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Is it possible to balance a electromagnet assembly and float it on a huge permanent magnet?

Is it possible to balance a electromagnet assembly and float it on a huge permanent magnet? - Physics Forum

Is it possible to balance a electromagnet assembly and float it on a huge permanent magnet? - Physics Forum. Discuss and ask physics questions, kinematics and other physics problems.


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  #1  
Old 01-26-2005, 01:31 AM
Fat Cat
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Default Is it possible to balance a electromagnet assembly and float it on a huge permanent magnet?



I am contemplating an idea of controlling an electromagnet assembly
on a permanent. I once saw a toy consists of a permanent magnet
platform and an toy aircraft raised 15cm on the top. The aircraft was
magnets also, but it was constrained by some threads and thus, it
won't move..

My assembly will consist of the same aircraft with three electromagnets
strategetically mounted on, the currents are independently controlled by
the most powerful microprocessor that I can find, in fact I can design large
scale digital circuits in an FPGA if there is much DSP involved.

Is this idea realistic?

Thanks.



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  #2  
Old 01-26-2005, 01:41 AM
ošin
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Default Is it possible to balance a electromagnet assembly and float it on a huge permanent magnet?

>I am contemplating an idea of controlling an electromagnet assembly

Yes.


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  #3  
Old 01-26-2005, 02:01 AM
Fat Cat
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Default Is it possible to balance a electromagnet assembly and float it on a huge permanent magnet?

How do I sense the movement of the assembly in order to
compensate that variation by changing the current?

Thanks











"ošin" <oš[Only registered users see links. ]> wrote in message
news:[Only registered users see links. ]...


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  #4  
Old 01-26-2005, 02:04 AM
ošin
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Default Is it possible to balance a electromagnet assembly and float it on a huge permanent magnet?

> How do I sense the movement of the assembly in order to

Use a transducer.


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  #5  
Old 01-26-2005, 03:06 AM
Gordon
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Default Is it possible to balance a electromagnet assembly and float it on a huge permanent magnet?

On Wed, 26 Jan 2005 09:31:17 +0800, "Fat Cat"
<[Only registered users see links. ]> wrote:

Study the principles of MAGLEV train systems. They use
electromagnets, but a model like you suggest could be made with
one permanent magnet and one electromagnet. The problem would be
in controlling the elevated magnet and keeping it from doing a
180 degree flip, then crashing into the other magnet.

I've been trying to figure out a means for setting up a moving
magnetic field between two very strong magnets, either electro or
permanent, such that the magnets with their resultant field could
be moved along a linear horizontal path for a few meters, then
somehow recirculated to the starting point, and the process
continued indefinitely. Does anyone have any suggestions?

Gordon
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  #6  
Old 01-26-2005, 03:15 AM
N:dlzc D:aol T:com \(dlzc\)
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Default Is it possible to balance a electromagnet assembly and float it on a huge permanent magnet?

Dear Fat Cat:

"Fat Cat" <[Only registered users see links. ]> wrote in message
news:[Only registered users see links. ].sg...

My son has a "levitating globe" done on just such a principle. I think
they are cheap enough you could reverse engineer one...

David A. Smith


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  #7  
Old 01-26-2005, 06:29 AM
Fat Cat
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Default Is it possible to balance a electromagnet assembly and float it on a huge permanent magnet?

Thank you all for your replies.
Since this has already been done, then I don't want to pursue it any longer.

Thanks.




"N:dlzc D:aol T:com (dlzc)" <N: dlzc1 D:cox T:[Only registered users see links. ]> wrote in
message news:RWDJd.4696$av.2445@fed1read01...


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