Re: SS Neon power transformer operation

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

Original poster: "Hofer Tobias by way of Terry Fritz <twftesla-at-qwest-dot-net>" <tobias.hofer-at-bluewin.ch>

hello
if you are interested in building a dc coil.
(i don't know what kind of...)
my current project a dc resonant power supply
for about 1200W.
http://trilo.minidns-dot-net/tesla/pspice/dc_coil/

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Monday, November 11, 2002 3:16 PM
Subject: Re: SS Neon power transformer operation


 > Original poster: "Allanh by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<allanh-at-starband-dot-net>
 >
 > It would make a good DC supply, but the recifiers would need to be the
"hot
 > carrier" type. Similar to those used in computer power supplies. They are
 > very common but not as cheap as say a 1N4007. The output could be
regulated,
 > but one would need to see a schematic first.
 >
 > allan
 >
 > ----- Original Message -----
 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > To: <tesla-at-pupman-dot-com>
 > Sent: Sunday, November 10, 2002 4:22 PM
 > Subject: Re: SS Neon power transformer operation
 >
 >
 >  >
 >  > Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
 > <dhmccauley-at-spacecatlighting-dot-com>
 >  >
 >  >  > Has anyone had experience with the 220V 50 Hz input, 15 kV, 20 kHz
20
 > mA
 >  >  > output solid state neon supplies being offered on eBay for $9.99
each?
 >  >  >
 >  >  > I know that they are not suitable for TC power work,
 >  >
 >  >  >>>>>>>>>>>> Actually, they would be good for DC powered tesla coils.
It
 >  > would be more easy to rectify DC voltage
 >  > from these as the ripple frequency would be much higher and the
peak-peak
 >  > ripple would be lower as well.  They won't work
 >  > for conventional coils though.
 >  >
 >  >  > I can easily rig an autotransformer to get 220 volts for the input.
I
 >  >  > suspect that these use a switching type driver that rectifies the
input
 >  > 110
 >  >  > Vac line input, and probably wouldn't care much if it was seeing 50
Hz
 > or
 >  >  > 60 Hz.  However, I thought I'd ask in case some had an experience
 > blowing
 >  >  > one up on 60 Hz power.
 >  >
 >  >  >>>>>>>>>>>Actually, you cannot use a variable transformer for these
type
 > of
 >  > power supplies.  Since these supplies are true
 >  > switching power supplies, the output voltage is controlled via voltage
and
 >  > current feedback.  Lowering or increasing the input voltage, the
 >  > power supply will still try to maintain a constant output voltage until
 > the
 >  > minimum / maximum input voltage threshold is passed which will
 >  > probably cause the supply to shutdown if it has internal protection.
 >  >
 >  >
 >  >
 >  >
 >  >  > Any experiences would be appreciated.
 >  >  > Thanks, Dave
 >  >  >
 >  >  >
 >
 >