Successful TPU-ECD replication !

[z_p_e]

I've taken a stab at simulating the circuit as I posted earlier, with the 3 bifilar coils, and 3 switches.

A single frequency f1 at 40kHz was used, and the results are shown in the pdf.

Notice the component I added at the output? Look at the waveforms in Otto's and Roberto's pdf, and perhaps you'll see why I did this.

Did they use this component also, as there would certainly be portions of the waveforms below the 0 line as well?

Also notice the "artifact" in between the bemf pulses?

Cheers,
Darren

PS. Although it is stated in their pdf that 40kHz was used, it appears to be closer to 55kHz.

[chrisC]

I've taken a stab at simulating the circuit as I posted earlier, with the 3 bifilar coils, and 3 switches.

A single frequency f1 at 40kHz was used, and the results are shown in the pdf.

Notice the component I added at the output? Look at the waveforms in Otto's and Roberto's pdf, and perhaps you'll see why I did this.

Did they use this component also, as there would certainly be portions of the waveforms below the 0 line as well?

Also notice the "artifact" in between the bemf pulses?

Cheers,
Darren

PS. Although it is stated in their pdf that 40kHz was used, it appears to be closer to 55kHz.

Hi Darren:

Thanks for the simulation results. Is it SPICE?
Anyway, the last Otto post did state that his new simulatioi is based on 55 KHz. (see below)

Chris

Hello all,

Im 4 days at home. Must not go to work. So Im playing with coils.

Today I wanted to know how many turns should have my primary coil of my little transformer. I did a loooot of tests. I spent a lot of hours, cutted my primary coil, measured....result NOTHING!!!!!

The point is: THE DIAMETER AND THE LENGHT OF THE PRIMARY COIL IS NOT IMPORTANT!!!!!

First I had a 12m long coil and pulsed this coil. Signals fine....then shorter and shorter and then I saw it: at a frequency between 50 kHz and 60 kHz I could clearly see SINE WAVES!!!!! This happens at 12m or 2m lenghtof my coil.

Yes, I know what Im wrighting. The lenght and diameter is NOT important. To see sine waves the frequency is important.

This sine waves I saw with a 0,5mm diameter coil even less then 2m long!!! Just 1 frequency and a wire. But I have to say that everything is connected like in a TPU: I have the Mobius and my pulsed MOSFET is on a copper plate arround 5 x 3 cm in dimensions and 1cm thick. Of course I can also see the seeds. They are so little that my scope is in the range of 200mV. Then I can see the seeds.

Dont ask for a picture because my camera is "out of house". The seeds and the sines are the same as in the pdf. Oh, no, not the same because I have no secondary coil. The sines are arround 10 - 15V.
Now, Its clear why we need a secondary coil, or to say it better, why we need a little transformer in our TPU:

In the primary  at 50 - 60kHz sine waves are created and the secondary coil is an amplifier.

Just look at the open TPU. Try to see how many red wired windings you can see.

Otto

[Jdo300]

Hello All,

Just dropping by to pass on a quick update. I spent most of Saturday evening planning out and building the MOSFET box to connect to my TPUs. It is setup with three BNC and banana jack signal inputs with switches to connect or disconnect each channel independently. The output of the circuit will come out of some white terminal blocks and also some banana jacks on the other side of the box. The MOSFETs will be mounted in sockets on top of the box for easy replacement.

I attached a photo of what I have so far. I just took the time to solder most of the wires onto the jacks and things but still have to make all the connections so it looks a mess  . More to come soon.

God Bless,
Jason O

[ronotte]

Hi all,

finally, not going to sea-side with my family, I succeed in re building the ECD. What you see is a firstpi with a new subassebly containing driver & power MOSFET in order to limit the emitted radiation. The second pic is the ECD unit with only flat-type coils  (is a deviation from Otto' setup...but I wanted to test).

You can appreciate the partial sinus reconstruction. The pieces are juxtapposing each other. The peaks left simply have not been converted for my choose.

I do confirm that is the Seed that stars the conversion process. Each of the RE peaks are converted one by one as the Seed cover them.

I do confirm that the Seed is moved by the lower freq. The higher freq controls the conversion amplitude.

The test were done  so:

+ 8V PS
2 freq in 40-60KHz range
1 transormer only
60W load.
The waveform are probed on PHASE point

Roberto

P.S. I've done also a live footage...but for the moment I can upload as I don't found the correct cable!!

[giantkiller]

Excellant mechanical technique, Roberto.
Sleek and to the point. I see you used the teardrop shape to combat the short plastic tubing from folding. I duct taped the ends and wrapped mine around 4 in pvc. Then held it over the electric stove burner. This let me make a complete loop. But your way is better. I also see you went to an even higher gauge wire for your primary for less turns while maintaining mass equivalency. This should exclude some complexity for those wanting to build.
And thanks for the fet driver pic. I see you soldered the coil wire ends in place too. Single layer coils and not bobbin type multi layer windings.

You let the cat out of the bag with this one. There are a ton of short cuts and high exposure of low complexity.
You also show use of low level thermal tubing. Hmmm...

Attached is my latest. Single layer windings, mass equivalent,  low thermal tubing, lamp wire horizontal loops

Keep on truckin' or movimento persistant!

--giantkiller.