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Re: Calling Bart Anderson
Original poster: "Barton B. Anderson" <bartb@xxxxxxxxxxxxxxxx>
Hi Jim,
Wow! That's a BIG MMC! I think that large MMC's are fine from an
electrical view point. I'm not sure that price is however.
Professional pulse caps can be found from time to time for a great
price. New ones are spendy however.
I feel your ok with the voltage standoff rating. As long as you are
at least in the "fair" range, your ok according to the TCML's
experience with MMC's. "Fair" indicates the cap bank is rated between
1.5 to 2.0 times the transformer peak voltage. That's decent for
MMC's and most MMC's are built in this range. Some have managed long
life with no derating (the cap bank voltage equal to Vp). Note that
Javammc gives a "questionable" rating here. I know the talk about
MMC's current and temp data, but I still feel it's worth the extra
money to at least give some derating to the caps regarding voltage
which is why I give both a voltage and temperature rating in Javammc.
I realize that with a large cap bank, the extra money can be quite a
bit. For the average MMC, it's reasonable.
I don't want the program (Javammc) to error on the side of failure,
but to error on the side of success.
I've been thinking that maybe the derating "values" would be more
helpful than "words" (i.e., "fair", "good", etc.). The reason I kept
the word format is for new experimenters who may not be as familiar
with capacitor derating during protocols.
What do you think, would numbers mean more than words to you? (they do to me).
Take care,
Bart
Tesla list wrote:
Original poster: "Jim Mora" <jmora@xxxxxxxxxxx>
Hi Bart, et al,
Was my additive inductance leads, turns, etc, ever a concern
considered in JAVAMMC ? Darn, I will have 398 CD's .15uf 22 per
string and the program still rates the standoff to "fair". That's a
$1000 bucks. At least 18 strings comes out to "excellent" temperature rise.
What's you opinion on bigger coils. Are MMC's still practical?
Thanks for you outstanding Java Magic!
Jim Mora