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Re: Racing sparks vs. primary design
Original poster: Terry Fritz <teslalist@xxxxxxxxxxxxxxxxxxxxxxx>
Hi,
MandK can do it two if you take the coil in 0.5 inch sections:
----------------------
Mutual Inductance Program V3.1
Copyright (c) 1998, 1999, 2000 by Mark S. Rzeszotarski, Ph.D.
Flat Spiral Primary Coil Geometry
Primary coil inside diameter (inches)= 6.800
Primary coil outside diameter (inches)= 16.200
Number of primary coil turns = 13.000
Wire diameter (inches)= .2500
Solenoidal Secondary Coil Geometry
Secondary coil diameter (inches)= 6.000
Secondary coil height (inches)= .500
Number of secondary coil turns = 68.000
Secondary coil wire diameter (inches)= .0126
Mutual Inductance Results
Position is the secondary coil bottom wire position in inches
above the bottom wire of the primary coil.
A negative value means the bottom wire of the
secondary is below the bottom wire of the primary.
A positive value means that the bottom wire of the
secondary is above the bottom wire of the primary coil.
M = Mutual Inductance in microhenries
K = Coefficient of Coupling: K = M / square root ( Lp x Ls )
Position M K
.000 87.628 .3039
.500 80.644 .2797
1.000 71.829 .2491
1.500 63.184 .2191
2.000 55.253 .1916
2.500 48.181 .1671
3.000 41.972 .1456
3.500 36.568 .1268
4.000 31.892 .1106
4.500 27.858 .0966
5.000 24.383 .0846
5.500 21.391 .0742
6.000 18.814 .0653
6.500 16.592 .0575
7.000 14.673 .0509
7.500 13.013 .0451
8.000 11.573 .0401
8.500 10.322 .0358
9.000 9.232 .0320
9.500 8.280 .0287
10.000 7.446 .0258
10.500 6.714 .0233
11.000 6.069 .0210
11.500 5.500 .0191
12.000 4.996 .0173
12.500 4.549 .0158
13.000 4.151 .0144
13.500 3.797 .0132
14.000 3.480 .0121
14.500 3.196 .0111
15.000 2.940 .0102
15.500 2.711 .0094
16.000 2.504 .0087
16.500 2.316 .0080
17.000 2.147 .0074
17.500 1.993 .0069
18.000 1.853 .0064
18.500 1.725 .0060
19.000 1.609 .0056
19.500 1.503 .0052
20.000 1.405 .0049
-----------------------
Cheers,
Terry
At 04:58 PM 7/11/2005, you wrote:
On Mon, 11 Jul 2005 12:57:40 -0500, Tesla list <tesla@xxxxxxxxxx> wrote:
Original poster: "Gerry Reynolds" <gerryreynolds@xxxxxxxxxxxxx>
Hi Malcolm,
One might try to break the secondary into segments and see what the
coupling is into each segment using JavaTC. Certainly, the upper most
segment would have the least coupling and the bottom segment would have the
most coupling. The outer turn of a flat pancake primary would give the most
uniform coupling across the various segments and the inner turn of the
pancake would give the least uniform coupling.
I believe Antonio's program "Inca" can handle something like this:
http://www.coe.ufrj.br/~acmq/programs/inca.zip
http://www.coe.ufrj.br/~acmq/tesla/maxwell.pdf
Mark Broker
The Geek Group