From: "Terrell W. Fritz"
Date: Mon, 07 Oct 2002 19:49:44 -0600
Subject: [TSSP] Curiouser and curiouser!
Hi All,
I tested my OLTC again tonight with the pinger and just with the normal firing
circuit (no breakout).
Pinger
Starting work on peak 6: 274.048 kHz Q=384.654
Q F P corrX corrP corrM err
P 25.946 273301 -1.022 +0.981729 +0.498 0.985397 51.1%
PK FREQ kHz (Error +/-) Q FACTOR (Error +/-) LEVEL
1 37.229 (0.01%,3Hz) 84.19 (0.09%, 0.1) -0.4dB
2 113.864 (0.01%,8Hz) 46.26 (0.70%, 0.3) -12.3dB
3 172.448 (0.01%,12Hz) 34.37 (2.79%, 1.0) -17.0dB
4 223.862 (0.01%,16Hz) 29.69 (11.17%, 3.3) -20.3dB
5 273.388 (0.01%,19Hz) 25.94 (18.78%, 4.9) -24.1dB
6 273.391 (0.01%,19Hz) 26.01 (18.78%, 4.9) -24.0dB
Accounted for 99.33% of input signal
Running Coil
Starting work on peak 6: 122.681 kHz Q=186.548
Q F P corrX corrP corrM err
P 7.407 119610 -0.097 +0.974713 +0.664 0.995348 35.2%
PK FREQ kHz (Error +/-) Q FACTOR (Error +/-) LEVEL
1 37.148 (0.01%,2Hz) 83.73 (0.49%, 0.4) 0.0dB
2 114.014 (0.01%,7Hz) 33.80 (22.33%, 7.5) -26.5dB
3 172.208 (0.01%,11Hz) 35.87 (7.90%, 2.8) -28.1dB
4 226.978 (0.01%,15Hz) 37.49 (18.78%, 7.0) -29.4dB
5 120.239 (0.01%,8Hz) 5.20 (100.00%, 5.2) -21.3dB
6 119.635 (0.01%,8Hz) 7.28 (18.78%, 1.4) -23.3dB
Accounted for 97.82% of input signal
The Q seems to have almost exactly doubled to 84 now!!!!!.... Of course, I am
not complaining ;-)) but I am thinking the sonotube picked up humidity
originally and is slowly drying out over time.
If I use Q = Xl / R I get 84 = 2 x pi x 37200 / R where R = 2782. However,
MicroSim says it is about 600 (series R). Maybe Q=Xl/R has been a bad equation
to be using and that is messing my models up some?? Anyone know what the Q is
of an L, Rl, C series circuit?
TCMA did not find PK5 in the normal running coil test above and PK2 was odd. I
think that may be due to the gap still conducting in one direction with the
IGBTS?
Cheers,
Terry
============ Old 9/11/2002 message (Top Voltage)
Hi All,
I have gotten some round brass spheres for the top of the OLTC. The sit on a
0.375 inch diameter brass rod on top of the coil. A current sensor is
connected to the rods base.
http://hot-streamer.com/temp/PaulArc/020911/P9110013.jpg
http://hot-streamer.com/temp/PaulArc/020911/P9110012.jpg
I have three spheres. Their diameter is (inches):
#1 0.981
#2 1.354
#3 1.833
http://hot-streamer.com/temp/PaulArc/020911/P9110014.jpg
The secondary coil's specs are:
LsecDC = 0.487H
#28 wire
10.75 inches diameter
Base height = 3.5 inches
Winding length = 41 inches
Toroid center 50 inches
Toroid 23.5 diameter 6.5 inch cord
Height of ball center above toroid center
#1 13.5
#2 13.7
#3 13.95
Rod diameter 0.375
I pinged the coil with the toroid and without:
PK FREQ kHz (Error +/-) Q FACTOR (Error +/-) LEVEL
1 37.801 (0.01%,5Hz) 42.94 (0.41%, 0.2) -0.3dB
2 113.550 (0.01%,16Hz) 19.45 (0.83%, 0.2) -13.5dB
3 171.773 (0.01%,24Hz) 14.32 (3.32%, 0.5) -19.2dB
Accounted for 99.36% of input signal
PK FREQ kHz (Error +/-) Q FACTOR (Error +/-) LEVEL
1 52.203 (0.02%,8Hz) 27.72 (13.28%, 3.7) -0.2dB
2 125.605 (0.02%,19Hz) 15.29 (1.97%, 0.3) -12.4dB
3 179.477 (0.02%,28Hz) 13.18 (5.58%, 0.7) -17.1dB
4 228.129 (0.02%,35Hz) 13.20 (9.39%, 1.2) -21.1dB
5 275.953 (0.02%,43Hz) 13.83 (13.28%, 1.8) -25.2dB
Accounted for 98.00% of input signal
I tried a little first test tonight and got the following base current wave
forms:
http://hot-streamer.com/temp/PaulArc/020911/S1.gif
http://hot-streamer.com/temp/PaulArc/020911/S2.gif
http://hot-streamer.com/temp/PaulArc/020911/S3.gif
So I think it is ready to go.
Cheers,
Terry
Maintainer Paul Nicholson, paul@abelian.demon.co.uk.