Capture Radiant Energy via Coils

[ronotte]

Carl,
I did the test you proposed: compare the Otto's collector coils connections vs simplr serial connections.
Result is that with serial connection you have spikes 5 -6 time bigger in amplitude...but not rot mag field.
In my case with Otto connection I've max 100V, with series connection about 650V.

Roberto

[starcruiser]

Roberto,

If we now add another frequency which is either higher or lower, we should get a rotating field again due to the hetrodyning effect.

I have not tried the TPU with 2 HV coils yet, only one, my next set of tests will use 2 HV coils.

The only issue I am facing with using these HV coils is that my scope cannot display the entire waveform! My scope can do (full deflection, highest setting) 200V/div 8 div, thus only 1600vp-p and my scope goes full screen when just measuring the feedback coil! under load I get it to drop to roughly 200vpp. I am still working on the spark gap design which will use a magnet to quench the spark. I also need to see if this will help with the unidirectional flow issue.

I have noticed though that if I place the spark gap after the collector coil the coil reduces the operating range (frequency) to the 3Khz area (this is based on a collector with 15 turns of 16AWG stranded wire). I had a wider range with the spark gap in the leadin to the coil. I am wondering how this will change with a single turn collector or just a change in the number of turns. humm....

What I like about this setup is the signal sources do not have to be sync'd since we want a difference in them. also the operating frequency so far is closer to SM's TPU.

More to test....

[ronotte]

Carl,
I'm very interested about your spark-gap tests, please let me know further results. For my side I'm preparing to do some tests of the same kind but by using a less dangerous method perhaps not so efficent!
I'm starting to build an arrangement that does use a 'shuttling capacitor' a-la-T.Bearden to provide the voltage discharge into TPU. In this way I should easily reach the 6 - 12 KHz needed for my 6" TPU all copper (in my case the sweet freq are: 6, 8 and 12 KHz) with a much less current supply!.
With Otto arrangement but also with all-serial wiring I'm able to glow bright red a 60 W/220V light bulb with a 10V @ 2 A supply, so the goal is to see if with electrolitic cap discharge will be possible to obtain a better conversion.
After that I'm preparing to build a new 4" TPU with another philosopy...it will be lighter ...no more than 80gm.
So at work!
Roberto

[ronotte]

Carl, here's how I intend to do
Roberto

[MeggerMan]

Hi Ronotte,
A TL494 can achieve most of this circuit (Osc, flip-flop, duty) except for the indivdual pulse width timing.
You could perhaps connect to a 555 in monostable mode.
Using descretes, perhaps an oscillator with a saw tooth output, 3 comparators, a flip-flop and a mosfet driver.
If you follow the schematic for the TL494 you could create a device from descretes but with two different duty cycles by using the ramp of the oscillator and a comparator.
Is there an advantage to be gained by pulse charging the cap?

Regards
Rob