Re: My First PIG and it's operation

To: tesla-at-pupman-dot-com
Subject: Re: My First PIG and it's operation
From: "Malcolm Watts" <MALCOLM-at-directorate.wnp.ac.nz> (by way of Terry Fritz <terryf-at-verinet-dot-com>)
Date: Tue, 06 Oct 1998 08:01:06 -0600
Approved: terryf-at-verinet-dot-com

Hi Dwight,
            To answer one of your questions:

> Original Poster: dwight duncan <duncand-at-ccsalpha2.nrl.navy.mil> 
> 
> 
> Hi All,
<snip>
>     If anyone could answer these questions I would be very grateful.
> 1) Why only 10 mH with 130 turns on a 40 amp variac gapped core?

Gapping a core will drop the induction factor (permeability of the 
core) enormously. Most of the flux in a gapped core ends up in the 
airgap and not the iron. The rationale for gapping in the first place 
is to reduce core flux for a given applied magnetizing force. It also 
turns the inductor into an efficient energy store. Ungapped cores 
store little energy which is what you want in an ideal transformer.

Malcolm
<snip>