RE: Calculating E-Field of SSTC or Tesla Coil

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

Original poster: "John H. Couture by way of Terry Fritz <teslalist-at-qwest-dot-net>" <couturejh-at-mgte-dot-com>


Terry -

There appears to be no way to check E-Tesla6 with the TSSP graph and the
Wheeler and Medhurst equations. This means that this graph and these
equations should not be used for Tesla coils?

John Couture

---------------------------


-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Friday, July 25, 2003 9:56 PM
To: tesla-at-pupman-dot-com
Subject: RE: Calculating E-Field of SSTC or Tesla Coil


Original poster: "Terry Fritz" <teslalist-at-qwest-dot-net>

Hi John,

If the room is 300 inches high and the coil is 200 inches high...  C top
will increase just as good ol' E-Tesla predicts ;-))  It's that C is
proportional to 1/d thing...

What is this "No surroundings effect" stuff!!!   With the ceiling only 1/2
of the secondary height away, "surrounding effects" will be dramatic!!!!

I am concerned the E-Tesla and TSSP seem to disagree since TSSP uses much
of the same theory as E-Tesla.  It is possible the E-Tesla was confused by
such a close ceiling but it should have reported the usual warnings.  I
would need the full "output.txt" file to really know what is going
on...  E-Tesla is very good at "tight places" stuff...

Can you tell me the actual input data to E-Tesla and I can easily check it
all out.  E-Tesla creates a diagnostic file that can easily plot all the
fields and where it is "thinking"...  Bobo's are pretty apparent then...

Cheers,

          Terry




At 09:34 PM 7/25/2003 -0400, you wrote:

 >Terry -
 >
 >There appears to be a problem with E-Tesla6. The program is showing an
 >incorrect Fres when compared to TSSP and JHCTES. This is due to the Cpf
 >being too large.
 >
 >Bare secondary coil is isolated in center of room
 >Ceiling and walls 300"
 >Pri and sec windings at 200"
 >No surroundings effect
 >
 >                     TSSP     JHCTES       E-Tesla6
 >
 >Fres KHz  about     150      149.71        139.91
 >
 >C pf                ---       13.30         16.38
 >
 >Sec Ind mh          ---       84.97         84.97
 >
 >When the capacitance effects of the surroundings are taken into
 >consideration (ceiling and walls = 100) the C pf should decrease and the
 >Fres should increase???
 >
 >John Couture
 >
 >--------------------------------
 >
 >
 >-----Original Message-----
 >From: Tesla list [mailto:tesla-at-pupman-dot-com]
 >Sent: Friday, July 25, 2003 3:57 PM
 >To: tesla-at-pupman-dot-com
 >Subject: Re: Calculating E-Field of SSTC or Tesla Coil
 >
 >
 >Original poster: "Terry Fritz" <teslalist-at-qwest-dot-net>
 >
 >Hi Dan,
 >
 >E-Tesla6 can calculate x/y arrays of numbers that can be imported into
 >Excel or MathCad.  See the readme file and the other site:
 >
 >http://hot-streamer-dot-com/TeslaCoils/Programs/E-Tesla6.zip
 >
 >http://hot-streamer-dot-com/andrewb/models/models.htm
 >
 >The program is really to find Fo, but we have had great fun with the data
 >that can be plotted from the array work files.
 >
 >Cheers,
 >
 >          Terry
 >
 >
 >
 >At 03:25 PM 7/25/2003 -0400, you wrote:
 >
 > >Anyone have any information on how to calculate the E-field
 > >(approximately) of a tesla coil.
 > >I saw an old post that stated Terry had an E-Field calculator program,
 > >but i didn't see one on the
 > >hot-streamer site.
 > >
 > >Any help appreciated.
 > >Thanks
 > >
 > >Dan