Kapanadze Cousin - DALLY FREE ENERGY

[itsu]

I would like to see your scopeshots of voltage between the ground and sources of your MOSFETs as well as the voltage on the power supply pins of the TL494 IC (measured from the same ground point).
Ideally the scope should show pure DC.

Verpies,

i am presently uploading a video about a new build (experimental PCB) generator.
I did severall measurements there, but not the ones you request (found out afterwards that my secondary seems shorted, so not sure they are valid).

The video will be ready in half an hour, and i will make your requested tests tonight.

By the way, "voltage between the ground and sources of your MOSFET" as the sources are connected to ground (well sort of as i have inserted 0.47 Ohm current sensor resistors) is that usefull?

Regards  Itsu

[itsu]

@All,


After rebuilding my main generator on an experimenter PCB, i did some measurements again, showing mixed results.
The "current" looks OK to me, but the drain/output voltages still look spiky, however, at the end i found that i probably have a shorted secondary (220V side) on the used toroid.
Not sure if this renders these measurements useless, so perhaps kind of off topic, but i thought i put it up anyway


I agree with "Hoppy" that the used green toroid probably is a commercial one, so i also followed that route.
I have a small one on order, so for the time being will continue working on the nano pulser.

Video to be seen here: http://www.youtube.com/watch?v=YZQT8mN0AtE

Thanks for your comments,  regards Itsu.

[Hoppy]

@All,


After rebuilding my main generator on an experimenter PCB, i did some measurements again, showing mixed results.
The "current" looks OK to me, but the drain/output voltages still look spiky, however, at the end i found that i probably have a shorted secondary (220V side) on the used toroid.
Not sure if this renders these measurements useless, so perhaps kind of off topic, but i thought i put it up anyway


I agree with "Hoppy" that the used green toroid probably is a commercial one, so i also followed that route.
I have a small one on order, so for the time being will continue working on the nano pulser.

Video to be seen here: http://www.youtube.com/watch?v=YZQT8mN0AtE

Thanks for your comments,  regards Itsu.

Itsu,

The R & C timing components 10K & 1uF (1000nF) on the schematic should be providing an oscillation of around 100Hz if you look at the TL494 product graph. Your timing cap may be to low - what value are you using as it appears to be around 10nF for a 4700Hz output? The Dally inverter as I see it is primarily a low frequency (around 50Hz) 150V PSU., thus the iron cored transformer.

Regards
Hoppy

[itsu]

Hoppy,

the Dally generator to my understanding provides 2 functions, 1 as you said a 150/200V PSU for driving the nano pulser, but 2 to drive the L1 coil with around 4.6Khz square wave pulses at this 150/200V (supposedly the double of the 2.3Khz at which hydrogen atoms spin??!!)

So therefor the generator needs to run at around 4.6Khz, and not 100/50Hz.

Correct me if i am wrong.

Regards  Itsu.

[Vortex1]

Itsu

I assume the mains transformer you are using (in reverse) is probably not a ferrite core, rather it is a iron alloy tapewound. As such it was probably ok at 50 to 60 Hz, but may have significant core loss (eddy current) at 4.6kHz.

Most transformers used in these TL494 and equiv. circuits use ferrite cores to allow high frequency power transfer without significant core loss. Also excess interwinding capacitance coupling is probably causing some nuisance spikes to appear, as this would not be so noticeable at 50 /60 Hz.

You may get better results using ferrite transformers used in the power supply from old video monitors or PC computers or wind your own.

Your Zeners are burning out because it is a push pull arrangement, and as such the not driven winding will see a voltage 2X the supply voltage when the opposite winding is switched to ground. If the Zeners are not rated at least 2X the supply voltage, they can start to absorb energy.

The Zeners should not be required if you use a good ferrite transformer wound for low leakage inductance, and by all means keep a reasonable load on the secondary so that it can help damp any primary spiking.

55 kOhms may be too high (0.88 Watts @220V). A more reasonable load to help damp the primary would be in the 5 watt range like 10 kOhm.

Thanks for sharing your work.