Re: Need help - winding an inductor

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Original poster: "rheidlebaugh by way of Terry Fritz <twftesla-at-qwest-dot-net>" <rheidlebaugh-at-zialink-dot-com>

Steve: the large value of the coil you want and the high voltage limits
construction. If you wind a series of thin stacked bobens you can get what
you want, This method is used in ignition coil type construction. You can
make the bobins of plexeglass with a hole saw and plex pipe or rod sections
glued together.Like your wifes sewing machine bobins.
   Robert  H

> From: "Tesla list" <tesla-at-pupman-dot-com>
> Date: Sun, 10 Mar 2002 06:12:03 -0700
> To: tesla-at-pupman-dot-com
> Subject: Need help - winding an inductor
> Resent-From: tesla-at-pupman-dot-com
> Resent-Date: Sun, 10 Mar 2002 06:32:47 -0700
> 
> Original poster: "S & J Young by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <youngs-at-konnections-dot-net>
> 
> Coilers,
> 
> Please give me some ideas for winding an air core inductor of about 0.2
> Henry.  This will be used for an experimental charging reactor for a TC.
> Specifications are as follows:
> 
> 1) Multi-layer air core solenoid wound with #26 wire
> 2) Needs to withstand a peak voltage gradient across the coil of 10 KV
> 3) Would like coil length, inside diameter & number of layers to give the
> most inductance per length of wire.  In other words, I would like to
> minimize the wire needed to achieve 200 milliHenry.
> 4) Must be something easy to wind and as small as practical.  (Please don't
> suggest a large TC secondary!)
> 
> Does someone have a formula for calculating the inductance of multilayer
> solenoid inductors?  I am thinking the end product will be something like a
> woofer speaker cross-over air core inductor, for which there should be
> design information available.
> 
> As a sanity check, I measured a partial spool of #26 enameled wire.
> Solenoid measures 9.1 cm long by 8.9 cm dia by 1.2 cm winding thickness.
> This has an inductance of 1.35 Henry and weighs about 4.3 pounds including
> the plastic reel.
> 
> Thanks for any help you can give,
> --Steve
> 
> 
> 
> 
>