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0.5*C*V*V vaild? (Was Output Voltages and Voltage/Length)


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From:  David Sharpe [SMTP:sccr4us-at-erols-dot-com]
Sent:  Wednesday, February 11, 1998 6:11 AM
To:  Tesla List
Subject:  Re: 0.5*C*V*V vaild?  (Was Output Voltages and Voltage/Length)

Tesla List wrote:
> 
> ----------
> From:  Greg Leyh [SMTP:lod-at-pacbell-dot-net]
> Sent:  Sunday, February 08, 1998 6:00 PM
> To:  Tesla List
> Subject:  Re: 0.5*C*V*V vaild?  (Was Output Voltages and Voltage/Length)
> 
> Mark S. Rzeszotarski wrote:
> 
> >         I have done considerable modelling of tesla coils and helical
> > resonators, examining the theoretical voltage rise under non-breakout
> > conditions.  I have also built a series of tesla coils with back-to-back
> > LED's placed every 2 inches along the length of the coil with various H/D
> > configurations to examine the voltage rise in these rather heavily damped
> > coil systems.  Several observations are notable:
> > 1.  The voltage distribution goes from a minimum at the base to a maximum at
> > the top when tuned to the quarter wavelength of the coil system, even in a
> > damped coil system.
> > 2.  Adding a toroid or sphere to the top tends to linearize the voltage rise
> > somewhat, so that the turn-to-turn voltage stress is lessened especially
> > near the top of the coil.
> 
> I have also noticed in PSPICE that the voltage dist
> along the sec becomes much more linear when a large
> topload is added.
> If the voltage dist along the sec is mostly linear,
> then is it reasonable to treat the sec ckt as lumped
> elements, and forget the 'antenna theory' treatment?
> 
> -GL

Mark, Greg, ALL

Duane Bylund has been stating this last hypothesis suggested by
Greg since his book "Modern Tesla Coil Theory" was introduced
in 1992.

Regards

DAVE SHARPE, TCBOR