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Skin effect-skin depth-good conductors

  1. Oct 19, 2014 #1
    I am desperate with an assignment and i would be grateful if someone could answer the following question.
    I read about skin effect and skin depth and i found the following one.
    "The skin effect depends upon the nature of material used for the conductor diameter of the wire, frequency, shape
    of the wire. Skin depth varies as the inverse square root of the conductivity. This means that better conductors
    have a reduced skin depth."

    As i know ac frequences provokes skin depth . Higher frequecnies means smaller skin depth and high Rac Resistance and high losses . I cannot undestand why a ''good conductor'' has a reduced skin depth. I thought that good conductor means bigger skin depth, small resistance Rac and small losses.
     
  2. jcsd
  3. Oct 19, 2014 #2

    mfb

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    Staff: Mentor

    Qualitatively: A good conductor can have the same current in a smaller area.
    The higher conductivity value is more important than the reduced skin depth (just the square root of conductivity), so you still get a smaller resistance from better conductors.
     
  4. Oct 20, 2014 #3
    Thanks a lot for the reply. Last question. I am searching for methods to limit the skin effect in electrical conductors but I dont have electrical backround( I am a civil engineer) could you please tell me some methods to limit the skin effect?
     
  5. Oct 20, 2014 #4

    mfb

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    Staff: Mentor

    The wikipedia article discusses some approaches. In general, split the current over multiple wires or wire-like things. Get the return lines close together, if reasonable.
     
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