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Inductance of excited coil?

Discussion in 'Electronic Design' started by Robin Marks, May 15, 2005.

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  1. Robin Marks

    Robin Marks Guest

    Is there any way to calculate the inductance of an AC excited coil?

    The specific setup involves a 20T bifilar wound 30mm diameter air core
    coil. One winding applies a low frequency square wave to stimulate
    emissions from a reagent placed within the coil. The second winding is
    capacitively tuned prior to a high gain amp. Hence the need to know
    the inductance.

    Thank you for your reply.

    Robin
     
  2. Reg Edwards

    Reg Edwards Guest

    To calculate coil inductance it is necessary to know length and
    diameter of the former and number of turns.

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  3. Robin Marks wrote...
    The common Wheeler equation should apply just fine, although you're
    expected to know the length of the coil. The bifilar winding will
    be very tightly coupled, so whatever is connected to it can strongly
    affect your tuned pickup coil (low-capacitance current-source drive
    should work well, without influencing the tuning). Also, the coils
    will have a high capacitive coupling, further complicating analysis.
     
  4. Reg Edwards

    Reg Edwards Guest

    The common Wheeler equation should apply just fine, although you're
    Indeed, to calculate the inductance, the coil length of a solenoidal
    winding coil is essential.

    The closeness of coupling between the primary and bifilar winding may
    be enough to render the bifilar winding unnecessary. I don't think
    the designer knows exactly what he is doing. Capacitance between the
    turns will disappear if one winding vanishes.
     
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