Re: MMCs & Currents

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

Original poster: "Steven Ward by way of Terry Fritz <twftesla-at-qwest-dot-net>" <srward16-at-hotmail-dot-com>

Hi Ted,

You nailed it!!  I was only getting the 396A because i didnt know that the 
Voltage was supposed to be the peak voltage.  Like you calculated, im trying 
to run my coil sort of low at about 150khz (maybe less).  Well 571A is still 
less than what i think the caps are rated for (854A) so wish me luck.

Steve Ward.


>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: Re: MMCs & Currents
>Date: Thu, 01 Aug 2002 07:38:47 -0600
>
>Original poster: "tesla by way of Terry Fritz <twftesla-at-qwest-dot-net>" 
><tesla-at-paradise-dot-net.nz>
>
>Hi Steve
>Making the assumptions that your coil has
>28.3nF Cp
>15kv NST
>Tunes at Lp of 39uH
>Operates at 151.5kHz (ie 28.3nF/39uH)
>If these assumptions are wrong let me know but the numbers will still be
>similar if your coil is close
>
>If it fires at Vpk of 21.2kV I calculate an Ipk of 571amps
>CV^2=LI^2
>Ipk=[CV^2/L]^0.5
>
>As I say I do not yet know how to calculate Irms but Terry's advice on this
>posted to you recently seems to assist on that point.
>Best
>Ted L  in NZ
>
> >
> > Ok for these equations to figure out the Ipeak of my circuit, assuming
>that
> > Cp is in uf and L is in uH, it looks like id be ok with the I peak 
>rating.
> > With my full 14 turn primary i have an inductance of 80uH, which if i
> > calculated correctly will yield an I of 280A.  And calculating with a 10
> > turn primary(39uH), i got 396A.  Am i calculating this correctly??  The
> > numbers look ok, are they?  And if so is IRMS still a problem?  Thanks,
> >
> > Steve Ward
> >