The Ossie motor

[Light]

Thks, Schpankme, yes, as I found out the ossie is a long-runner, but not self-one…
I made tests with 1.5v (easy to watch tendencies) and voltage drop was really low, and with 6v bttry it runs for long time and seems as a self-charger, but eventually voltage gets down…

And your schematic reminding me TROS (transistor oscillator); it’s running from 1.5v bttry too and can light bunch of lights:
http://www.youtube.com/watch?v=WRYgNbLuXs0
May I see your pics of setup you show, wondering what output you got?
thks

[captainpecan]

What we see here is induced voltage which seems to be visible only when FET is conducting.
Depending on the hall position you were catching certain part of the sinus wave of induced voltage.  Pulse from the battery is so small that is not even visible.

I'm not so sure that is correct.  I could be wrong, but I see something different.  I see the first two peaks are the induced current, and the 3rd peak is the pulse.  Notice the sharp turn off at the end of the 3rd peak.  Thats the end of the pulse.  So to break it down, it appears to me that you get the positive and negative AC peaks from the induced current, and towards the end of the negative peak it delivers a positive pulse.  This makes the negative peak take a steep incline to the positive side until the pulse is turned off.

I THINK that is what I am seeing.  But if I am correct, I am not sure if the pulse is the correct polarity to even drive that motor.  So I still am a bit confused here.  The main thing is that there is definitely 3 peaks for every pass of a coil.  One of them has got to be the drive pulse.  I can't think of what else it would be.

[Jimboot]

Thks, Schpankme, yes, as I found out the ossie is a long-runner, but not self-one…
I made tests with 1.5v (easy to watch tendencies) and voltage drop was really low, and with 6v bttry it runs for long time and seems as a self-charger, but eventually voltage gets down…

And your schematic reminding me TROS (transistor oscillator); it’s running from 1.5v bttry too and can light bunch of lights:
http://www.youtube.com/watch?v=WRYgNbLuXs0
May I see your pics of setup you show, wondering what output you got?
thks

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. Voltage b4 run 1.32. After run 1.36. The tuning of the reeds was the key for me. With the motor tuned to run at about 1000 RPM on 6V, it will take a load from this motor http://jaycar.com.au/productView.asp?ID=YM2712 and run at around 700RPM with no discernible change in voltage drop. i.e. the load does not draw more current. The output from the motor on my meters is 2.5V at around 0.2DCmA . I have tried charging the running battery but not a lot of success as I'm not sure what the hell I'm doing. However I have charged a battery of a rechargeable torch using it's motor attached to my rotor. However I have not yet been successful in getting the motor well tuned so there in no voltage drop AND had the additional motor attached. Also my motor is losing a lot of energy in my wobbly coupling.

So I would not say the voltage always drops. Not in my exp anyway. I am a complete noob but I still think the Ossie has real potential. I hope that is helpful
Love to see any vids you have of your rig.

Edit: Not sure if I'm reading the meter right. The scale is a little ambiguous for me. It measured at 66% of the 2.5 scale so I'm assuming that is around 0.16DCmA.

[Jimboot]

@Jimboot . Re the cicuit using the torch motor to charge a battery thru a diode . use a switch to short out the diode once things get up to speed . this will save energy waste in the diode and improve charge rate .

Apologies if this is a dumb question but if I short the diode won't the gen motor start drawing power from the charge battery? 

[futuristic]

Another insight into woopy's scope shots.

I think that is Hall is triggering only on 1 out of 4 rotor magnets.

During that trigger pulse FET conducts and induced voltage in coil causes current flow through circuit so we can see induced voltage on the 1 ohm resistor.

What I don't completely understand is why, the 0 of the Y axis is not in the middle of that induced voltage.

I could be that pulse into motor is actually 20mA. In this case voltage on resistor would be 20mV and if you add that +20mV to the induced voltage of coil you would get the same voltage shift up on the Y axis.

Have fun
Frenky