Magnet system
Magnet system
(OP)
Hello - I have attached a drawing of a simple system that I've been working on. I have a plastic base with a neodymium magnet recessed into the top. There are small ridges protruding from the top of the plastic base. A piece of thin steel will be attracted to the magnet and lay on top of the ridges. I was wondering if it is possible to install a small electromagnet on top of the neodymium magnet such that when the electromagnet is activated, it repulses the neodymium magnet and allows the steel plate to be removed. My thought is that the electromagnet can be strong enough to repulse the neodymium magnet, but weak enough to allow the steel plate to be removed with minimal energy.
Is something like this possible? Thanks very much. I appreciate the help.
Is something like this possible? Thanks very much. I appreciate the help.





RE: Magnet system
it would be easier to recess the magnet further and put a steel pole piece on it, then wind your turns around the pole piece.
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Plymouth Tube
RE: Magnet system
The distance between the top of the recessed magnet and the top of the ridges is small - around 1/8". Can I fit an electromagnet in that small of a space?
Do you know where I can find a micro-electromagnet on small of a scale? Or, is this something I would need to devise on my own?
Thanks again. I really appreciate the help.
RE: Magnet system
Fe
RE: Magnet system
An EM that small you cold build yourself. Some insulated copper wire will do the trick.
Fe
RE: Magnet system
An EM that small you could build yourself. Some insulated copper wire will do the trick.
Fe
RE: Magnet system
Fe
RE: Magnet system
TTFN
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RE: Magnet system
Fe
RE: Magnet system
You need to start from the basic requirement, and choose a magnet that does only what is absolutely necessary, and no more. Only then can you be somewhat confident on designing an EM to do its job.
It seems to me that you've pre-chosen a PM without specifically determining whether this neodynium magnet is gross overkill or not. Your one extra degree of freedom will be how much current you can run through the EM, and for how long you need it. Again, that comes from a thorough requirements analysis.
TTFN
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