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(December 19, 2006, 11:27:19 PM)
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Author Topic: winding a electromagnet  (Read 10670 times)

Offline terry1094

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  • Posts: 25
Re: winding a electromagnet
« Reply #15 on: December 25, 2007, 04:18:32 PM »
Tom Schum posted an interesting chart which shows the effect of various parameters on winding an EM:

http://mysite.verizon.net/vzesfls5/sitebuildercontent/sitebuilderfiles/coil_comparisons.pdf

Terry

Free Energy | searching for free energy and discussing free energy

Re: winding a electromagnet
« Reply #15 on: December 25, 2007, 04:18:32 PM »

Offline metalspider

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Re: winding a electromagnet
« Reply #16 on: December 25, 2007, 10:49:22 PM »
Honk,
 What do you think is the fastest rise time I can hope for?

Paul

P.S. Merry Christmas  :)

Offline metalspider

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Re: winding a electromagnet
« Reply #17 on: December 25, 2007, 10:53:30 PM »
Honk,
 What do you think is the fastest rise time I can hope for?

Paul

P.S. Merry Christmas  :)

Free Energy | searching for free energy and discussing free energy

Re: winding a electromagnet
« Reply #17 on: December 25, 2007, 10:53:30 PM »
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Offline Honk

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Re: winding a electromagnet
« Reply #18 on: December 25, 2007, 11:00:46 PM »
Merry Xmas.

That is a tough question.
It depends totaly on the final inductance of the solenoid.
I'm sorry, but I can't give you a straight answer on this question due to the many unknown variables.
But I believe you will have a hard time getting down to one 1ms. The Solenoid is just to big to have a low inductance.
You should really aim for a high current solenoid to reach your goal. This is your best shoot.

(I guess this electromagnet is going to be used in your fine E.M.I.L.I.E. Looking forward to see it)

Offline terry1094

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Re: winding a electromagnet
« Reply #19 on: December 26, 2007, 01:12:43 AM »
If we look at Tom's chart, we find that you can have thick wire, high current and relatively low voltage to result in a given EM field.  Alternatively, you and have a thin wire with lots of windings, high voltage, lower current and give the same relative field.

Since time is of the essence, it would be prudent to choose a very small wire with a very large breakdown voltage on the insulator (say teflon) and create many windings.   With a breakdown voltage of, say 2000 V, and a IGBT gate, one could achieve the required field with a small L/R ratio.

But, as Honk says, it requires a lot of trade-offs to optimize such a design.

Merry ?mass to all and to all a good nite!

Terry

Free Energy | searching for free energy and discussing free energy

Re: winding a electromagnet
« Reply #19 on: December 26, 2007, 01:12:43 AM »
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