Kapanadze Cousin - DALLY FREE ENERGY

[soliman]

this is de correct circuit.
I am sorry

[NickZ]

    Itsu, and All:
   I've started on the non dissapative snubber circuit. Picture below.
   I hand wound these two chokes, but I'm not sure how they'll work out yet.
   The yellow caps are 0.1uf. And all four diodes are the 15A MUR1530.
   I'll be connecting it all up tomorrow, and testing the results.
   I did also keep the blue 2000v caps on my RC snubber, between drain and source, but without any snubber resistors.

 

[itsu]

Soliman,

thanks for the screenshots, it shows that the TL494 outputs a (max.) 43% duty cycle signal as expected and that the TC4093 chip is able to
crank up (delay) the duty cycle till almost 50%.
Be aware that any further setting will cause the both MOSFETs to be active at the same time causing very high current to flow.

It could be that this higher duty cycle has some influence (smaller) on the created spike.

I do notice your scope is set to AC coupling causing the signals to be "offset" to the middle.

Also now the frequency is 16.5Khz which is more as to be expected for series resonance of the LC circuit.

Itsu

[itsu]

Nick,

looking good and neat, i have no idea what the chokes value will be, but we will see how it turns out.


Itsu

[Hoppy]

Soliman,

It could be that this higher duty cycle has some influence (smaller) on the created spike.

Itsu

Yes, this may be the case and could be important both for spike reduction and correct switching to meet self-running requirements , thus the extra circuitry employed. I'm dubious about the real need for power hungry snubbing, given that Stalker's circuit shows none. He does however show fast protection diodes to compliment mosfet body diodes.