Energy in a magnet

  • Thread starter lba7
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  • #1
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Hello,

(I'm not fluently in english, sorry if it's not a pure english)

I use FEMM software for caculate energy. I have found an integral fonction "Magnetic field Energy" when I select a surface. But I have always the same energy, I don't know why. Is there necessary to make something special ?

In fact, I would like to calculate the energy when a magnet draw a solid metal, or when a magnet draw another magnet. It's a simple problem.

The potential energy move between a solo magnet or a magnet with metal, no ?


Somebody can help me ?

Thanks

Ludovic
 

Answers and Replies

  • #2
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When a magnet pulls a ferromagnetic metal it actually realigns the magnetic domains in the metal so that they form a magnet. That said, there is a specific http://hyperphysics.phy-astr.gsu.edu/hbase/electric/engfie.html" [Broken]. When two fields overlap they will superimpose to either make the field stronger (increasing the energy and requiring work) or weaker (reducing the energy and doing work).
 
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  • #3
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good, thanks, but how can I use FEMM software for have energy in the magnet ?
 
  • #4
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I have no idea. I don't even know what FEMM software is.
 
  • #5
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does anybody can help me ?
 

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