Kapanadze Cousin - DALLY FREE ENERGY

[itsu]

Ok,  that seems to help somewhat.


I first tried to lower the drain voltage from 24V all the way down to 2V but the spikes and early activating of the MOSFETs were still there.
So this means to me there is no saturation of the core,  right?


Then i added a 100uH toroid choke between center tap and drains supply rail, which made the spikes wider and increase tremendes, but shows that the drains are now kind of following the gate signals, see screenshot.
I had to lower the duty cycle as with max duty cycle (44%) the spikes are way up.

So what does that mean? 

Thanks Itsu

[Hoppy]

Itsu,

Try a much larger inductance, high current choke.

[itsu]

Ok,  tried that, using a 1200uH choke, but the effect is similar as above, but now it seems that each MOSFET is triggered by the both gates 

Itsu

[Hoppy]

Itsu,

The situation although changing, is not being helped by a big increase in choke inductance. Your gate pulses look clean, so the only other thing I can think of is a possible problem with your grounding arrangement. However, it might be worth trying a choke a little higher than 100uH, to see if the waveform improves before it goes into a double pulse, which you may have already tried.

[itsu]

Thanks Hoppy,

i will do some experimenting on this setup, but somehow i think that we all must have this specific problem, not me alone.
But i have taken already to much space on this thread with this.

I have wound a "verpies lossless clamp" yoke, so i could see later this week if that will work any better.

Regards Itsu