Re: ballast questions

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "steve" <steve_vance-at-cablelynx-dot-com> 

Anyone????


----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Tuesday, July 06, 2004 5:46 PM
Subject: ballast questions


 > Original poster: "steve" <steve_vance-at-cablelynx-dot-com>
 >
 > Hi List,
 >
 >   I have a few questions about making a pig ballast. My 225A welder bit
the
 > dust the other day. I was thinking about using the core to make choke
 > ballast. The core is not a standard E I . It is more like an E and a
 > sideways E and an I. The sideways E is at 90deg of the Reg. E. It had a
 > small winding that had the taps for the low current side of the welder
 > (75-110A) There are what appear to be shunts in between the largest E
 > section. ( the original pri. and sec.) 1. Would these need to be removed
 > before winding or can they be ignored?   2. I don't see any practical way
to
 > make an air gap in the core without cutting the top off. How important is
 > it? The core weighs around 80 lbs. I want to ballast the pig to around
20A.
 > With a core this size, would saturation be a problem?   3. Should I cut
off
 > the E section that is not going to be used? This probably accounts for 40%
 > of the weight.   4. And finally, I know the formula for calculating a
single
 > layer coil but I'm not sure how to go about calculating a multi layer
coil.
 >
 >
 > Thanks in advance for any help,
 > Steve Vance
 >
 >