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Iron powder and epoxy?

  1. Nov 13, 2009 #1
    Any have good results by mixing iron powder and epoxy, purpose is to create an armature for a generator.
  2. jcsd
  3. Nov 13, 2009 #2
    I think you want high permeability of the magnetic circuit including both armature and stator. Typical permeability (I think) of iron powder and epoxy is ~ 100 or 150, while steel laminations are ~ 4000. In rotating machinery, one of the limitations is the low permeability of the gap (=1) between armature and stator.
    Bob S
  4. Nov 13, 2009 #3
    Thanks for your answer.

    Steel Laminations ?
    What is that ?
  5. Nov 13, 2009 #4
    Most generator and alternator armatures (except permanent magnet rotors on brushless dynamos) have steel laminations ~ 0.4 mm thick in the armature to reduce ac eddy currents in the steel.
    Bob S
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