[Prev][Next][Index][Thread]
Re: Vtop vs coil length
Doc.R, stephan, all:
This sure has impressed on me, that I should not push this coil much
further, since I am close to a spark =3 'coillength.
Tesla List skrev:
>
> Original Poster: "STK" <STK.TC-at-gmx-dot-net>
>
> Hi Finn, Doc R., all,
>
snip
> My question is, how did you calculate the voltage?
I was using:
Vout = SQRT(2*Ep/Ctot) From one of Malcoms old postings.
where Ep=0.5*Cp*Vc^2
>
bigsnip
> Do you agree with my math here or did you calculate the voltage
> in an other way?
Stephan, It is not up to me to agree with your math, I simply study it,
give up, and save it in my TC-Math txt file, and hope to, if not
understand it, then at least use it, some day..... :-)
>
> For your present coil, I have found the following parameters
> on your website:
>
Comments in brackets:
> tank circuit:
> Up = 20kV
> Cp = 33nF (34,2 nF)
>
> secondary:
> 250mm
> N=807
> 0,95mm wire (plus 0,08 mm lacquer =1.03mm)
> winding length therefore about 79cm (my guess) ( 83,12 cm)
> this works out to Cself=18.9pF (???) (More like 16 pF)
> (L=45.7mH, f0=171kHz, f=101kHz)
>
> toroid:
> seems to be 250mm ducting (32 cm)
> If this is true, the mean diameter seems to be 72cm (64)
> together with the anti corona ring you have approx.
> Ctop=35pF (???) (39 pF)
>
> Im missing a 'specs-page' on your Website! ;-) (I`l look into that :-)
>
> Throwing all the data into formula (3), we get
> Utop= 20kV * sqr(33nF/(18.9/4+35)pF)
> = 20kV * sqr(33000/39.7)
> = 576kV (close enough)
snip
> Cheers, Stefan
> \_ _ _/\_________________________________
> \_______ _/ `--' |
> (_(_|_)_)< ` Reply to: STK.TC-at-gmx-dot-net, please |
> _ __/ |_| \_ visit "Stefans Tesla coil pages" |
> \_/ ` |_| ` with lots of photographs, formulas |
> _/ .__|_|__. and technical infos around TCs at |
> /_______\-|-|-/___ http://privat.schlund.de/skluge/toc.htm _|
>
> Dieses Dokument wurde elektronisch erstellt und ist auch ohne
> Umlaute gueltig.
>
> Famous last words: Oh, a Tesla coil - I heard you can touch
> it without getting hurt --> Zzzzzapp ...