Re: Fwd: [jlnlabs] TESLA COIL REVISED

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

Original poster: dhmccauley-at-spacecatlighting-dot-com 

John,

I believe the Cp/Cs and Ls/Lp ratios are identical.

In a "tuned" classic tesla coil, the design parameter is that Cp*Lp=Cs*Ls

If you play with that equation, you'll find the gain equations using Cp/Cs
and Ls/Lp are identical as Cp and Cs will
vary with Lp and Ls to maintain the tuned design parameter Cp*Lp=Cs*Ls.

Dan


 > Ed, Dan -
 >
 > This is a typical unsolved (?) Tesla coil problem. Which ratio, Cp/Cs or
 > Ls/Lp do you use to find  the true spark (gain) when the input wattage is
 > the same? The other effective spark length parameter in the TC is the
 > overall efficiency. What capacitive or inductive ratios give the best
 > overall efficiencies? This would depend on the complex wave currents which
 > are different for a capacitive load compared to a inductive load. The
 > question is which ratio gives the best efficiency the optimum capacitive
 > ratio or the optimum inductive ratio? It is relatively easy to adjust
either
 > ratio for a tuned system. To my knowledge this type of question has never
 > been answered for Tesla coils.
 >
 >     John Couture
 >
 > ----------------------------
 >
 >
 > -----Original Message-----
 > From: Tesla list [mailto:tesla-at-pupman-dot-com]
 > Sent: Saturday, January 03, 2004 10:12 PM
 > To: tesla-at-pupman-dot-com
 > Subject: Re: Fwd: [jlnlabs] TESLA COIL REVISED6
 >
 >
 > Original poster: Ed Phillips <evp-at-pacbell-dot-net>
 >
 > "By reducing the number of turns in your secondary, you are reducing the
 > inductance.  Maintaining a constant primary side of your coil, you will
 > need
 > to increase
 > the topload of your secondary to maintain resonance.  Now since GAIN =
 > SQRT
 > (C1/C2) it is fairly obvious that by increasing C2 you are decreasing
 > the
 > maximum
 > theoretical gain of your secondary.
 >
 > Dan"
 >
 > Note that, if both primary and secondary are in tune, the secondary to
 > primary inductance ratio can be used instead.  However, since the energy
 > in the secondary was stored in the primary CAPACITOR before the gap
 > fired, I prefer to think in terms of the capacitance ratio.
 >
 > Ed
 >
 >
 >
 >
 >