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Re: doing something right??
Original poster: "Gerry Reynolds" <gerryreynolds-at-earthlink-dot-net>
Hi John,
These are my coil parameters using JAVATC. I will intersperse some comments
worth noting:
J A V A T C v.10 - CONSOLIDATED OUTPUT
Friday, November 21, 2003 10:53:52 PM
Units = inches
----------------------------------------------------------------------------
----Surroundings:
120 = Ground Plane Radius
120 = Wall Radius
120 = Wall Height
120 = Ceiling Radius
120 = Ceiling Height
Note: this was not my actual environment
----------------------------------------------------------------------------
----Secondary Coil:
Current Profile = G.PROFILE_LOADED
1.75 = Radius 1
1.75 = Radius 2
20 = Height 1
38 = Height 2
1523 = Turns
30 = Wire Awg
----------------------------------------------------------------------------
----Primary Coil:
4 = Radius 1
7.797 = Radius 2
20 = Height 1
22.193 = Height 2
8.78 = Turns
0.25 = Wire Diameter
0.0194 = Primary Cap (uF)
0 = Desired Coupling (k)
My actual optimum primary turns is 10 (in the kitchen, I did not have the 10
foot spacing from the walls.
----------------------------------------------------------------------------
----
Top Load Objects (dimensions & connection):
Toroid #1: minor=3, major=11, height=42, topload
----------------------------------------------------------------------------
----Secondary Outputs:
218.06 [kHz] = Secondary Resonant Frequency
90 [deg°] = Angle of Secondary
84.6 = Turns Per inch
0.00179 [inch] = Space Between Turns (edge to edge)
20 [awg] = Recommended Wire Size
1395.5 [ft] = Length of Wire
5.14 = H/D Aspect Ratio
144.04 [ohms] = DC Resistance
45988 [ohms] = Reactance at Resonance
0.42 [lbs] = Weight of Wire
33.565 [mH] = Les-Effective Series Inductance
31.517 [mH] = Lee-Equivalent Energy Inductance
36.874 [mH] = Ldc-Low Frequency Inductance
15.871 [pF] = Ces-Effective Shunt Capacitance
14.577 [pF] = Cee-Equivalent Energy Capacitance
24.765 [pF] = Cdc-Low Frequency Capacitance
5.564 [mils] = Skin Depth
10.641 [pF] = Topload Effective Capacitance
----------------------------------------------------------------------------
----Primary Outputs:
218.06 [kHz] = Primary Resonant Frequency
0 [%] = Percent Detuned
30 [deg°] = Angle of Primary
27.113 [ft] = Length of Wire
0.25 [inch] = Average spacing between turns (edge to edge)
2.25 [inch] = Primary to Secondary Clearance
27.573 [uH] = Ldc-Low Frequency Inductance
127.053 [uH] = Lm-Mutual Inductance
0.126 [k] = Coupling Coefficient
7.94 = Number of half cycles for energy transfer at K
18.02 [uS] = Time for total energy transfer (ideal quench time)
----------------------------------------------------------------------------
----Transformer Inputs:
120 [volts] = Transformer Rated Input Voltage
6250 [volts] = Transformer Rated Output Voltage (measured Voc)
30 [mA] = Transformer Rated Output Current (measured Isc)
60 [Hz] = Mains Frequency
120 [volts] = Transformer Applied Voltage
0 [amps] = Transformer Ballast Current
----------------------------------------------------------------------------
----Transformer Outputs:
188 [watts] = Rated Transformer Power (probably should be VA
rating)
208333 [ohms] = Transformer Impedence
6250 [volts] = Effective Output Voltage
1.6 [amps] = Effective Input Current
188 [watts] = Effective Input Power
0.013 [uF] = Resonant Cap Size
0.033 [uF] = LTR Cap Size (based on 120 bps)
35 [uF] = Power Factor Cap Size
8838 [volts] = Peak Voltage Across Cap
31241 [volts] = Recommended Cap Voltage Rating (not for MMC)
0.76 [joules] = Primary Cap Energy
234.4 [amps] = Primary Instantaneous Current
19.8 [inch] = Spark Length (JF equation using Resonance Research Corp.
factors)
----------------------------------------------------------------------------
----Rotary Spark Gap Inputs:
0 = Number of Stationary Gaps
0 = Number of Rotating Electrodes
0 [rpm] = Disc RPM
0 = Rotating Electrode Diameter
0 = Stationary Electrode Diameter
0 = Rotating Path Diameter
----------------------------------------------------------------------------
----Rotary Spark Gap Outputs:
= Presentations Per Revolution
[BPS] = Breaks Per Second
[mph] = Rotational Speed
[ms] = RSG Firing Rate
[ms] = Time for Capacitor to Fully Charge
= Time Constant at Gap Conduction
[ms] = Electrode Mechanical Dwell Time
[%] = Percent Cap Charged at Gap Conduction
[volts] = Effective Cap Voltage
[joules] = Effective Cap Energy
[volts] = Terminal Voltage
[joule*seconds] = Cap Energy per Second
[inch] = RSG Spark Length
----------------------------------------------------------------------------
----Static Spark Gap Inputs:
6 = Number of Electrodes
0.625 [inch] = Electrode Diameter
0.115 [inch] = Total Gap Spacing
----------------------------------------------------------------------------
----Static Spark Gap Outputs:
0.023 [inch] = Gap Spacing Between Each Electrode
8838 [volts] = Charging Voltage
7772 [volts] = Arc Voltage
Note the actual arc voltage was probably around 9000 (safety gap was firing
occasionally). Since i was using a LTR cap, there was some resonance
effect that JAVATC does not yet take into account. LTR being pi/2 * Cres,
the BPS should be around 120 (see Terry Fritz's derivation for static gaps).
Since the safety gap was firing, the joules per bang should reflect full
charging and be a little higher than the .59 indicated below. I calculated
about 90 watts from the cap (1.7 sqrt(90watts) is about 16 inches about
where I was when I took a hit on my NOSE (wish I had a picture of that).
87.9 [%] = Percent Cap Charged at Gap Conduction
20.208 [ms] = Time for Cap to Fully Charge
17.772 [ms] = Time for Cap to Charge to Arc Voltage
56 [BPS] = Breaks Per Second
0.59 [joules] = Effective Cap Energy
283540 [volts] = Terminal Voltage
33 [joule*seconds] = Cap Energy per Second (I think this should be joule
per second or watts)
20.1 [inch] = Static Gap Spark Length
> Original poster: "John H. Couture" <couturejh-at-mgte-dot-com>
>
>
> Gerry -
>
> I am doing similar tests with 5 different TC configurations and half of a
> 15KV/30 ma NST. The secondaries are 2 to 4 inches diam. I am using a
> voltmeter, ammeter, and wattmeter for the input. One random spark was 16
> inches. The controlled sparks at total 120 watts or one joule per break
are
> 6 to 10 inches. Some of the power factors are very low. Are you using a
> wattmeter?
>
> Could you list your TC parameters so I can run them on the JHCTES program?
>
> John Couture
>