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JavaTC Major Update version 9.0
Original poster: "Barton B. Anderson by way of Terry Fritz <twftesla-at-qwest-dot-net>" <tesla123-at-pacbell-dot-net>
Hi All, (Terry, long due to data inserted).
Major updates to JavaTC Designer. Version 9.0 has been uploaded:
<http://www.classictesla-dot-com/java/javatc.html>http://www.classictesla-dot-com/j
ava/javatc.html
If you dont' see "JavaTC 9.0", reload your browser.
Changes to v9.0:
*****************
Added Mutual Inductance and Coupling Coefficient as part of the design process.
This institutes an added input box in the Primary Coil Design for Primary
Height (inner turn in reference to the secondary bottom turn). At the bottom of
this post is "data" reflecting JavaTC run against ACMI.
Angled Primary Inductance (conical coils) has been updated. The standard
equations we all know so well for conical coils is fine for flat and helical
geometry's (0 and 90 deg. angles). However, when angles between 1 and 89 are
used, the accuracy falls off as the angle gets closer and closer to midpoint
(45 deg). Yes, the irony of it all! This has been improved in JavaTC v9.0 to
better reflect inductance in conical geometry primary coils.
AUTO-TUNE Feature has been completely rewritten. I no longer step through
numerous iterations (due to the type of equation, a back-calculating method was
not optional). For some geometry's, numerous iterations caused problems with
browsers. No more, I found the cause and completely changed the method used.
AUTO-TUNE will now occur very fast without error.
Found a problem with IE6 (Internet Explorer). Problem in Meta tag caused
problems with displaying the page in IE browsers. This has been corrected.
*******************
MUTUAL INDUCTANCE & COUPLING COEFFICIENT. I wanted a mutual inductance value
that would change on the fly with any affecting dimensional change and I wanted
these values to be a close approximation so coilers can have a good idea of the
inductive coupling between primary and secondary while designing a coil. A lot
of my work this past month has been behing a pc.
I've tested JavaTC against ACMI with a few of the coils from the JavaTC
database. I think you will be amazed. For the following data, I simply loaded
up the coil in JavaTC and calculated. I then put the same inputs into ACMI and
produced a simple output txt file. I then opened the file and typed in the
JavaTC numbers below the Acmi numbers. Here are the results:
8.4375 x 40.375 -at- 0 deg, 0 height, 1817.1 turn coil, 24awg.
SCNY.L| SCNY.R| PRMY.L| PRMY.R|SCNY-PRMY.M|SCNY-PRMY.K
135.31 mH| 104.18| 122.90 uH| 0.01| 566.08 uH| 0.1388 Acmi
133.03 mH| 103.06| 124.46 uH| n/a | 565.32 uH| 0.1389 JavaTC
6 x 22.73 -at- 0 deg, 0 height, 1000 turn coil, 24 awg
SCNY.L| SCNY.R| PRMY.L| PRMY.R|SCNY-PRMY.M|SCNY-PRMY.K
35.74 mH| 40.77| 42.87 uH| 0.01| 188.56 uH| 0.1523 Acmi
35.39 mH| 40.33| 43.89 uH| n/a | 188.55 uH| 0.1513 JavaTC
4.25 x 20.0 -at- 0 deg, 0 height, 787.4 turn coil, 22 awg.
SCNY.L| SCNY.R| PRMY.L| PRMY.R|SCNY-PRMY.M|SCNY-PRMY.K
12.86 mH| 14.24| 25.58 uH| 0.00| 81.32 uH| 0.1418 Acmi
12.78 mH| 14.09| 25.87 uH| n/a | 81.79 uH| 0.1423 JavaTC
12.75 x 43.25 -at- 0 deg, 0 height, 981.8 turn coil, 18 awg.
SCNY.L| SCNY.R| PRMY.L| PRMY.R|SCNY-PRMY.M|SCNY-PRMY.K
80.70 mH| 21.16| 94.24 uH| 0.01| 480.16 uH| 0.1741 Acmi
79.98 mH| 20.93| 96.47 uH| n/a | 480.10 uH| 0.1728 JavaTC
1.5 x 12 -at- 0 deg. 1016.9 turn coil, 30 awg.
SCNY.L| SCNY.R| PRMY.L| PRMY.R|SCNY-PRMY.M|SCNY-PRMY.K
4653.56 uH| 41.87| 4.05 uH| 0.01| 15.27 uH| 0.1112 Acmi
4590.00 uH| 41.43| 4.15 uH| n/a | 15.35 uH| 0.1111 JavaTC
***********
The following is a coil run through a range of angles from 0 to 90 degrees in
10 degree increments: NOTE: you may notice JavaTC inductances are constant.
This is due to running the AUTO-TUNE funtion to tune the coil, thus keeping L
constant (via changing turns). ACMI numbers reflect JavaTC's number of turn
changes meaning both programs have identical inputs).
8.4375 x 40.375 -at- 0 height, 1817.1 turn coil, 24awg.
-at- 0 deg
SCNY.L| SCNY.R| PRMY.L| PRMY.R|SCNY-PRMY.M|SCNY-PRMY.K
135.31 mH| 104.18| 122.90 uH| 0.01| 566.08 uH| 0.1388 Acmi
133.03 mH| 103.06| 124.46 uH| n/a | 565.32 uH| 0.1389 JavaTC
-at- 10 deg
SCNY.L| SCNY.R| PRMY.L| PRMY.R|SCNY-PRMY.M|SCNY-PRMY.K
135.31 mH| 104.18| 127.25 uH| 0.01| 627.81 uH| 0.1513
133.03 mH| 106.03} 124.46 uH| n/a | 625.72 uH| 0.1538
-at- 20 deg
SCNY.L| SCNY.R| PRMY.L| PRMY.R|SCNY-PRMY.M|SCNY-PRMY.K
135.31 mH| 104.18| 125.78 uH| 0.01| 685.67 uH| 0.1662 Acmi
133.03 mH| 106.03| 124.46 uH| n/a | 684.59 uH| 0.1682 JavaTC
-at- 30 deg
SCNY.L| SCNY.R| PRMY.L| PRMY.R|SCNY-PRMY.M|SCNY-PRMY.K
135.31 mH| 104.18| 123.55 uH| 0.01| 751.60 uH| 0.1838 Acmi
133.03 mH| 103.6 | 124.46 uH| n/a | 750.47 uH| 0.1844 JavaTC
-at- 40 deg.
SCNY.L| SCNY.R| PRMY.L| PRMY.R|SCNY-PRMY.M|SCNY-PRMY.K
135.31 mH| 104.18| 121.76 uH| 0.01| 833.08 uH| 0.2052 Acmi
133.03 mH| 103.6 | 124.46 uH| n/a | 827.36 uH| 0.2033 JavaTC
-at- 50 deg.
SCNY.L| SCNY.R| PRMY.L| PRMY.R|SCNY-PRMY.M|SCNY-PRMY.K
135.31 mH| 104.18| 120.63 uH| 0.01| 937.90 uH| 0.2321 Acmi
133.03 mH| 103.6 | 124.46 uH| n/a | 920.54 uH| 0.2262 JavaTC
-at- 60 deg.
SCNY.L| SCNY.R| PRMY.L| PRMY.R|SCNY-PRMY.M|SCNY-PRMY.K
135.31 mH| 104.18| 120.06 uH| 0.01| 1080.43 uH| 0.2681 Acmi
133.03 mH| 103.6 | 124.46 uH| n/a | 1041.26 uH| 0.2559 JavaTC
-at- 70 deg.
SCNY.L| SCNY.R| PRMY.L| PRMY.R|SCNY-PRMY.M|SCNY-PRMY.K
135.31 mH| 104.18| 120.07 uH| 0.01| 1290.13 uH| 0.3201 Acmi
133.03 mH| 103.6 | 124.46 uH| n/a | 1215.95 uH| 0.2988 JavaTC
-at- 80 deg.
SCNY.L| SCNY.R| PRMY.L| PRMY.R|SCNY-PRMY.M|SCNY-PRMY.K
135.31 mH| 104.18| 121.07 uH| 0.01| 1654.27 uH| 0.4087 Acmi
133.03 mH| 103.6 | 124.46 uH| n/a | 1524.58 uH| 0.3747 JavaTC
-at- 90 deg.
SCNY.L| SCNY.R| PRMY.L| PRMY.R|SCNY-PRMY.M|SCNY-PRMY.K
135.31 mH| 104.18| 123.37 uH| 0.01| 2660.14 uH| 0.6511 Acmi
133.03 mH| 103.6 | 124.46 uH| n/a | 2405.16 uH| 0.5911 JavaTC
************
Here are primary height adjustments up and down the secondary in increments of
0.5", up to 5" (above and below):
0.5" (primary raised above secondary bottom turn)
SCNY.L| SCNY.R| PRMY.L| PRMY.R|SCNY-PRMY.M|SCNY-PRMY.K
135.31 mH| 104.18| 122.90 uH| 0.01| 599.32 uH| 0.1470 Acmi
133.03 mH| 103.06| 124.45 uH| n/a | 596.50 uH| 0.1466 JavaTC
1.0"
SCNY.L| SCNY.R| PRMY.L| PRMY.R|SCNY-PRMY.M|SCNY-PRMY.K
135.31 mH| 104.18| 122.90 uH| 0.01| 631.76 uH| 0.1549 Acmi
133.03 mH| 103.06| 124.45 uH| n/a | 627.50 uH| 0.1542 JavaTC
1.5"
SCNY.L| SCNY.R| PRMY.L| PRMY.R|SCNY-PRMY.M|SCNY-PRMY.K
135.31 mH| 104.18| 122.90 uH| 0.01| 662.86 uH| 0.1625 Acmi
133.03 mH| 103.06| 124.45 uH| n/a | 658.14 uH| 0.1617 JavaTC
2.0"
SCNY.L| SCNY.R| PRMY.L| PRMY.R|SCNY-PRMY.M|SCNY-PRMY.K
135.31 mH| 104.18| 122.90 uH| 0.01| 692.33 uH| 0.1698 Acmi
133.03 mH| 103.06| 124.45 uH| n/a | 688.27 uH| 0.1691 JavaTC
2.5"
SCNY.L| SCNY.R| PRMY.L| PRMY.R|SCNY-PRMY.M|SCNY-PRMY.K
135.31 mH| 104.18| 122.90 uH| 0.01| 720.06 uH| 0.1766 Acmi
133.03 mH| 103.06| 124.45 uH| n/a | 717.69 uH| 0.1764 JavaTC
3.0"
SCNY.L| SCNY.R| PRMY.L| PRMY.R|SCNY-PRMY.M|SCNY-PRMY.K
135.31 mH| 104.18| 122.90 uH| 0.01| 746.03 uH| 0.1829 Acmi
133.03 mH| 103.06| 124.45 uH| n/a | 746.23 uH| 0.1834 JavaTC
3.5"
SCNY.L| SCNY.R| PRMY.L| PRMY.R|SCNY-PRMY.M|SCNY-PRMY.K
135.31 mH| 104.18| 122.90 uH| 0.01| 770.26 uH| 0.1889 Acmi
133.03 mH| 103.06| 124.45 uH| n/a | 773.72 uH| 0.1902 JavaTC
4.0"
SCNY.L| SCNY.R| PRMY.L| PRMY.R|SCNY-PRMY.M|SCNY-PRMY.K
135.31 mH| 104.18| 122.90 uH| 0.01| 792.80 uH| 0.1944 Acmi
133.03 mH| 103.06| 124.45 uH| n/a | 799.99 uH| 0.1966 JavaTC
4.5"
SCNY.L| SCNY.R| PRMY.L| PRMY.R|SCNY-PRMY.M|SCNY-PRMY.K
135.31 mH| 104.18| 122.90 uH| 0.01| 813.75 uH| 0.1996 Acmi
133.03 mH| 103.06| 124.45 uH| n/a | 824.85 uH| 0.2027 JavaTC
5.0"
SCNY.L| SCNY.R| PRMY.L| PRMY.R|SCNY-PRMY.M|SCNY-PRMY.K
135.31 mH| 104.18| 122.90 uH| 0.01| 833.19 uH| 0.2043 Acmi
133.03 mH| 103.06| 124.45 uH| n/a | 848.13 uH| 0.2084 JavaTC
-0.5" (primary lowered below secondary bottom turn)
SCNY.L| SCNY.R| PRMY.L| PRMY.R|SCNY-PRMY.M|SCNY-PRMY.K
135.31 mH| 104.18| 122.90 uH| 0.01| 532.84 uH| 0.1307 Acmi
133.03 mH| 103.06| 124.45 uH| n/a | 534.15 uH| 0.1313 JavaTC
-1.0"
SCNY.L| SCNY.R| PRMY.L| PRMY.R|SCNY-PRMY.M|SCNY-PRMY.K
135.31 mH| 104.18| 122.90 uH| 0.01| 500.36 uH| 0.1227 Acmi
133.03 mH| 103.06| 124.45 uH| n/a | 503.15 uH| 0.1237 JavaTC
-1.5"
SCNY.L| SCNY.R| PRMY.L| PRMY.R|SCNY-PRMY.M|SCNY-PRMY.K
135.31 mH| 104.18| 122.90 uH| 0.01| 469.18 uH| 0.1151 Acmi
133.03 mH| 103.06| 124.45 uH| n/a | 472.51 uH| 0.1161 JavaTC
-2.0"
SCNY.L| SCNY.R| PRMY.L| PRMY.R|SCNY-PRMY.M|SCNY-PRMY.K
135.31 mH| 104.18| 122.90 uH| 0.01| 439.59 uH| 0.1078 Acmi
133.03 mH| 103.06| 124.45 uH| n/a | 442.38 uH| 0.1087 JavaTC
-2.5"
SCNY.L| SCNY.R| PRMY.L| PRMY.R|SCNY-PRMY.M|SCNY-PRMY.K
135.31 mH| 104.18| 122.90 uH| 0.01| 411.71 uH| 0.1010 Acmi
133.03 mH| 103.06| 124.45 uH| n/a | 412.96 uH| 0.1015 JavaTC
-3.0"
SCNY.L| SCNY.R| PRMY.L| PRMY.R|SCNY-PRMY.M|SCNY-PRMY.K
135.31 mH| 104.18| 122.90 uH| 0.01| 385.56 uH| 0.0945 Acmi
133.03 mH| 103.06| 124.45 uH| n/a | 384.42 uH| 0.0945 JavaTC
-3.5"
SCNY.L| SCNY.R| PRMY.L| PRMY.R|SCNY-PRMY.M|SCNY-PRMY.K
135.31 mH| 104.18| 122.90 uH| 0.01| 361.12 uH| 0.0886 Acmi
133.03 mH| 103.06| 124.45 uH| n/a | 356.93 uH| 0.0877 JavaTC
-4.0"
SCNY.L| SCNY.R| PRMY.L| PRMY.R|SCNY-PRMY.M|SCNY-PRMY.K
135.31 mH| 104.18| 122.90 uH| 0.01| 338.33 uH| 0.0830 Acmi
133.03 mH| 103.06| 124.45 uH| n/a | 330.66 uH| 0.0813 JavaTC
-4.5"
SCNY.L| SCNY.R| PRMY.L| PRMY.R|SCNY-PRMY.M|SCNY-PRMY.K
135.31 mH| 104.18| 122.90 uH| 0.01| 317.10 uH| 0.0778 Acmi
133.03 mH| 103.06| 124.45 uH| n/a | 305.80 uH| 0.0752 JavaTC
-5.0"
SCNY.L| SCNY.R| PRMY.L| PRMY.R|SCNY-PRMY.M|SCNY-PRMY.K
135.31 mH| 104.18| 122.90 uH| 0.01| 297.35 uH| 0.0729 Acmi
133.03 mH| 103.06| 124.45 uH| n/a | 282.52 uH| 0.0694 JavaTC
****************
As you can see, JavaTC is doing pretty well for a close approximation. I'm
using simple (but long) equations to derive mutual inductance. JavaTC is not a
program like Acmi, JavaTC is a browser calculator for Tesla Coil design. The
approximation should be accurate enough for typical geometry's but will fall
off if geometry's are way out in no-mans land.
For Tesla Coils, this will be a GREAT design consideration. If your shooting
for a specific K factor, simply change primary dimensions that affect K and
press the AUTO-TUNE button. The new K factor will be calculated in a flash (and
the turns will be tuned)!
Take care,
Bart
------------------
Barton B. Anderson
www.classictesla-dot-com