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Date: Tue, 21 Jan 2003 19:02:52 -0500
From: Dan Barlow
User-Agent: Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.1) Gecko/20020826
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Subject: Re: Electromagnet Design Resources Needed
References: <email@example.com> <8W6X9.1603$3P1.firstname.lastname@example.org>
Organization: Heller Information Services
> This is P!erCer, I just moved off google because it is so #&$^#& slow.
> I got Maxwell SV, and it models magnetic fields very well (despite the many
> crashing bugs). However, from what I am seeing, you can't really improve
> much upon the simple cylinder wrapped in wire. I tried some really weird
> designs, but they all turn out to have similar extension beyond the device.
> No wonder there wasn't much on the internet about the shape. It doesn't
> matter much at all.
There is apparently an arrangement of multiple magnets which will bias
the resulting total field farther off to one side of the array. I
remember this being discussed in connection with maglev trains, but I
can't find the Web page at the moment. It looked something like this:
[ N ][ ][ S ][ ][ N ]
[ ][N S][ ][S N][ ]
[ S ][ ][ N ][ ][ S ]
but with a specific order and pattern of reversals. The flux graph
showed a stronger flux on one side than the other. I'm not sure how
you would adapt this to a 2D array, but it's something to think about.
Maybe you'd have multiple rods with short connecting pieces or
something. Sorry I can't find the direct URL. :(
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