Re: MOT charging reactor PS

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

Original poster: "Bert Hickman by way of Terry Fritz <twftesla-at-qwest-dot-net>" <bert.hickman-at-aquila-dot-net>

Steve and Wells,

Great ideas! Wells, your approach should work quite well for an inductor
made from two secondaries as long as the inner-most end of each winding
was connected to the core, the windings were phased so that the fluxes
added, and the entire core was "floated" above ground with standoff
insulators. 

Another option (better) would be to take the secondary windings off
transformers having a larger core area, and then mount these onto
smaller sized cores. The space between the larger secondary windings and
the smaller core could then be supplemented with layers of Mylar or
polyethylene sheet material to increase the degree of HV insulation
between the windings and the core. This should then allow you to safely
stack more than two secondaries in series. Adding small air gaps in the
magnetic path then completes the setup! If the individual windings are
already impregnated, oil immersion may not even be necessary. 

Best regards,

-- Bert -- 

Tesla list wrote:
> 
> Original poster: "S & J Young by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<youngs-at-konnections-dot-net>
> 
> Wells,
> 
> Great idea to use two matched E cores, each with a secondary, to make a good
> gapped reactor!    But I would worry about loading more secondaries on each
> E section, because the insulation between the inside of a secondary and the
> core is lousy since the inside winding is typically connected to the core
> anyway.  So with two or more in series, you will have several thousand volts
> between core and the inside of one of the windings.  This might lead to
> breakdown and failure.  There isn't room to add insulation between the core
> and the inside of the winding.
> --Steve
> 
> ----- Original Message -----
> From: "Tesla list" <tesla-at-pupman-dot-com>
> To: <tesla-at-pupman-dot-com>
> Sent: Monday, December 17, 2001 11:19 AM
> Subject: MOT charging reactor PS
> 
> > Original poster: "Wells Campbell by way of Terry Fritz
> <twftesla-at-qwest-dot-net>" <wellscampbell-at-onebox-dot-com>
> >
> > Greg, Steve, all,
> ><SNIP>
> > As for the reactor, I havent gotten that far yet, but I had an idea that
> > might be of use, especially in light of steve's last mail: I was thinking
> > of taking two MOT's of matching geometries, cutting the welds, and using
> > the  two E sections, facing each other, and with a gap, and loading on
> > two, three, or maybe four secondaries in series:
> >
> > ---------------
> > ---------------
> > |||   |||   |||
> > |||   |||   |||
> > |||   |||   |||
> >
> > |||   |||   |||
> > |||   |||   |||
> > |||   |||   |||
> > ---------------
> > ---------------
> >
> >
> >
> >  At least three  MOT secondaries  would fit in such an arrangement, maybe
> > four. I took apart a little one the other day, and it was fairly easy.
> > in fact, my biggest problem was that the E section basically fell apart
> > into sheets, I need to be careful dremelling the welds off and leave
> > the bead on the E side. The secondaries could be insulated with extra
> > material, and the gap adjustable, maybe. Just a thought at present.
> >
> > Wells Campbell
> > wellscampbell-at-onebox-dot-com - email
> > (415) 430-2169 x3756 - voicemail/fax
> >

-- 
Bert Hickman
Stoneridge Engineering
Email:    bert.hickman-at-aquila-dot-net
Web Site: http://www.teslamania-dot-com