Acylindrical magnets
Hey, so I've been wondering about magnets with more complex shapes than the standard cylinder. It seems to me that something like a torus would provide a significantly higher ratio of surface area to volume while also increasing the ability of the body to anchor the magnet. Barring the additional cost of manufacture, what are the specific drawbacks of something like this?
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Its be pretty easy to do with a drummel. You'd need the ability to coat it immediately though as the shot degrades from the moisture in air in no time. You could probably electroplate something on.
@Maxwell.. Gee, with a moniker of Maxwell I'm not sure I should get into a physics discussion. Take a look at this:
https://docs.google.com/viewer?url=patentimages.storage.googleapis.com/pdfs/US5929732.pdf
Badass eh? Point is to focus the field along a single axis as much as possible.
I think I get where you're going with the torus shape but I'm interpreting it as being the equivalent of a ring shaped magnet unless you're getting at an electromagnet. I mean all the cool toroidal field stuff is related to loops of wire carrying current no?
I'm not sure how to answer that question.. I guess whatever field shape that is able to produce sensation from the farthest distance with the minimal size of magnet? Perhaps a few different shapes would be best.. something giving a very broad field.. another giving a very small but intense field. I'm not sure.
If a Halbach Array is constructed by alternating magnet layout patterns, and only half of said magnets are physically pointing in a direction, we'll say "out". And the resulting design focuses all the magnetic fields from the magnets in one direction, "out". Then you have say 100 physical magnets, 50 of which point "out", 100 of which have fields focused "outward", 0 of which have reverse fields focused the other way.
This just started to make a little sense, if the magenta don't have a reversed field on the opposite side then this idea makes sense. Talking through things out loud (or while typing them) sometimes helps me realize things as I slow down and picture the scenario in my head.
Wouldn't the same affect be achieved by having 100 magnets all facing "out"? That is, isn't the benefit to a Halbach Array that there's no field on the "inside", rather than the "outside" field being stronger? I would think for the purposes of implanting it wouldn't be particularly beneficial to lack a reverse sided field on the back side of a magnet. I'm thinking specifically about sensing magnets in this case.