Electromagnet core shape vs field strength/shape
Electromagnet core shape vs field strength/shape
(OP)
Assuming the copper winding and overall core dimensions are identical, how does the shape of a core at its ends affect magnetic field strength and shape?
Flat edge VS sharp tip
(see attached PDF)
http://fil es.enginee ring.com/g etfile.asp x?folder=2 4a3096d-ee ab-4e19-a6 e1-fd59443 d3d5b& file=Core_ Shapes.pdf
Thanks!
Flat edge VS sharp tip
(see attached PDF)
http://fil
Thanks!





RE: Electromagnet core shape vs field strength/shape
What is the purpose of this device (inductor or electromagnet?)
Can you explain what you mean by that? Does it have any relation to attached figure?
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(2B)+(2B)' ?
RE: Electromagnet core shape vs field strength/shape
I'm under the understanding that magnetic fields concentrate around sharp edges. If that's the case, it makes me wonder if a core that came to a sharp point at both ends would be stronger than one that was flat on each side. If not, it must have some effect still (in which case, I'm still curious about).. But I don't know enough about electricity and magnetism to decipher the all the variables.
This is for an electromagnet.
The "flat edge VS sharp tip" thing is depicted in my attachment. I drew up 3 different models to clarify what I meant (the first is an example of the common "flat" core edge electromagnet, and the other two are variations of my concept regarding a "sharp tip" core)
RE: Electromagnet core shape vs field strength/shape
A pointed tip might possible create higher local flux density at the tip, but who cares it doesnt' buy you any holding power.
If you are looking for holding power, a flat surface of your will core will hold on to an attached flat steel piece much better than an irregular/pointed surface.
Also something to consider, U-shaped core such that the thing you're picking up bridges accross the U will tend to create much higher flux density (up to the point of saturation) and holding power than a geometry which does not complete the flux path.
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(2B)+(2B)' ?
RE: Electromagnet core shape vs field strength/shape
Ok... So (just to really drive this home for me) IF instead of an electromagnet I was going for an inductor, how do you think the higher local flux density created by at the pointed tip would be more effective than a flat edge core?
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RE: Electromagnet core shape vs field strength/shape
So I was building an electromagnet to reach ~2T over a 2" diameter, so we start with iron core wound to reach 1T on 4" and taper it to reach near saturation, then add tapered Permandure pole pieces to reach 2" and higher field density. Local filed density is higher but NA is the same.
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Plymouth Tube
RE: Electromagnet core shape vs field strength/shape
The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.