@ Frewnky

i can not open your circuit  image with the schottky diode

please send again

good night

laurent

OK got it

good night will test tomorow

thanks

Laurent

@woopy and Future,
looking good guys, I think we are getting close to figuring out that trace.  I think I see where your going with that addition of the shottky, will be interesting to see what comes out of it.

“Hey Light. I'm still unclear what the def of a self runner is but I had one run for 97.5 hours on a D cell at 250-300 RPM before I switched it off”.
- Hi, Jim. I have 144 hrs of running time on single 1.5v bttry, but with voltage drop. On small scale it’s easy to notice even slight difference in setup.
Self-runner; look, you said “Voltage b4 run 1.32. After run 1.36” and “I have tried charging the running battery but not a lot of success”.
This’s a point – to charge the running bttry, and then and only then we can say this’s self-charger and self-runner.
Your bttry got charge after disconnection, it’s ability any normal bttry for recovering.

So, our goal (at least mine) to get charge back to RUNNING bttry.

And I like how it’s going in this thread.

“Love to see any vids you have of your rig”.
- Thks, yes I'll show more as get any success…or if it goes interesting…

cheers

That's xlnt feedback. Thanks. That's what I thought a self runner would be. I have pick up coils setup atm but my current rig won't allow separate tuning of them. In your opinion is there potentially more energy in my pick up coils or my motor. Just wondering which may have the bigger payoff. I'm thinking my PU coils. Bigger coils than the motor and more potential energy in my mags. Basically I'm replicating the ossie above the original. So same size coils & mags as the motor.
Thanks again.

@ Futuristic and Cp

tried the schottky between Drain and ground. And no change at all on the trace. I tried also a 1n4007 diode  and idem.

I suppose you wanted to check if the irf 540 integrated diode was OK, so i change against a BUZ 11 and no change at all. Than i also disconnected the bridge (which do nothing) and no change at all.

This morning i could get 1.7 ma and the power battery is always at 12. 18 volts and Rpm are at 470.

Tan i mounted a propeller to load the motor, the Rpm decrease to 433 and the current goes up to 4.4 ma.  see the trace is changing now. All the trace is  above the zero line

So than i decided to brake the rotor with my finger and i stabilised the rotor to get about 13 ma  and now the trace goes up. see pix 3

Hope this helps

Laurent

I think I've got this figured out pretty well.  At least it is starting to make sense.  What we appear to be seeing is the bemf caused from the pulse and the inductive wave butting against each other is trimming the peak off of the trace.  That trimming of the peak we see in the trace, appears to be showing up in the other trace shot.  It's disappearing from one, and reappearing in the other.  This could be a little nugget of info we need to determine if we are capturing any extra energy from the BEMF.  I see the same thing in woopy's new traces he just posted.  The peak that disappears from one, shows up in the middle of the other.  This at least indicates that the peak of the pulse that disappears, does not leave the circuit, it just get's redirected.  Now, this also could be showing up this way because of how the probes are hooked to the circuit.  I'm thinking Ossie and JLNaudin had the probes hooked to a slightly different place in the circuit.  This trace could possibly look identical to theirs if probes were hooked different.
Woopy, could you please double check where your probes are hooked up, and let us know exactly where in the circuit they are for sure.  Then we can try and compare with what we are seeing in JLNaudins and Ossies to see if we are indeed seeing something different, or just seeing the same thing in a different way.

Take a look, and let me know what you think.

@ woopy,
Thinking about your results, and looking over your circuit again, makes me wonder a couple things.  There does not appear to be any recovery going on here.  The coils are only hooked up to the circuit when the mosfet is turned on.  Then when it is turned off, the field is pretty much forced to collapse into the surrounding air instead of redirecting to the battery or anything.  Is there some reasoning behind wanting to do it this way?  As far as I can tell from your circuit, I see no generative effect at all there.  The coils are not even hooked to the circuit because of the open mosfet the entire time, except for the brief time you are pulsing it.  It's kind of like you are running a pulse motor with the same theories of a conventional motor.  I am not sure what you are looking to do here, are you simply after the most possible torque?  If so there are some things that could be tried to do that, including adding a small cap across the coils and try to tune it to resonate.  If that is not what you are wanting to do, then maybe it's time to start adding some kind of recovery circuit and pull that lagging magnetic field out of those coils when you don't need it hanging around and poke into some batteries or something. It really does help a motor run much smoother when you recover it.  I'm not trying to be negative, just calling it as I see it.  Maybe it's just a test circuit, and you plan on adding the recovery anyway, and you just haven't got that fare.  I just wanted to throw my thoughts out there, maybe something will help.

As far as it speeding up when you remove coils, it makes sense with your setup.  As I see it, your BEMF that is limiting your current flow is cutting down more and more with each coil removed.  Simply cutting down the BEMF by 25% by removing one coil, will allow more current to flow.  More current flowing will drive the motor harder and show more torque.  You must remember, you are now sending more current into that motor.  You SHOULD be getting higher rpms and more torque.  What your looking for is efficiency I believe.  Having the extra coils gets you slightly more torque and speed for LESS current draw.  It just depends on what you want your motor doing.  Be more efficient, or run at break neck speeds and high torque!  A good combination of both would be ideal.  At least that is my theory right now.

Also, from looking so closely at your scope shots.  It almost looks like your actually feeding energy backwards through that mosfet, and INTO your trigger circuit.  That's just wierd... 

I've been working hard though the day and results are here.

Video will come tomorrow because it's currently uploading to YT and I'm going to bed (almost 1AM here).
I will also do scope shots tomorrow...

So here is gallery