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Energy in a magnet

  1. Apr 28, 2008 #1
    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
     
  2. jcsd
  3. Apr 28, 2008 #2

    Dale

    Staff: Mentor

    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).
     
    Last edited by a moderator: Apr 23, 2017 at 12:32 PM
  4. Apr 28, 2008 #3
    good, thanks, but how can I use FEMM software for have energy in the magnet ?
     
  5. Apr 28, 2008 #4

    Dale

    Staff: Mentor

    I have no idea. I don't even know what FEMM software is.
     
  6. Apr 28, 2008 #5
    does anybody can help me ?
     
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