Re: MMC Capacitors from Dr. R.

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "S&JY" <youngsters@xxxxxxxxxxxxxxx>

Mike,

Good point.  I should have included the STK specs for the two caps.  They
are:

0.15 uF 2 KV   Ipeak = 144 amps, Irms = 8.9 amps
0.10 uF 3 KV  Ipeak = 144 amps, Irms = 8.1 amps

So they are roughly the same Irms.  Probably you will have more strings of
the 3 KV caps anyway to end up with the same capacitance of a 2 KV cap MMC.
You can find the complete specs for these caps at www.stkelectronics.com.
Look in the MP89 series specs.
--Steve Y.


----- Original Message -----
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Thursday, December 02, 2004 6:08 PM
Subject: Re: MMC Capacitors from Dr. R.


> Original poster: "Virtualgod" <mike.marcum@xxxxxxxxxxxx>
>
> True, but don't you have to consider the Irms rating as well? If the 3kv
> ones have a much lower Irms rating (not sure what it is, but the 2kv ones
> have like a 8A rating without getting too warm) then more strings would be
> needed. Plus you have to consider what voltage/ capacitance rating you are
> shooting for. I think there's a MMC calculator somewhere (I think it was
on
> the geek group site, can't remember) where you input calculated specs/cost
> of what you need and the individual cap's spec/cost and it gave you the
> cost of the array made from a given cap.
>
> Mike
> ----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
> To: <tesla@xxxxxxxxxx>
> Sent: Thursday, December 02, 2004 10:05 AM
> Subject: MMC Capacitors from Dr. R.
>
>
> >Original poster: "S&JY" <youngsters@xxxxxxxxxxxxxxx>
> >
> >
> >For those contemplating buying either the 0.1uF 3KV or 0.15uF 2KV caps
from
> >RRC, here is some food for thought.
> >
> >At rated max volts, which caps will give you more bang for the buck?
Let's
> >do the calculations:  Joules = 0.5*C*V*V.  The 2 KV cap will store 0.45
> >Joule, and the 3 KV cap
> >will store 0.3 Joule.  Ya gotta love the V^2 factor!
> >
> >Clearly for the same cost, the 3 KV caps are a much
> >better bargain.  Saying it another way, your MMC will cost significantly
> >less if made with the 3 KV caps.
> >
> >--Steve Y.
> >
> >----- Original Message -----
> >From: "Tesla list" <tesla@xxxxxxxxxx>
> >To: <tesla@xxxxxxxxxx>
> >Sent: Wednesday, December 01, 2004 7:53 AM
> >Subject: Re: Capacitors
> >
> >
> > > Original poster: "Dr. Resonance" <resonance@xxxxxxxxxx>
> > >
> > >
> > > We stock STK caps in 0.15 uF at 2 kV and 0.1 uF at 3 kV.  We also
> > stock > CD
> > > caps in 0.15 2 kV.
> > >
> > > Two in parallel with give you 0.3 at 2 kV or you can use three 0.1 uF
> > 3 > kV
> > > units in parallel to obtain 0.3 uF at 3 kV.
> > >
> > > Contact me off-list if you need some.
> > >
> > > Dr. Resonance
> >
> >
>
>
>
>
>
>