RE: Mutual Inductance & K Factor

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

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


Bart -

All the present mutual inductance and K Factor programs are based on
empirical data. The accuracy of the data determines the accuracy 0f the
programs. Unfortunately the necessary testing required for accurate Lm and K
equations has not been done like for the equations that have ben made for
the inductance of a solenoid coil (Wheeler and others).

The JHCTES program is based on older tests than the Java9.1 program so Java
and Acmi may be more accurate. For some time now I have thought that the Lm
and K outputs of the JHCTES were too high. In fact I am working on changes
in the program that involve Lm and K Factor. The problem is that there is
not enough good test data like yours available to justify changes at this
time.  Once the test data becomes available then the more accurate equations
giving more accurate programs can be made. If test data becomes available
for Nolan's TC that will be a big step in the right direction.

One thing that would help is for coilers to agree on the kind of tests to be
made. This would help to solve some of the many unknowns of the classical
Tesla coil including the optimum coupling.

John Couture

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


-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Sunday, March 17, 2002 9:20 AM
To: tesla-at-pupman-dot-com
Subject: Re: Mutual Inductance & K Factor


Original poster: "Barton B. Anderson by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <tesla123-at-pacbell-dot-net>

Hi John,

Tesla list wrote:

> Original poster: "John H. Couture by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <couturejh-at-mgte-dot-com>
>
> It will be interesting to find the true mutual inductances and K Factors
if
> Nolan tests his coil for these two parameters.

Yes, it's always interesting to do this. I put my money that Acmi will nail
it. Since Paul introduced
it, I've been measuring for Paul on different occasions and for my own
purposes. Acmi has nailed it
every time.

I'm confident because I've done the measuring over and over again. Acmi has
given me the ability to
develop approximations for JavaTC. I don't have the ability to perform the
type of programming Paul
used (C code 'structs', etc.), but it gave me data. The reason JavaTC gets
real close to Acmi is
because that's what I wrote it do (because I trust Acmi that much - proof
is in the measuring). I
wasn't the only one making measurements. Terry and others had the same
success.

What I'm not sure about is a 1:1 h/d secondary. I'm not sure if we've
actually made a 1:1 h/d check
with a real coil (maybe we did and I'm just unaware).

Take care,
Bart