Re: MMCs & Currents

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

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
>