Kapanadze Cousin - DALLY FREE ENERGY

[MenofFather]

    MenofFather:
   Might be a zener diode, but might not be, also. Why are they facing towards each other? Is this really a common way to protect the Fets?  I don't use Fets, so I don't know...  As they can easily fry out, especially when allowing  them to get the high current back emf pulses 1:10 to deal with, as Ismael is mentioning. They are fast switching, but are also weak. Seams to me that special high current and high voltage diodes are what is needed.  No?

I not use zener face to face, but maybe that better protection than only one zener diode. Akula made very much protection, very good protection, but I use only one zener diode for protection, he protect not only gate, but source and drain probarly.
"  Is this really a common way to protect the Fets?" I see scematic on kacher on mosfet in it also is zener diodes face to face.  So it maybe common protection for mosfets.
" Seams to me that special high current and high voltage diodes are what is needed.  No?" There you need it put? Смотря где ставить.

[Hoppy]

    Hoppy: 
   Thanks again.  Back to back diodes as you say, is one thing. Which I understand.
But front to front, (or facing diodes), could be bucking diodes, and not protecting, at all, and may be doing something completely different? Especially is they aren't zener types. 
   Anyway just thinking out loud.

Nick

See this data sheet which shows the component symbols as connected back-to-back.

[MenofFather]

 
  But, if the guy had a self runner, that is unusual. And, that it's not easy to find the right frequency, is also becoming more known each day, which is not making it any easier to obtain the needed results.

If you want I can put schematic and videos of this divice.

[MenofFather]

In one my experiment, seems something be wrong and zener diode for protection mosfets makes very hod and then break to two parts. So I recomendate use very stron zener diodes for very good protection let say, or 2-5 zener diodes not that stron in parallel. But if you not made mistakes in schematic then normal zener diodes protects mosfet.

[anandml]

I think rectified 220v from the inverter is connected to the TL 494 pin no 1 or 16 with the help of resisitor and LC filter. Please correct me if i am wrong. If tl494 control the pulse witdth to the MOSFET according to the feedback from the inverter output? As the load increased on inverter ac side the voltages decrease but tl494 sense it and increase the dutycycle...