Re: panasonic mmc rating?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Daniel Barrett by way of Terry Fritz <twftesla-at-qwest-dot-net>" <dbarrett1-at-austin.rr-dot-com>

    Hi Laurence-

    When we talk about AC voltage ratings we are usually talking about RMS,
unless specified otherwise. Most equipment means RMS when it says '120VAC'
on the label. So your transformer's rating of 6500V *is* the RMS value.
    For your MMC design, it's the peak voltage you want to consider. Find
this by multiplying the RMS voltage by 1.414:
    6500 VAC (rms) = 9192 volts peak.
    Now you can add some safety margin to the 9192 volts and go from there.


    Vrms = Vpeak / sqrt(2)

    Vpeak = Vrms * sqrt(2)


db



----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Wednesday, September 25, 2002 9:16 AM
Subject: panasonic mmc rating?


> Original poster: "Laurence Davis by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <meknar-at-hotmail-dot-com>
>
> I'm building an mmc using panasonic caps from the same group as
> the ones spec'd in the terry filter.  the digikey p/n is p10513-nd.
> I'm building an mmc to replace the single pulse cap that I killed
> in my friends tabletop coil.  its using a 6500v/20ma open frame nst
> and the resonant cap is about 8nf.  the rms output is ....  okay
> my stupid math skills are haunting me...  is the rms output 6500 x 1.41
> or 6500 x 2 x 1.41 ?  the cap i designed is 2 strings of 9 0.033uf 1600v
> caps. giving a rating of 14.4kv at 7.5nf ( i think, the plans are in the
> other room. )
>
> the question:
> to calc rms output: 6500v x 1.41 = rms output?
> I'd like to overrate the mmc so I would get 6500 x 2 for the target
rating.
>
> also planning on making the mmc into a cube of sorts due to size
> constraints.  if cooling becomes an issue, I will place a small fan on one
> end of the cube.  the mmc cube will be like this: imagine two strings of
> caps folded length-wise 2 times.  2 wide by 3 high. about a 3" cube.
>
> larry
>
>
>