Pierre's 170W in 1600W out Looped Very impressive Build continued & moderated

[listener191]

Just a Falstad simulation for half bridges simulating the coil 1 coil 2 period.

Green trace in second file is voltage across 1st MOSFET
There is some high frequency oscillation happening, which diminishes if I snub the source-drain.
Only clocking at 15Hz, but no large voltage peaks.

Current is across the 2nd inductor, which increases when the 2nd switch is turned on.

Regards
L192

[r2fpl]

listener191:  falstad has a lot of mistakes! ex. When changes to much anything does not work properly.  Help: select all, copy, reload page F5 and paste.

[listener191]

Now this is the picture when you remove all of the lower diodes, similar to the Pierre relay case.
Now there is a 206V pk spike when a coil turns off, which also would be the case if it were switch 2 staying on and switch 1 turning off. If you turn off all coils that's a 388V pk spike.

So the problem with Pierre's waveform looking so spikey, is lack of diodes in parallel with the low side relay contacts. Basic he has not provided any solid current path for the coils to discharge.

L192

[konehead]

hi Jeg
In message 249 you were asking about all the steps in voltage you see on scope between periods -
what I think all this is, is a "shorted" coil effect from his winding pattern and method, especially when the two opposing coils pass through the same slot in opposite=flow directions....this creating a bucking field, which slams the magnetic fields against each other, stopping the flow abruptly, and creating the bucking condition which also creates a shorted-condition more or less in both coils at once and this causes those hyper-spikes in voltage.....

these spikes in voltage also go "both ways" they are not like backemf/flyback spikes so much....rather ringing oscillations are created when coil is shorted; in Pierres case it is not so much a simple short of a coil by connecting coil leads together for instant with switch at the sinewave peak.......instead Pierre has more complicated (somewhat) = at least not so understandable method to create hyper-ringing spikes to his generating coils via his interweaving winding method and also passing coils through same stator slot in opposite directions
"perhaps" this has lots to do with the way it loops, and fills up the caps so well without lenz law or CEMF cancelling forces which normall occur in generators or transformers when loaded...

Normally you will see a gain in voltage into caps X20 when switch-shorting at sinewave peaks, a generator coil, X50 if all things perfect..
.
So this my konehead- theory it might have some merit might not but those spikes sure resemble peak-shorted spikes...

[gmolina]

Hi all,imho, in Pierre first video between minutes 5:09 and 6:19 i see that the core of the stator is very lightweight, out of normal, Piere can manipulate it of very easy way, the orange plastic that support winding insulators because aparently there are ausence of iron that can support it, and texture of the estator core make me think that this is a resin made core and not a iron or steel core. Maybe i could be wrong, but i hope i'm not.

Regards.

GM