Kapanadze Cousin - DALLY FREE ENERGY

[AlienGrey]

Hello,
What do you think this one, the prize is correct.
Juste add potentiomètre for frequency adjust.
https://fr.aliexpress.com/item/150W-Simple-TL494-Drive-Inverter-Booster-Circuit-Board-DC-12V-To-AC-220V-For-Students-Graduation/32702714554.html
Regards.

Bonsur MonsierX Have you tried a NE555 and two pots and 2 diodes for F and PW and an npn and pnp on the output ? or even a simple a signal generator just to get it going ?

AG

[NickZ]

   Itsu:
   Here's a few scope shots, the load is a couple of 100W bulbs. The device is running on 24v. And it likes to run best at 16.7MHz, or so. 
  The hot fet is the upper one on the scope shots, the lower ones stays fairly cool.
   I also switched the fets around to see if it's the fets that are messing up, but the right side mosfet is the hot one, even after switching them around. So, it's not the fets failing, but perhaps something else.
   Sorry for the blurry pics, I'll do better next time. Just let me know what you want me to focus on.

[itsu]

Nick,

thanks, i guess you mean 16.7KHz, not Mhz.

Blurry pics indeed, but it shows you have 2 different drain signals, the upper (hotter) one has a spike followed by low amplitude ringing, while the lower one has just the ringing, but
with higher amplitude. (or did you not have the vertical setting (amplitude) the same on both channels??)

The expanded pics shows the ringing nicely, but to calculate the frequency of this ringing, i need to know the time base setting (5us/div.??)
If it is 5us/div., then i measure about 9us between two tops of the lower trace in the expanded screenshot, meaning a frequency of about 111Khz

That 111Khz seems very low to me, so i really need to know the time base setting of the scope during that expanded screenshot.

Try to give with each screenshot the settings of the scope (time base and vertical settings of both channels) and the probe (x1 or x10).

I have no idea why your drain signals look different (why one has a spike and the other not) but for me it points to some asymmetry in the system (yoke).

Try to give the above requested data,  thanks.


Itsu

[AlienGrey]

   Itsu:
   Here's a few scope shots, the load is a couple of 100W bulbs. The device is running on 24v. And it likes to run best at 16.7MHz, or so. 
  The hot fet is the upper one on the scope shots, the lower ones stays fairly cool.
   I also switched the fets around to see if it's the fets that are messing up, but the right side mosfet is the hot one, even after switching them around. So, it's not the fets failing, but perhaps something else.
   Sorry for the blurry pics, I'll do better next time. Just let me know what you want me to focus on.

|Nick Z Re your scope shot of both channels !   if you look at the image on your shot the one wave backs up onto your 2nd wave form showing an over lap !  can I suggest you check your resistors on the TL494 to ground are both the same ! and any capacitors you have between the MOS FET driver inputs and zero volts are the same value and any resistors from your TL494 to your drivers are also the same ! CHECK THEM WITH A METER IF NESASARY as this could and will cause a time delay mismatch in one or both phases ! as the driver input impedance of them is high and if you don't take care and pay attention this kind of problem will arise, Re Itsu's observation comments, as that would account for the loss of one overshoot and over heating is shown up on your scope shot!

PS tip! from T1000 that works, why don't you bi-filar wind the 2 primaries, this would limit the overshoot and feed energy back into the system saving wasted energy considerably?

Regards AG

[stivep]

Regards questions  about my translations of mostly Russian achievement in FE:

I just finished assembly of my video editing portion of the lab .
I hope I will be able to find more time  for  translations of interesting material to all of us.
All hardware and software works now. Last two weeks I was fighting with  something "nobody knows" yet  .
My new program is , Hollywood style tool , anyone can use to document your experiments. Ver14 is free of charge as Black Magics went with cruciate against all competitors.
If anyone is interested more is here:

https://www.youtube.com/watch?v=cwohSkzU4Ok

Wesley