litz wire winding

Discussion in 'The Projects Forum' started by vikramb, Mar 2, 2008.

  1. vikramb

    Thread Starter New Member

    Feb 13, 2008
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    Can you please
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
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    Do you really mean to use litz wire? Woven insulation? Magnet wire with an enamel insulation is more the thing.

    Here is a link to the way it's done - http://www.cappels.org/dproj/Toroid_winding/Toroid_Winding.html.

    Since your application is unknown, as is the frequency and desired inductance/turns ratio, that's about all I can provide. The ARRL site has lots of info on such stuff.
     
  3. jpanhalt

    AAC Fanatic!

    Jan 18, 2008
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    One thing to add in winding the toroid, make yourself a bobbin or shuttle to wind the wire on first that you can then pass through the toriod core easily. Don't try to do it by just pulling the wire through, unless you are making only a very few turns. A narrow strip of circuit board makes a nice shuttle. John
     
  4. SgtWookie

    Expert

    Jul 17, 2007
    22,182
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    There are quite a few different materials used for toroids; they have different permeabilities and are used for different frequency ranges. The material used is generally (but not always) indicated by coloring the toroid's coating.

    I downloaded a "cheat sheet" from Amidon last year which was a fortuitous move; it no longer appears on their website.

    There are formulas on this "cheat sheet" for number of turns vs inductance depending upon the material and size of the core.

    I have attached it as a .ZIP file; it is a web page in .mht format. You should be able to un-zip the file and then view it with your Web browser.
     
  5. bjrodriguez

    New Member

    Nov 19, 2008
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    Thanks for the information. It'll be a big help with my hydrogen project.

    J.R.
     
  6. jpanhalt

    AAC Fanatic!

    Jan 18, 2008
    5,699
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    How so?

    John
     
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