Tesla coil calculations

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

Original poster: Terry Fritz <teslalist-at-twfpowerelectronics-dot-com>

Hi Antonio,

I just wanted to say a big THANKS for the work you, Paul, Bart, and others 
have done on all these super powerful Tesla coil programs!!!  I for one am 
stunned at the pace things have been progressing in the computer simulation 
area.

I know it takes a giant amount of time and effort to do this stuff.  But 
the work you guys are doing will stand forever as a milestone to Tesla 
coiling theory!!

Thanks!!

Cheers,

         Terry

At 05:09 PM 12/22/2003, you wrote:

>Yes, the sphere repels the charges in the toroid. It's not difficult to
>find a sphere size that results in identical maximum fields at the
>sphere and at the toroid. With larger spheres, breakout will be at the
>toroid. With smaller spheres, at the sphere. The height of the sphere
>above the toroid has influence too, as well as the aspect ratio of the
>toroid.
>
>I have not implemented a cylinder with nonuniform voltage, required
>for the modelling of a Tesla coil secondary. But it's possible to
>assemble below the terminal a series of cylinders with specified
>voltages. In the limit each can have just one ring.
>
>I have made some updates in the Inca (ICCDTR) program:
>- The maximum electric field can be adjusted, if you don't like 30
>kV/cm.
>- I have included some exact calculations:
>- Exact maximum electric field at the surface of a toroid, and the
>   exact (ideal) breakdown voltage. It can generate a table with exact
>   capacitances and breakdown voltages.
>- Exact potential around a toroid, and the exact electric field at the
>   central plane (to be later extended to all space).
>- Exact maximum electric field and ideal breakdown voltage for a
>   two-spheres spark gap, with different spheres.
>The exact calculations are useful to test the precision of the numerical
>calculations. The exact solutions for potential and electric field for
>a toroid are somewhat badly conditioned numerically. The precision that
>can be obtained is not as good as with capacitances, specially in the
>case of the surface field.
>
>A Linux version is in the works, as I have already found how to use
>Kylix.
>
>Antonio Carlos M. de Queiroz