Switchable Permanent magnets?

  • Thread starter Cbowen546
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  • #1
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Hey everyone,

I am wondering if there is a way to orient magnets so that the field is contained.

Little background, i am trying to develop a device that can lift small Fe particles. I determined that a rare earth magnet will do the trick but i need it to be switchable and small/lightweight. So i tried to build an electromagnet powered by 1 or 2 D-Cell batteries but cant seem to come up with anything strong enough.

I found these MagSwitch devices that are small, lightweight and are easy to operate (turn of a switch) and use NO POWER. This is interesting but i cant figure out how they do it. To use a few magnets and arrange them so that there is no field doesn't make sense to me...

Also found this link: http://www.thyssenkrupp-magnettechnik.com/pdf/stacking.pdf [Broken]

But am having a hard time working out the orientation of the "coil" in each diagram. Is the coil just one large coil wrapped around the center lug in types 1, 2 and 2b? Or is it two small coils oriented with poles vertically or horizontally?

ANY help is much appreciated!!!!

Thank you
Chris
 
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Answers and Replies

  • #2
Drakkith
Staff Emeritus
Science Advisor
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Interesting, I'll have to look into this some more.
 

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