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Re: Tom Heiber <theiber-at-lonet.ca>
Subject: Re: Tom Heiber <theiber-at-lonet.ca>
Date: Fri, 30 May 1997 16:33:59 -0400
From: Tom Heiber <theiber-at-lonet.ca>
Organization: Power Surge
To: Tesla List <tesla-at-pupman-dot-com>
References:
1
Tesla List wrote:
>
> From: Tom Heiber <theiber-at-lonet.ca>
> > Organization: Power Surge
> > To: tesla-at-pupman-dot-com
> >
> >
> > This is an equation I got from Bert Pool's file.
> >
> >
> > =======================================================================
> > EQUATION 10: CAPACITANCE OF A TOROID
> > ___________________
> > / 2
> > C =(1+ (0.2781 - d2/d1)) x 2.8 x / 2 pi (d1-d2)(d2/2)
> > / -------------------
> > \/ 4 pi
> >
> >
> > C = capacitance in picofarads (+- 5% )
> > d1 = outside diameter of toroid in inches
> > d2 = diameter of cross section (cord) of toroid in inches
> >
> > Equation courtesy of Bert Pool
> >
> > =======================================================================
> >
> >
> > CAN ANYONE help me solve for D1 as in D1=........
> > I have been trying to do this without any results (I suck at math)
>
> Turns out to be a bit of a horror.
> Firstly, the original can be considerably simplified (assuming
> the form above is correct):
>
> C = ( 0.695 - 2.5(d2/d1) ) x SQRT( d2(d1-d2) )
>
> As far as I've got with attempting to extract d1 (hopefully no
> errors):
>
> (C^2)/d2 = 0.476d1 - 3.9d2 + 3.425(d2^2) + (d2^2)/d1 - (d2^3)/(d1^2)
>
> I have reservations about all this anyway because it doesn't
> factor in the proximity of the toroid to the resonator.
>
> FWIW,
> Malcolm
Thanx. I'll check it with other results. (I got 4 diffrent resluts). But
thanx for trying even if it's not right :)
Tom Heiber