[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: PFC Question]

Original poster: "Barton B. Anderson" <bartb@xxxxxxxxxxxxxxxx>

Hi David,

I got your data on the coil and ran the numbers including the corona ring. The cap size he's using is .157uF. So, if it's a 10kva pig, then he's just slightly above resonance (about 0.13uF) which is still barely LTR, but LTR nonetheless. His sparklengths are probably seeing benefits of running near resonance. This is a high energy coil at 32J. Cool!

Here's a Javatc output of the relevant data for reference
Take care,
Bart
*******************************************************
J A V A T C v.10 - CONSOLIDATED OUTPUT
Thursday, November 10, 2005 6:32:07 PM

Units = Inches

----------------------------------------------------
Surrounding Inputs:
100 = Ground Plane Radius

----------------------------------------------------
Secondary Coil Inputs:
Current Profile = G.PROFILE_LOADED
7.25 = Radius 1
7.25 = Radius 2
40 = Height 1
88.5 = Height 2
1000 = Turns
18 = Wire Awg

----------------------------------------------------
Primary Coil Inputs:
8.75 = Radius 1
14 = Radius 2
40 = Height 1
40 = Height 2
6 = Turns
0.375 = Wire Diameter
0.157 = Primary Cap (uF)
0 = Desired Coupling (k)

----------------------------------------------------
Top Load Object Inputs (dimensions & topload or ground connection):

Toroid #1: minor=6, major=40, height=106.5, topload
Toroid #2: minor=2.5, major=15.5, height=88.75, topload

----------------------------------------------------
Secondary Outputs:
72.43 [kHz] = Secondary Resonant Frequency
90 [deg°] = Angle of Secondary
48.5 [inch] = Length of Winding
20.6 = Turns Per inch
0.0082 [inch] = Space Between Turns (edge to edge)
3796.1 [ft] = Length of Wire
3.34 = H/D Aspect Ratio
24.24 [ohms] = DC Resistance
42317 [ohms] = Reactance at Resonance
43031 [ohms] = Forward Transfer Impedance
18.66 [lbs] = Weight of Wire
92.986 [mH] = Les-Effective Series Inductance
91.019 [mH] = Lee-Equivalent Energy Inductance
96.451 [mH] = Ldc-Low Frequency Inductance
51.926 [pF] = Ces-Effective Shunt Capacitance
49.155 [pF] = Cee-Equivalent Energy Capacitance
90.228 [pF] = Cdc-Low Frequency Capacitance
11.27 [mils] = Skin Depth
36.812 [pF] = Topload Effective Capacitance
96.3 [ohms] = Effective AC Resistance
439 = Q

----------------------------------------------------
Primary Outputs:
72.42 [kHz] = Primary Resonant Frequency
0.01 [%] = Percent Detuned
0 [deg°] = Angle of Primary
35.74 [ft] = Length of Wire
0.5 [inch] = Average spacing between turns (edge to edge)
1.5 [inch] = Primary to Secondary Clearance
30.763 [uH] = Ldc-Low Frequency Inductance
315.831 [uH] = Lm-Mutual Inductance
0.183 [k] = Coupling Coefficient
5.46 = Number of half cycles for energy transfer at K
36.93 [uS] = Time for total energy transfer (ideal quench time)

----------------------------------------------------
Transformer Inputs:
240 [volts] = Transformer Rated Input Voltage
14400 [volts] = Transformer Rated Output Voltage
694 [mA] = Transformer Rated Output Current
60 [Hz] = Mains Frequency
240 [volts] = Transformer Applied Voltage

----------------------------------------------------
Transformer Outputs:
9994 [volt*amps] = Rated Transformer VA
20749 [ohms] = Transformer Impedence
14400 [rms volts] = Effective Output Voltage
41.6 [rms amps] = Effective Input Current
9994 [volt*amps] = Effective Input VA
0.1278 [uF] = Resonant Cap Size
0.1918 [uF] = Static gap LTR Cap Size
0.3333 [uF] = SRSG LTR Cap Size
460 [uF] = Power Factor Cap Size
20362 [peak volts] = Voltage Across Cap
71978 [peak volts] = Recommended Cap Voltage Rating
32.55 [joules] = Primary Cap Energy
1454.6 [peak amps] = Primary Instantaneous Current
153 [inch] = Spark Length (JF equation using Resonance Research Corp. factors)

Tesla list wrote:

Original poster: "David Rieben" <drieben@xxxxxxxxxxxxxxx>

Bart,

So you think that that massive salt water cap bank is
only around .1 uFd? Maybe it's around .8 to 1 nFd per bottle then. I can't quite remember what the ave-
rage capacitance per bottle is, can anyone refresh my
memory on those figures? Note that these appear to be 750 ml wine bottles too, not 12 oz Corona beer
bottles - approximate twice the liquid volume capacity
with the wine bottles over the beer bottles. I'll try to
contact him back again and see if I can get more info
from him about his secondary coil, primary coil, and
toroid dimensions. Another thing that I noted was the
long trnsmission lines from the power supply/capaci-
tor bank assembly to the coil in its outdoor firing po-
sition. This looks like another source for loses in ad-
dition to the lossy salt water caps.
He did say that he was using just plain table salt for
the brine solution of his bottle caps after previously
using Epsom salts. The Epsom salts solution woud
freeze in the harsh Maine winter conditions but the table salt brine has never frozen on him. He has had
these wine bottle caps with the table salt solution for
four years now.

David Rieben


----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Wednesday, November 09, 2005 9:36 PM
Subject: [Fwd: Re: PFC Question]


Original poster: Terry Fritz <terry-cpu4@xxxxxxxxxxxxxxxxxxxxxxx>

Hi David,
Well, those were just some of my thoughts on the subject. I got your pics. They are certainly impressive. Even more impressive was the wine bottle cap bank! I can't imagine moving the cap bank around (but I did notice wheels?). He is certainly running a high C, but I don't think 0.3uF is accurate. Likely, it's about 0.1uF. Note it is also very lossy due to the salty caps. If you could get sec and pri coil data from him, I can certainly verify his actual capacitance.
This is "the best" bottle capacitor setup I've seen! It's completely "garage coiler" to the nth degree, and that makes it even more impressive (at least to me). Please send my KUDO's to this coiler!
Take care,
Bart
Tesla list wrote:

Original poster: "David Rieben" <drieben@xxxxxxxxxxxxxxx>

Bart,

That's a very well worded explanation of the STR
cap use for pig systems and I couldn't have explained
it that well myself :^) I have ran into a fellow coiler in
Maine via email that's running 120 wine bottle salt
water caps for his pig powered coil, though! I'm not sure
what the total C of that would be but even at 3 nFd
per 750 ml bottle as a conservative "guestimate", that would be
a whopping .36 uFd! He is also running a SRSG with it so this
would kind of dictate LTR for maximum efficiency. And the
amazing thing is that his SRSG is basically one of the
Terry Blake "propeller" style with what looks like
maybe 1/2" stailees steel "acron" cap nuts to take the brunt
of the dischagre energy and this is in sereis with an RQ
style stationary gap. He's ran this at over 20 kVA
and obviously the acorn nuts take one heck of a beating
in a pretty short order but he says that the nuts are
easily changable. I would have hard time believing
that he could run under these parameters but he sent
me some pics of his setup with the 120 wine bottles
and all and some estimated 12 to 15 foot discharge
photos as well. I can't send them to the Tesla list
since it won't accept attachments but if anyone would
be interested in seeing them I supose I could send
them directly to Terry and let him load them to hot
streamer_? BTW, dosen't Kevin Eldrege's BIGGG
coil use an SRSG as opposed to asynch? I also
remember that his primary C was around .17 uFd.
Quite large, but still not LTR for his monsterous
system.

David Rieben