Re: NST in oil design to help prevent NST failures

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

Original poster: "Scott Hanson by way of Terry Fritz <teslalist-at-qwest-dot-net>" <huil888-at-surfside-dot-net>

D.C. -

Where is the major expense in your ballast and transformer cores: the
lamination material itself or in the laser cutting? Have you been having the
lamination supplier perform the laser cutting using his own in-house laser?
At the moment, there are dozens of laser-cutting and water-jet houses on the
west coast who are a little low on work and would be happy to quote this
job.
Have you priced water-jet cutting vs laser cutting? What lamination
thickness do you use?

Regards,
Scott Hanson

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Saturday, June 14, 2003 7:43 PM
Subject: Re: NST in oil design to help prevent NST failures


 > Original poster: "Dr. Resonance by way of Terry Fritz
<teslalist-at-qwest-dot-net>" <resonance-at-jvlnet-dot-com>
 >
 >
 > Actually they are.  No one wants to stop their normal mfgring to make a
 > small run.  90% of all companies we have talked to just find this "not
cost
 > effective" and will not consider doing it.
 >
 > In theory it sounds easy, but in practice, it isn't.
 >
 > Dr. Resonance
 >
 > Resonance Research Corporation
 > E11870 Shadylane Rd.
 > Baraboo   WI   53913
 > ----- Original Message -----
 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > To: <tesla-at-pupman-dot-com>
 > Sent: Saturday, June 14, 2003 4:30 PM
 > Subject: Re: NST in oil design to help prevent NST failures
 >
 >
 >  > Original poster: "Crow Leader by way of Terry Fritz
<teslalist-at-qwest-dot-net>"
 > <tesla-at-lists.symmetric-dot-net>
 >  >
 >  > Sent: Saturday, June 14, 2003 11:47 AM
 >  > Subject: NST in oil design to help prevent NST failures
 >  >
 >  >
 >  >  > Original poster: "Dr. Resonance by way of Terry Fritz
 >  > <teslalist-at-qwest-dot-net>" <resonance-at-jvlnet-dot-com>
 >  >
 >  > [cut]
 >  >
 >  >  > I'm trying to optimize the design to keep the costs affordable for
 > members
 >  >  > of this list.  Will keep you posted.  The bobbins and the windings
 > aren't
 >  >  > the problem --- it's optimizing laminated core costs to make it all
 > work
 >  >  > out.
 >  >
 >  > What is the problem you are having? While standard EI laminations
probably
 >  > lack the creepage you want for a several kVA transformer, there are
choke
 >  > cores in that approximate size, maybe even having legs sawed off a
three
 >  > phase core might work, since they have more space for the core. I can
 >  > imagine custom stampings would be a hassle and costly in a small run.
 >  >
 >  > KEN
 >  >
 >