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Re: capacitance equation for toroids
Original poster: "Dr. Resonance by way of Terry Fritz <teslalist-at-qwest-dot-net>" <resonance-at-jvlnet-dot-com>
Inches is correct and thanks for the correction. Working too late these
days!!
Dr. Resonance
Resonance Research Corporation
E11870 Shadylane Rd.
Baraboo WI 53913
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Friday, June 06, 2003 8:24 PM
Subject: Re: capacitance equation for toroids
> Original poster: "Mark Broker by way of Terry Fritz <teslalist-at-qwest-dot-net>"
<mbroker-at-thegeekgroup-dot-org>
>
> Dan, I think you should look at the equations again....
>
> d/D > 0.25: Cpf = (0.94 *d) + (0.584 * d)
>
> d/D < 0.25: Cpf = 4.57 * (D-d) / ln (8 * (D-d) / d))
> Another simple equation, although not as accurate (but close for most
> sizes) is:
>
> Cpf = D + d / 2.56
>
> For a sphere the equation is Cpf = 1.4 * dia.
>
>
> Let D = 1m (~39in), d = 10cm (~3.9in):
> Cpf = 4.57 * (1-.1) / ln (8 * (1-.1) / .1) = .96pF
> Cpf = 4.57 * (39-3.9) / ln (8 * (39-3.9) / 3.9) = 37.5pF
>
> Wintesla gives 34.2pF
>
> I'd say the units are inches ;)
>
>
> One error Dr. R's equations: the first equation should really be:
> Cpf = (0.94 * D) + (0.584 * d)
> ^^^
>
> Regards,
>
> Mark Broker
> Chief Engineer, The Geek Group
>
>
> On Fri, 06 Jun 2003 10:20:30 -0600, Tesla list <tesla-at-pupman-dot-com> wrote:
>
> >Original poster: "Mccauley, Daniel H by way of Terry Fritz
> ><teslalist-at-qwest-dot-net>" <daniel.h.mccauley-at-lmco-dot-com>
> >
> >
> >It doesn't matter its a ratio.
> >Dan
> >
> >
> >
> > > Hi Doc!
> > >
> > > Is that measured in inches, meters, cubits, furlongs, or
> > > nautical miles? ;-)
> > >
> > >
> > > Matt D.
> > >
> > >
> >
>
>
>
>
>
>