Re: High Power SRSGs

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Gerry  Reynolds" <gerryreynolds@xxxxxxxxxxxxx>

Hi DC,

This makes sense as I'm using 1/8 tungsten for this rotary.  The next 
one I'm starting on will use 3/8 tungsten for the flying electrodes 
and maybe 1/2 inch for the stationary ones.  The power level using a 
5KVA PIG will hopfully be between 5 and 8KVA.   The rotor will 
probably be 15 inches diameter with electrodes on a 13.5 inch 
diameter circle and will also be synchronous at 1800rpm.   I'm still 
debating on whether to use two or four stationary electodes.  Im 
thinking that with four, the gap effectively closes and separates at 
twice the speed and I'm wondering if this helps things more than the 
extra losses thru four gaps.

Gerry R.

> Original poster: "D.C. Cox" <resonance@xxxxxxxxxx>
>
> Try using 1/2 inch dia. fixed electrodes and you won't get power 
> arcing which results from insufficient cooling at the electrode 
> surfaces --- red hot electrode ends promote power arc formation.  I 
> run just two sparkgaps not four with all NST configurations at or 
> below 120 mA.  At 180-200 mA we go to 4 stationary electrodes.
>
> Dr. Resonance
>
>
>
>
> > Original poster: "Gerry  Reynolds" <gerryreynolds@xxxxxxxxxxxxx>
> >
> > Hi All,
> >
> > The SRSG I built for my NST farm (15KV 120ma) has two static and 4 
> > flying electrodes and arcs thru two gaps.  The 8 inch diameter disc 
> > runs at 1800rpm (120pps) and the four flying electrodes are all 
> > electrically connected together and rotate on a 6.5 inch diameter 
> > circle .  I have noticed that at the 2KW level, I might be seeing 
> > the beginnings of power arcing.
> >
> > Question:  for higher power levels it is certainly beneficial to go 
> > to a larger disc, but is it also beneficial to have four stationary 
> > electrodes and arc thru 4 gaps??
> >
> > Gerry R.