Re: Inductance Calculations for iron core

to: Mike

We run 4" x 1 5/8" cores, Hypersil C silicon, 130 turns of #10 AWG for up to
12 kVA.



-----Original Message-----
From: Tesla List <tesla-at-pupman-dot-com>
To: tesla-at-pupman-dot-com <tesla-at-pupman-dot-com>
Date: Monday, July 12, 1999 4:53 PM
Subject: Inductance Calculations for iron core

>Original Poster: "Coiler" <mycroft-at-access1-dot-net>
>Looking for some help with figuring out how to build my own current
>inductor for my pig. Please don't tell me "you can do it
>I already know that (I currently use a Lincon 225A AC welder as my
>I'm just one of those "Build it yourself" type of guys :)
>What I am looking for is a guesstimate, or even the formulas to compute
>the inductance knowing the approximate cross section area. My plan is to
>a bunch of rebar tie wire I have here, cut to about 20" lengths, to fill
>a 2" PVC pipe. This would give me an open core with about a 1.6 square inch
>cross section.
>Estimated inductance per turn would be best, I'll probably use #10 THNN
>for about 6 TPI. (roughly 110 turns end to end)
>The OD of the PVC is actually 2.4" if that helps.
>(and if someone could refresh me on the formula for reactance, I wouldn't
>either :) )
>Michael Baumann
>Coiler, Homebrewer, Nerd. mycroft-at-access1-dot-net