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Overunity Machines Forum



Eldarion's FPGA-based TPU controller

Started by eldarion, July 29, 2007, 11:24:39 PM

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eldarion

#5
September 06, 2007, 04:23:27 PM
Well, I thought I'd give an update since it has been a while...

I got the regulated HVDC supply working!  It wobbles a bit (+/- 0.5V at 40V) but other than that it looks good.  I may try to tune it better if the wobble becomes an issue.

Attached is a pic of the custom circuitry and a shot of the voltage selection screen and cable hookups.  You will notice a little "VLOW" on the LCD; I am building in self-diagnostics.  This particular message is telling me that I forgot to hook up the external power supply... ;D

Still to do is the TPU control loop.  Also, I am finding the LCD screen rather cramped, so I will probably display more information on an external VGA monitor.  No extra hardware is required (other than an old monitor), so I figure why not? ;)

Eldarion
"The harder the conflict, the more glorious the triumph. What we obtain too cheaply, we esteem too lightly; it is dearness only that gives everything its value."
-- Thomas Paine

eldarion

#6
September 14, 2007, 03:30:48 PM
Well, I thought I should post an update before the conference.  It sure is tricky to take a picture of a CRT monitor!

Not everything is actually working (notably the "CONTROL>" prompt), but everything in the "System Status" window is fully functional.

I can use either the small built-in LCD screen and the rotary encoder or a VGA monitor and a PS2 keyboard to control this thing.  I really like being able to see all the parameters at once! ;D

One of the next things that I will do is implement an automatic resonance sweep and try to plot the results on the VGA screen.  That way, we can determine resonant peaks of the attached coils easily (and the software can auto-tune a new coil more easily!)

Best of all, since I am not adding any extra hardware, power draw is minimal for the whole setup (if you don't count the CRT power drain ::)  But then we don't really need that for automated control...just for initial calibration and setup.)

If anyone wants a .bit file to download to their board, just post here and I will post the latest version for you.

Eldarion
"The harder the conflict, the more glorious the triumph. What we obtain too cheaply, we esteem too lightly; it is dearness only that gives everything its value."
-- Thomas Paine

eldarion

#7
September 28, 2007, 05:30:15 PM
Well, I have finally gotten around to drawing up the schematic--this is what I have so far on the main board; I have not yet calculated or built the voltage division networks for the add-on ADC modules.

Also, I have attached a screenshot of what I believe is the final GUI revision of the controller.  Once again I apologise for the dismal quality of the picture; it is nearly impossible to take a picture of a CRT monitor and have it turn out correctly.

As you can see, I have built this controller to handle either one or two coils simultaneously.  If an out of spec condition is encountered, a fault will be triggered and that coil will shut completely down temporarily.  If a coil's ADC is not plugged in, the contoller will also shut down the pulse generator for that coil and signal a fault (NOT INSTALLED message on the second pane)

As always, a bitstream is available for those who want it.  I do ask that both the schematics and the bit file remain confidential to the group; from what I can see this controller may be a significant step forward from previous versions and I haven't yet decided what I want to do with it.  A copy of the software will always be available to the group's members for free, however!!! ;D

Tim
"The harder the conflict, the more glorious the triumph. What we obtain too cheaply, we esteem too lightly; it is dearness only that gives everything its value."
-- Thomas Paine

Bruce_TPU

#8
September 28, 2007, 11:29:39 PM
Hey Eldarion,

The control screen looks awesome!  The screen provides instant analysis of everything going on.  Also, the self diagnostics and fail safes are vital for safe operation.  The name "Thor" is fitting for this controller indeed.  I look forward to watching you fire the new coil up next week! 

May you have only Thor's thunder, and never the lightning!   ;)

Bruce
1.  Lindsay's Stack TPU Posted Picture.  All Wound CCW  Collectors three turns and HORIZONTAL, not vertical.

2.  3 Tube amps, sending three frequency's, each having two signals, one in-phase & one inverted 180 deg, opposing signals in each collector (via control wires). 

3.  Collector is Magnetic Loop Antenna, made of lamp chord wire, wound flat.  Inside loop is antenna, outside loop is for output.  First collector is tuned via tuned tank, to the fundamental.  Second collector is tuned tank to the second harmonic (component).  Third collector is tuned tank to the third harmonic (component)  Frequency is determined by taking the circumference frequency, reducing the size by .88 inches.  Divide this frequency by 1000, and you have your second harmonic.  Divide this by 2 and you have your fundamental.  Multiply that by 3 and you have your third harmonic component.  Tune the collectors to each of these.  Input the fundamental and two modulation frequencies, made to create replicas of the fundamental, second harmonic and the third.

4.  The three frequency's circulating in the collectors, both in phase and inverted, begin to create hundreds of thousands of created frequency's, via intermodulation, that subtract to the fundamental and its harmonics.  This is called "Catalyst".

5.  The three AC PURE sine signals, travel through the amplification stage, Nonlinear, producing the second harmonic and third.  (distortion)

6.  These signals then travel the control coils, are rectified by a full wave bridge, and then sent into the output outer loop as all positive pulsed DC.  This then becomes the output and "collects" the current.

P.S.  The Kicks are harmonic distortion with passive intermodulation.  Can't see it without a spectrum analyzer, normally unless trained to see it on a scope.

eldarion

#9
September 29, 2007, 08:03:47 PM
Quote from: btentzer on September 28, 2007, 11:29:39 PM
Hey Eldarion,

The control screen looks awesome!  The screen provides instant analysis of everything going on.  Also, the self diagnostics and fail safes are vital for safe operation.  The name "Thor" is fitting for this controller indeed.  I look forward to watching you fire the new coil up next week! 

May you have only Thor's thunder, and never the lightning!   ;)

Bruce

Thanks!  I'd prefer not to have thunder in my basement either--that would mean something blew up! :D

Attatched is the finished schematic of Thor.  The only reason that this would be modified is if something is wrong when I actually hook up the coil.

I'll see if I can get a better screenshot sometime in the future...

Eldarion
"The harder the conflict, the more glorious the triumph. What we obtain too cheaply, we esteem too lightly; it is dearness only that gives everything its value."
-- Thomas Paine
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