From: Paul
Date: Tue, 30 Apr 2002 20:45:47 +0100
Subject: Re: [TSSP] Secondary voltage stress factor
[breakdown]
John wrote:
> It may be helpful to make the secondary surface ribbed like an HV
> insulator. The winding would be normal,
Yeah. Maybe a secondary could be built from a stack of rings
alternating with insulated discs. Each ring say 50 turns
| |
| | ring
-------------------- disc
| |
| |
--------------------
| |
| |
Be nice if these could be mass produced, to stack arbitrarily,
so that you could build ad hoc cones, cylinders, etc. Easy to
expt then with different wire sizes, non-uniform wire, magnifiers,
etc. Just have a stock of lots of different diameter rings and
discs and just pile them up for a given experiment. Damaged bits
easily discarded. Coils easy to tap for measurements. Sort of a
coiler's Lego kit. Sort of thing the Geek group could turn out,
perhaps?
[racing arcs on inside]
John wrote:
> I've never heard of it happening.
> may be to use a clear lucite or plexiglas form, then spacewind
> the winding,
Yes, or maybe a mirror propped at an angle beneath the coil.
I suppose if that sort of breakdown is going to occur, it would
happen first on the outside, net of any defects on the inner
surface?
Well I don't think we can say much more without some base
current measurements from a racing arc coil. It would be very
nice to have an idea of what V/cm this starts at.
--
Paul Nicholson,
--
Maintainer Paul Nicholson, paul@abelian.demon.co.uk.