Solid States Devices > TPU builders
Deciphering the TPU in 2008
eldarion:
All,
I have recently resumed testing of Bob's coil, thanks to some new information I had received. Apparently, this type of system will not work properly without high voltage pulses--all of my previous test had been with low-voltage pulses.
While I have not yet achieved overunity, I figured I should resume an experimental log here, in the hopes that one of you might be able to help get this coil to maintain catalyst (yes, I think I have catalyst, but it drops right out, usually in less than 10us).
I am using Bob's coil, wound exactly as specified with three primaries at 120-degrees, and one secondary coil wound over all. I am not using any of the potential or magnetic biases at this point, simply because they still do not appear to have any effect.
The coil is driven, under microprocessor and FPGA control, with 100ns wide 150V negative-going pulses. The falltime on these pulses is very fast; under 10ns. Risetime is obviously limited by the inductance of the primary coil. For these tests, I am driving all three coils nearly in phase, but with about 200ns of delay from A to B and B to C. The repetition rate of that sequence is 100KHz. All of these parameters are fully adjustable; I am just using these particular values for theses tests.
I have attached what I believe to be the kick, or several kicks strung together--this is what I call "catalyst". I have never before seen a DC offset like this across the secondary coil! The coil only reaches catalyst stage some of the time (quite rarely and unpredictably), and the exact mechanism that causes catalyst is still unknown, as is how to maintain it. The schematic is exactly what I have connected to the secondary, then the 10:1 scope probe connects across R1. The green trace is a disconnected 1:1 probe that I have sitting in an partially enclosed metal box about 12" away from the coil. Lots of hash once catalyst is reached!
If anyone here can offer suggestions on how to both initiate and maintain this stage of operation I would be most grateful.
Thanks!
Eldarion
P.S. Please keep this information off of the public boards for the time being. When we have a working system, I have registered toroidalpower.org and toroidalpower.com and we can use those sites to put up full, GPLed instructions, hardware, and software.
Bruce_TPU:
Hi Eldarion,
Great job! It is very encouraging, seeing DC offset.
Hello All,
My suggestions (below) for maintaining the "catalyst" as per my email to Eldarion, submitted to all of you for input also and ideas.
1. I think the RF, feedback, noise, whatever is destroying your input waveforms, has to
go away. Since your controller does not fit into the center of the iron powder toroid, I
would suggest two things.
a. Using shielded coax from the controller to the toroid
b. Placing your controller a minimum of 6 feet away from the toroid.
This is what SM said about this problem:
1. "REMEMBER, all of that noise and hash in your solid state amplifier is in the
output signal !
Now tell me? What do you think is happening inside the extremely sensitive torrid
generator
when you use solid state devices to attempt to create the required precise control
frequencies to make catalyst and produce power???
By the way, your Solid State amplifier generates so much noise that if you measure the
mains wiring you can see noise from YOUR amplifier actually getting back through the
transformer and into the mains input wiring!!!
understand what perfect frequency is."
2. "When you design an amplifier you try to isolate noise, or hash from the mains
power supply from getting into the B+ and contaminating the output signal, etc.
You can measure all kinds of noise from the mains in your B+ not to mention all the noisy
spikes from the solid state rectifiers giving the direct current to the power capacitors.
All of this is easily measured, or seen on a scope of most solid state audio amplifiers.
NOW design and make a good tube amplifier and you will immediately find a dramatic
difference in the B+ supply measurements and what you can see on the scope.
No more spikes from the solid state rectifiers, almost no hash from the mains power
coming in!"
I am not saying to rebuild the controller, I am saying that SM was explicit that that noise on your
output signal is preventing the catalyst from continuing.
I would also suggest using a battery for your supply, and experimenting outside, far from
any mains or overhead wires.
Next, I would suggest forgetting the HV potential bias on Bob's Coil (for now) and using
the axially wound magnetic bias, with at least an amp or so on it. Also, do not forget
to scope the inner windings and the pancake winding's on the top and bottom of the core
to see what you can see. Jason also suggested the Mag bias to help keep it in catalyst.
Progress, progress, ;) :D ;D
Bruce
hartiberlin:
@eldarion,
welldone.
Can you please show a few pictures of your setup with the coils
and also some scope shots of the driver pulses ?
What are the green scope shots ?
Is this the output from the collector coil ?
Many thanks.
BEP:
@Eldarion,
I think you are correct about catalyst. If your effect is similar to my experiments your coils are struggling to gather something to spin.
I haven't had time to read the history here yet but try placing the noisiest part of your controls either in the center or centerline above or below the coils. I'm assuming you have heat sinks and other such surfaces charged with heat or electrostatics on that control. If so, they should be near the center.
If it doesn't work below then try above.
Even then, from what I've read so far, the operating frequencies won't allow a profound result but it should be better and hopefully stable.
This will prove whether your results are related to the problems I have been facing.
eldarion:
--- Quote from: hartiberlin on May 15, 2008, 02:40:35 AM ---@eldarion,
welldone.
Can you please show a few pictures of your setup with the coils
and also some scope shots of the driver pulses ?
What are the green scope shots ?
Is this the output from the collector coil ?
Many thanks.
--- End quote ---
Hi Stefan,
I have attached a tiny panoramic picture of my TPU setup so far. The green scope trace is from a disconnected probe laying in that metal box you see in the picture--it is an indicator of the large amount of RF noise when the coil enters catalyst.
Yes, the black trace is the output of the collector coil.
I will see if I can get some scope shots of the drive signals as well, but they will just look like Bob's picture. ;D
Eldarion
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