Re: gEDA-user: HV power supply help wanted

[John Doty <jpd@xxxxxxxxxxxxx>]

On Jul 9, 2008, at 10:02 PM, David Griffith wrote:

>
> I need some help with a high-voltage power supply.  It must provide  
> 1200
> volts from two D cells.  The general design is an oscillator chops  
> up the
> DC, feeds it to an audio transformer, and then on to a diode-capacitor
> ladder.  There also needs to be a point on the ladder that provides  
> 920
> volts.  I can't seem to get anywhere with Spice on figuring out the  
> right
> values.  Can someone point me to a tested schematic that meets my  
> needs?
> Or how about a resource on just how to go about designing this sort of
> power supply?

There's a pretty good analysis of this kind of circuit at:

www.blazelabs.com/CWdesign.pdf

>
> I have a schematic that will do 920V from a 9V battery, but it suffers
> from high drain if pushed to go to 1200.

Maybe you need another stage in your Cockroft-Walton ladder.

>   It uses a bog-standard XICON
> 42TM114-RC (15:1 with center taps).  The schematic is here:
> http://frotz.homeunix.org/images/hwps.png.
>
>
> -- 
> David Griffith
> dgriffi@xxxxxxxxxxxxx
>
>
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John Doty              Noqsi Aerospace, Ltd.
http://www.noqsi.com/
jpd@xxxxxxxxx




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