Re: Racing sparks vs. primary design

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Antonio Carlos M. de Queiroz" <acmdq@xxxxxxxxxx>

Tesla list wrote:
> Original poster: "Mark Broker" <mbroker@xxxxxxxxxxxxxxxx>
> On Mon, 11 Jul 2005 12:57:40 -0500, Tesla list <tesla@xxxxxxxxxx> wrote:
>
> > Original poster: "Gerry  Reynolds" <gerryreynolds@xxxxxxxxxxxxx>
> >
> > Hi Malcolm,
> >
> > One might try to break the secondary into segments and see what the
> > coupling is into each segment using JavaTC.  Certainly, the upper most
> > segment would have the least coupling and the bottom segment would have the
> > most coupling. The outer turn of a flat pancake primary would give the most
> > uniform coupling across the various segments and the inner turn of the
> > pancake would give the least uniform coupling.
>
> I believe Antonio's program "Inca" can handle something like this:
> http://www.coe.ufrj.br/~acmq/programs/inca.zip
> http://www.coe.ufrj.br/~acmq/tesla/maxwell.pdf

It's easy to see this with the program. It actually calculates internally
the mutual inductances between all pairs of turns of the primary and
secondary coils, but it doesn't save the calculations. You can split the
coils in sets of turns, and even single turns, and calculate the mutual
inductances.

Example:
Using the initial values in the program, M = 0.226 mH
Splitting the secondary in two, the mutual inductances are:
Upper part: 0.034 mH
Lower part: 0.192 mH
Checking: 0.192 mH + 0.034 mH = 0.226 mH

Antonio Carlos M. de Queiroz