[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Sphere/Toroid Comparison Chart
Original poster: "Kurt Schraner by way of Terry Fritz <twftesla-at-uswest-dot-net>" <k.schraner-at-datacomm.ch>
John C., Matt D., Terry-
John, your posting has made me to take another look at the table, Matt
D. has posted Thursday, May 03, 2001. I need to point to two facts, in
case, somebody likes to make use of this table. In any case, however,
beeing it a toroid or a sphere in TC use, I would rather prefer, to make
the E-Tesla6 calculation. The 2 facts are:
1.) Error here, in definition of diameter: NOT center-center, but
outer (maximal) diameter of toroid!!! (plausibility: Bert P.'s Eqn.)
¦
V
> C-C Chord Nom.
> Toroid Toroid Cap Equiv.Diam. Equiv.Diam.
> d1(inches) d2(inches) pf sphere (in.) sphere (m)
>
> 8 4.00 7.723 5.47 0.1390
> 8 6.00 4.540 3.22 0.0817 not feasible
> 10 4.00 10.675 7.56 0.1921
> 10 6.00 8.243 5.84 0.1484 not feasible
> 12 4.00 13.262 9.40 0.2387
> 12 6.00 11.585 8.21 0.2085
> 14 4.00 15.574 11.04 0.2803
> 14 6.00 14.605 10.35 0.2629
> 16 4.00 17.675 12.53 0.3181
> 16 6.00 17.359 12.30 0.3125
> 18 4.00 19.607 13.89 0.3529
> 18 6.00 19.893 14.10 0.3581
> 20 4.00 21.402 15.17 0.3852
> 20 6.00 22.245 15.76 0.4004
> 22 4.00 23.083 16.36 0.4155
> 22 6.00 24.444 17.32 0.4400
> 24 4.00 24.668 17.48 0.4440
> 24 6.00 26.512 18.79 0.4772
> 26 4.00 26.170 18.55 0.4711
> 26 6.00 28.469 20.18 0.5124
> 28 4.00 27.601 19.56 0.4968
> 28 6.00 30.329 21.49 0.5459
> 30 4.00 28.969 20.53 0.5214
> 30 6.00 32.103 22.75 0.5779
2.) John, I was not able to find a satisfactory way, using the equations
I find on your website, to represent the above table (trying quite a
number of some possible input data errors about C-C vs. outer d1).
Cheers
Kurt Schraner
Tesla list wrote:
>
> Original poster: "John H. Couture by way of Terry Fritz
<twftesla-at-uswest-dot-net>" <couturejh-at-worldnet.att-dot-net>
>
> The overlap is not a problem with the Toroid Capacitance Graph I show in the
> Tesla Coil Notebook because I did not use Bert Pool's equation. The
> equations I used are shown on my web site. Look for Secondary Terminal at
>
> http://home.att-dot-net/~couturejh/
>
> John Couture
>
> -----------------------------
>
> -----Original Message-----
> From: Tesla list [mailto:tesla-at-pupman-dot-com]
> Sent: Sunday, May 06, 2001 9:04 AM
> To: tesla-at-pupman-dot-com
> Subject: Re: Sphere/Toroid Comparison Chart
>
> Original poster: "by way of Terry Fritz <twftesla-at-uswest-dot-net>"
> <Mddeming-at-aol-dot-com>
>
> In a message dated 5/5/01 2:52:15 PM Eastern Daylight Time, tesla-at-pupman-dot-com
> writes:
>
> >
> > Original poster: "Barton B. Anderson by way of Terry Fritz <
> > twftesla-at-uswest-dot-net>" <tesla123-at-pacbell-dot-net>
> >
> > Hi Matt,
> >
> > The toroid C value is obviously calc'd in these (standard toroid
> > equations) as well
> > as the spheres. But there is a problem with some. Toroid cord and
> > diameters overlap
> > on some which is impossible and the equation is then wrong for those
> > toroids (and
> > also wrong for the equiv. spheres). For example, the 8" x 6" toroid. The
> > cord is 6",
> > and therefore the outer diameter must be larger than 12". This is why the
> > capacitance
> > is way off on these particular impossible toroids.
> >
> > Take care,
> > Bart A.
>
> Hi Bart!
> Thanks for pointing out the impossibilities. The table was generated for a
> range of sizes, and since I was not trying to build an impossible size, I
> guess I overlooked the silliness at the lower (upper) end of the chart.
> Since some people are talking about metallic "garden spheres" in lieu of
> toroids, I thought a quick comparison might help.
> With egg on face,
> Matt D.