[Prev][Next][Index][Thread]
Re: Arc length vs pwr
Tesla List wrote:
>
> >From MALCOLM-at-directorate.wnp.ac.nzWed Oct 16 22:23:39 1996
> Date: Wed, 16 Oct 1996 09:37:39 +1200
> From: Malcolm Watts <MALCOLM-at-directorate.wnp.ac.nz>
> To: tesla-at-pupman-dot-com
> Subject: Re: Arc length vs pwr
>
<SNIP>>
> On the lumped vs distributed thing for the secondary: the more
> top-C you have, the more lumped it gets as the secondary current
> becomes uniform and hence 0.5LI^2 applies. That measure of magnetic
> energy cannot apply in a distributed circuit as the current is not
> uniform along the length of the coil. There would be (in my opinion)
> an optimum top-C for a given secondary and bang size because several
> things happen while increasing terminal capacitance: (1) the
> secondary inductance is becoming more effective (Q increases), (2)
> voltage holdoff is increasing (assuming more C = greater radius of
> curvature (ain't necessarily so), and (3) output will eventually
> decrease due to energy limitation. It would be jolly nice to quantify
> this optimum R.O.C. and size.
>
<SNIP>
Malcolm,
Another thought:
We could simply use a toroid with a large enough R.O.C. that it never
breaks out over the power range applied. By carefully adjusting the
height of a foil "bump", we can "tweak" breakout such that it was
optimal for a given power level. Overall capacitance could be
independently changed by increasing the larger diameter of the toroid.
This would remove the R.O.C. as a variable, leaving only the question of
optimal top capacitance.
-- Bert --