Re: Homebrew HV trannie

To: tesla-at-pupman-dot-com
Subject: Re: Homebrew HV trannie
From: "chester lowrey" <lowrey-at-interpac-dot-net> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
Date: Thu, 17 Feb 2000 08:07:52 -0700
Approved: twftesla-at-uswest-dot-net
Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

At 04:44 PM 02/15/2000 -0700, you wrote:
>Original Poster: "Grayson B Dietrich" <electrofire-at-juno-dot-com> 
>
>Hello, All
>
>as long as the subject is up again, I'll ask this. Would the transformer
>cores from a large (250A) arc welder seem suitable for a rewind as HV
>transformers? I may be able to get my hands on a scrapped unit, with
>three very large such transformers in it. One has the variable core
>shunt, the other two don't have any mena of adjustment. But, there is a
>high/low current setting switch on it, so it may switch one or both of
>them in or out of circuit, I suppose.
>
>They seem rpime for a rewind, as the only thing holding on the "I"
>section of the E-I core are little strips of metal thinly welded on. A
>few minutes with an angle grinder will take care of it.
>
>I'm not sure what can wear out on an arc welder, but the people who have
>it tell me that it is unusable. Each core (E-I style) seems to have about
>a 16"^2 cross section. How many kVA could I push one too?
>
>Thanks,
>
>Grayson Dietrich
>http://www.electrophile.8m-dot-com
>
>_

i dont think the core of a arc welder will work at all beacuse i was going
to do the same thing as you but then thought about the size of the HV
windings and the insulation that goes along with them. i got a very large
broken 550 amp 45v dc arc welder from a local buisness that is going out of
buisness and gave it to me for free. the main power xfmr might have worked
for such a purpose except for the fact that it was GIGANTIC and would have
been imobile after winding. then i thought about how easy it would be to
just buy a pole pig from somewhere (i dont have one yet) and use the pole
pig to power your coil.

	Chester 
		Hawaii
chester