Kapanadze Cousin - DALLY FREE ENERGY

[itsu]

Ch4: Current through Winding A.  Please verify (this trace is from this scopeshot)

oops,  that would be the current through the TVS connected to Winding A like the one on CH5 (but because of the disconnected Winding B it changed)


So Ch4 and Ch5 could read:

Ch4: Current through the TVS diode connected to Winding A, when winding B is disconnected.
Ch5: Current through the TVS diode connected to Winding A, when winding B is connected.

Itsu

[verpies]

I noticed this before reading your last post and made the same corrections

[Jeg]

Excellent and detailed analysis. Thanks guys

[verpies]

Also puzzled about the gate signals which seems to "lag" its drain signal, how can that be?

Revisiting this issue once again in a graphical manner.

The 1^st scopeshot shows how the drain voltage waveforms appear with the body diodes present.
The 2^nd scopeshot shows how the drain voltage waveforms would appear with the body diodes absent.


P.S.
If you look very closely, you can see that the drain voltage is 1 pixel lower when these body diodes conduct, even on the 1^st scopeshot.  That's the -1.2V forward voltage of these diodes at low vertical magnification.  At less V/div and very high acquisition averaging, this could be seen even more clearly.

[itsu]

I agree with Jeg,   excellent and detailed analysis.

Nice anticipation on the questions too, thanks for the answers.
As always, things are more complex then first thought of.

So it is an illusion that the MOSFET drain signals are disturbed when looking to the voltages alone.
They really follow their gate sequence like you would expect they do and measuring current is vital in getting the total picture

So knowing this all, we can say that this push-pull circuit is doing what it suppose to do.


Thanks for this ride, it was, at least for me, interesting again.

Itsu