Using an electromagnet to disengade a permanant magnet?
Using an electromagnet to disengade a permanant magnet?
(OP)
First post here, I am hoping some kind soul will be able to help me with solving a problem that I have.
I am a structural engineer specialising in structural glass. I am setting out to test some glass samples for impacts and for this I am required to drop a steel ball of approx 1kg from a height of 4m.
I am proposing to use an electromegnet for the release mechanism, but there are some obvious dangers that I need to take precaution against.
What I am considering, is to use a permanent magnet to support the steel ball, and than have an electromegnet to disrupt the magnetic field, causing the ball to drop. This ensures that if there is a power failure, the ball will remain safe.
Seems like a nice idea, but I am not knowledgable enough to know for sure that it is possible. Any help would be greatly appreciated.
I have attached a sketch to show the arrangement I am proposing, and links to what I believe will be suitable parts.
Ring magnets.
http ://e-magne tsuk.com/m agnet_prod ucts/neody mium_magne ts/ring_ma gnets.aspx
Electromagnet.
h ttp://www. ebay.com/i tm/12V-DC- 3W-Electri c-Lifting- Magnet-Hol ding-Elect romagnet-L ift-2-5Kg- Solenoid-/ 1905867175 98?pt=LH_D efaultDoma in_0&h ash=item2c 5fda859e&a mp;afsrc=1
I am a structural engineer specialising in structural glass. I am setting out to test some glass samples for impacts and for this I am required to drop a steel ball of approx 1kg from a height of 4m.
I am proposing to use an electromegnet for the release mechanism, but there are some obvious dangers that I need to take precaution against.
What I am considering, is to use a permanent magnet to support the steel ball, and than have an electromegnet to disrupt the magnetic field, causing the ball to drop. This ensures that if there is a power failure, the ball will remain safe.
Seems like a nice idea, but I am not knowledgable enough to know for sure that it is possible. Any help would be greatly appreciated.
I have attached a sketch to show the arrangement I am proposing, and links to what I believe will be suitable parts.
Ring magnets.
http
Electromagnet.
h





RE: Using an electromagnet to disengade a permanant magnet?
Mike
RE: Using an electromagnet to disengade a permanant magnet?
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RE: Using an electromagnet to disengade a permanant magnet?
Steel pole pieces that run down each side of the magnet and are about 2/3 of the ball diameter apart.
You don't want a real strong magnet, just to hold the ball firm.
A ferrite magnet should be fine.
Coils wrapped around the two pole pieces and wired so that the field that they produce opposes the PM.
A simple pulse should cause release.
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