Re: photocopier transformers (its a simple typo thats causing the confusion)

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

Original poster: "Jim Lux by way of Terry Fritz <twftesla-at-qwest-dot-net>" <jimlux-at-earthlink-dot-net>

Folks...

There are two kinds of HV used in photocopiers.  There is a high voltage,
low current supply, DC, used for charging the photoconductive drum that
picks up the toner and puts it on the paper. 5-10 kV at a few mA would be
typical.  It is really used to generate corona discharge off a bunch of fine
wires or points.

There are also HV transformers used to run the very bright light that shines
on the original. The light bulb (as it were) is a gas discharge lamp which
needs a "constant current" type ballasted supply. It works like a BIG,
BRIGHT neon sign, probably using xenon or mercury vapor (I'd be interested
in knowing...).  These are the 4500 V, 400 mA units from H&R and C&H, for
instance

Finally, there are also HV supplies used to charge the reservoir caps to
fire the flash tubes in copiers that use flash tubes.

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Wednesday, December 19, 2001 4:00 PM
Subject: Re: photocopier transformers (its a simple typo thats causing the
confusion)


> Original poster: "Tom Stathes by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<newphreak_16-at-yahoo-dot-com>
>
> The HV generator in a photocopier is similar to a
> flyback (with diode) but smaller, they rate at 5kvDC
> 300 MICRO-amps (ua), not milli-amps (ma)
> --Tom
>
>
>
> --- Tesla list <tesla-at-pupman-dot-com> wrote:
> > Original poster: "by way of Terry Fritz
> > <twftesla-at-qwest-dot-net>" <Hollmike-at-aol-dot-com>
> >
> > I have seen one in a catalog that was 5kV and 300ma
> > Mike
> >
> >
> >
> > >
> > > Someone once told me....photocopier transformers
> > are similar to MOT's but
> > > output around 5 kV at several hundred mA's. I not
> > sure if that
> > > correct?......I can't imagine photocopiers needing
> > a huge power supply like
> > > that!
> > >
> > > Anybody know???
> > >
> > >
> > >
> >
> >
> >
> >
> >
> >
>
>
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