HI,
I want to build an electromagnet, but I don't know how to determine the parts.
Can someone help me with the construction details?
I have a 2000 Gauss, 1 inch round permanent magnet. I want to duplicate the 2000 Gauss strength in an electromagnet with a 3/4 inch diameter, 2 inch length solid metal core.
The questions are:
What kind of metal should the core be? (I want minimum remanence)
What kind of wire should I use?
What gauge winding wire should I use?
How many turns do I need to make?
What other information do I need?
How do I find out how many watts are needed to make it work?
Have a good one all.
Thanks
I have a 2000 Gauss, 1 inch round permanent magnet. I want to duplicate the 2000 Gauss strength in an electromagnet with a 3/4 inch diameter, 2 inch length solid metal core.
Who are you and why did you post this?
I posted it because I don't know the specs on how to make an electromagnet like I want. This seemed like a place where I could get this information. Am I wrong?
I am someone messing around with magnets and electromagnets, like a lot of others. Are you asking me for my name, address and phone number?
@newbie
If you want to make a strong electromagnet check this topic:
http://www.overunity.com/index.php?topic=5929.0;topicseen
Jesus
Quote from: nievesoliveras on December 01, 2008, 09:56:40 PM
@newbie
If you want to make a strong electromagnet check this topic:
http://www.overunity.com/index.php?topic=5929.0;topicseen
Jesus
Thanks Jesus,
I read every post in that thread, unfortunately I still don't know what gauge wire to use or the number of turns. I do have a better grasp about materials, but again there was no conclusion on what was best.
Little by little I am learning what I need to know.
Thanks for the help.
A close approximation:
(1) H in Oersted= (.4 x 3.14 x N x I)/coil length in cm
(2) B in Gauss = (H x (core permeability x 0.00000125664)) x 10000
So if 2,000 Gauss needed with core permeability of 800u:
H= 2000/10.05312 = 199
(rearrangement of (2))
H = (.4 x 3.14 x N x I) / 5.08 = 199
N x I = (199 x 5.08) / 1.256 = 805 ampturns
So you could use:
N x I = 805 turns x 1 amp = 805 ampturns
805 turns of #22 AWG = 8.3 ohms
I=V/R : 9volts / 8.3 ohms ~ 1
So 805 turns of #22 AWG at 9 volts on a 800u permeability core (1010 steel) will achieve a close approximation of around 2000 Gauss.