulated conductor to carry the DC current, next is mild steel.
RE: material for an electro magnet
Its a one off electric motor just building it for fun so cost isn't a real issue but I figured that if I am going to build one I might as well build and awesome one.
Does the whole mass of the stator contribute to the power of the magnet or is it just the part that is wound with wire, eg would a solid metal stator generate the same energy as say a carbon fire stator fitted with metal fingers wrapped with wire, assuming every thing else was equal.
Thanks for your feed back
RE: material for an electro magnet
Hints:
Carbon fiber will be of absolutely no use to you.
Motor magnetic circuits are very often made of laminated silicon steel. To find out why, read up on 'eddy currents'.
Mike Halloran
Pembroke Pines, FL, USA
RE: material for an electro magnet
Wind a bar magnet an a horse shoe magnet. A bar magnet will have a larger air gap than a similar sized horse shoe magnet.
Hint: Magnetizing force is dependent on Amp turns. As a first order approximation, twice as many turns means twice the resistance, half the current and the same number of Amp turns.
Magnet strength depends more on the wire gage.
More turns gives less 12R loss in the magnet.
More turns means more induction.
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: material for an electro magnet
RE: material for an electro magnet
Radio Shack used to carry his books, but I haven't seen them there for a while.
Jameco does carry them:
http://www.jameco.com/webapp/wcs/stores/servlet/Pr...
Jameco also carries some of his other books, and some related kits that may interest you.
Or go right to the source:
http://www.forrestmims.org/
Mike Halloran
Pembroke Pines, FL, USA