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Re: ero cap question
In a message dated 10/8/00 2:46:02 PM Pacific Daylight Time, tesla-at-pupman-dot-com
> Original poster: "Metlicka Marc" <mystuffs-at-orwell-dot-net>
> the funny thing about the string i tried was that even at very close gap
> spacing, the charge only smoothed out slightly? the string was 20nf at
> 11kv, i would think a 12\30 nst would have charged this string quite
> well since it will charge my 99kv 15nf bucket cap up with no problem? of
> coarse when i added my second bucket cap, the 12\30 had a hard time
> charging them, i added a second 12\30 for a total of 60ma, this stopped
> the rat-tat-tat of the poly's but they may have been stressed in there 6
> years of motor controller use because some failed in short order.
> a very strange occurrence indeed?
Well, maybe the 20nF is getting a little large for a 12/30, esp when
using a static gap. The limit for LTR cap values is a little less when
using static gaps because one does not benefit from downside
charging as would occur in a sync gap system. Somewhere around
16nF may be the limit for static gaps with a 12/30, and this will
depend somewhat on the particular brand of NST, etc. I think
you can go to about 2.5 times the resonant size for LTR values,
using static gaps. This would be 6nF x 2.5 = 15nF.