Wheeler's air core coil formula

Discussion in 'Feedback and Suggestions' started by webbie, Jul 22, 2010.

  1. webbie

    Thread Starter New Member

    Jul 21, 2010
    2
    0
    Hi - I hope I'm not speaking out of turn here. I'm new to this community and was just browsing the site. I noted that in the inductor sizing equations here: http://www.allaboutcircuits.com/vol_5/chpt_1/6.html

    you state that "Wheeler's spiral formula is 1% accurate for c>0.2" but make no reference to c. From here:
    http://microblog.routed.net/wp-content/uploads/2008/10/pancakewheel.pdf
    and here:
    http://info.ee.surrey.ac.uk/Workshop/advice/coils/air_coils.html

    c refers to the winding thickness of a multi layer coil. Should your reference be updated?

    Steve.

    P.S. I know this is nit picking, but useful is spelled with one 'l'...
     
  2. retched

    AAC Fanatic!

    Dec 5, 2009
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  3. The Electrician

    AAC Fanatic!

    Oct 9, 2007
    2,281
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    Even more to the point is the fact that the eBook says:

    "Wheeler's formulas for inductance of air core coils which follow..."

    but they don't give Wheeler's formulas at all.
     
  4. Dcrunkilton

    E-book Co-ordinator

    Jul 31, 2004
    416
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