Re: 500 KV DC (fwd)

[<sroys@xxxxxxxxxxxxxxxxx>]

---------- Forwarded message ----------
Date: Wed, 22 Sep 2004 08:10:07 -0600 (MDT)
From: Chip Atkinson <chip@xxxxxxxxxx>
To: High Voltage list <hvlist@xxxxxxxxxx>
Subject: Re: 500 KV  DC (fwd)

Hi Colin.

I am but the list owner, much like an e-landlord.  I own and maintain the
hardware and network connections.  Ok, I am the one who complains to the
phone company when *their* network connections are spotty. :-)

Steven Roys is the list moderator.  He and all the subscribers on the
list, including you, are the ones who put in the time and effort to make
the list what it is.

Here's what I know about what you are asking.  When you said "DC to
500KV", you probably meant 0-500kV, right?  DC is direct current, and
500kV is 500,000 volts, an entirely different unit of measurement.  Like
gallons to inches.

But anyway, I'd leave the iron core in there, use the transformer as it
was designed, and use a voltage doubling circuit.  It uses diodes and
capacitors to double the voltage and I assume, halve the current.
Others on the list should be able to help you with a schematic. I found
one quickly on google: http://www.tpub.com/neets/book7/27m.htm.

Chip

[Xray transformers generally put out DC for the Xray tube, so I imagine
you'd have to slop around and put a doubler in the circuit before the
rectifier and filter. SRR]

On Wed, 22 Sep 2004, High Voltage list wrote:

> Original poster: <sroys@xxxxxxxxxxxxxxxxx>
> 
> 
> 
> ---------- Forwarded message ----------
> Date: Wed, 22 Sep 2004 09:26:34 -0400
> From: Colin Quinney <crquin@xxxxxxxxxx>
> To: High Voltage list <hvlist@xxxxxxxxxx>
> Subject: 500 KV  DC
> 
> Hi Chip !
> 
> I have on hand an old 250 KV  60 Hz  X-ray transformer. It was manufactured 
> with three windings connected in series and it  was designed to be run in 
> dielectric oil. I can remove the iron laminate core if necessary to run it 
> at higher frequency, but maximum output power is not a critical factor for 
> what I require,  and that is variable DC to 500 KV. Filtering not required.
> 
> I'm looking for ideas for best method of doubling to 500 KV while 
> minimizing complex solid state design. I have a 1 KV Variac, dozens of 20 
> KV diodes, enough for a full wave bridge if necessary. High power output is 
> not required.
> 
> Safety is top priority. Wire netting for Faraday cage has been purchased.
> 
> Suggestions welcomed  :-)
> 
> 
> Best Regards,
> Colin Quinney
> 
> 
> 
> 
> 
> 
>   9/22/2004, you wrote:
> >Original poster: <sroys@xxxxxxxxxxxxxxxxx>
> >
> >This is a test to see if the list is working properly.  If you get this,
> >please reply to the list.
> >
> >Thank you.
> >
> >Chip Atkinson
> >
> >---------- Forwarded message ----------
> >Date: Tue, 21 Sep 2004 13:33:40 -0600 (MDT)
> >From: Chip Atkinson <chip@xxxxxxxxxx>
> >To: hvlist@xxxxxxxxxx
> >Subject: Test from chip
> >
> >Hi
> 
>