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Re: [TCML] Primary Generated Field and Coupling Coefficient
Andrew -
Nor sure what you mean by "the three different primary coils", as there are
more than three different primary configurations used in Tesla coils.
Multiple-layer pancake coils, internal vertical helixes, close-wound ribbon,
etc.
Two of the tools you can use to determine pri-sec coupling are MandK and
JAVATC. Both can be downloaded from the classictesla.com.
If you actually want to visualize the magnetic field surrounding the
primary, you can use Maxwell SV, a magnetic field simulation application
that can be downloaded (student version) from ansoft.com.
Regards,
Herr Zapp
----- Original Message -----
From: "Andrew Robinson" <teslamad@xxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Tuesday, July 07, 2009 2:38 PM
Subject: [TCML] Primary Generated Field and Coupling Coefficient
Has anyone ever mapped out the fields produced by the three different
primary coils? Is so could you PLEASE send me a link to some images or
results. What factors determine the primary geometry thats best suited for
a coil. It seems there are a lot of helical primaries on big coils, and
flat pancake primaries on medium coils. Do inverse conical primaries
achieve better efficiency? Ultimately the transfer between coils is
dependent on the change of flux, but it seems situating the secondary in a
region of closer field lines will ultimately achieve better efficiency.
Helical primaries tend to produce vertical field lines much like an ideal
solenoid, whereas flat pancake primaries produce a more torus shaped field
(Just off top of my head) The inverse primary seems to be a good middle
man between the two. Finally, can someone point me towards the formula to
determine coupling coefficient? I've heard ideal is between .05 and .2. I
need a formula to determine where I sit currently in order to make
adjustments. Thanks
~Andrew
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