Is this the first selfrunning overunity motor w/o batteries ? Mike?s motor

[z_p_e]

Hi Sam
nice to see another sim going.

Darren my Inductance meter arrived this morning.
Here are my windings

I wound quad-filiar
3 stands of 28AWG
1 strang of 30AWG

Trig strand = 40 Ohms at 13.14mH 30AWG
Main 2 * 28AWG in series = 50.2 Ohms at 49.6 mH
Gen = 25 Ohms 13.07 mH
These measurements were taken with the shaft in place but no rotor fitted.

Looks like winding the Main as 2 strands and putting in series has had quiet an effect on the inductance.

Wow, I'm impressed with how quick you got the meter.

I'm surprised my calculations were not closer, but that's ok, looks like the real measurements are about 42% of what I calculated.

The relative inductances you measured are almost exactly as expected Peter. And the series bifilar connection for L2 has had no effect at all on the inductance actually, since when the number of turns are doubled (which is what you have, 240x2), the inductances increases by 4. This is what you have, within 2% of theoretical.

Thanks for that. Now I can adjust my model a little.

Oh, btw, I'm pretty sure Sam's scope shots are of his real motor, not a sim.

Darren

[Peterae]

Hi Darren
LOL
Thanks
Just started glueing the magnets, still plenty to do ,i will do some pics later.

Peter

[z_p_e]

Hi Darren
looks good, have you considered the hall trigger switch time, the magnet in the film looks very wide between 5mm-8mm if you worked the diameter of the wheel out, then the rpm it should give and approximate on time.

I've considered the S1 ON time several times in me ed, but I think only the turn-on time is somewhat critical. The ON time should be sufficient only to capture the bemf effects. OFF should occur before Q1, Q2, and Q3 turn ON again, as I have shown in the scope shots.

What seems to be missing so far in every shot is what appears to be the partial induction cycle from either L2, or L3. See pic below. as long as S1 is ON for this to occur, we're ok.

Darren

[Peterae]

Hi Darren
when im up and running, and have managed to get a scope together, we can see what i get.

Still not ordered a scope yet but i am following one as we speak on an auction.
Im going to use ZTX551 and ZTX651 2 amp transistors as i have loads of these, and they are very robust, what sort of power dissipation should i expect from the drive transistors, just need to check that they will do, as they dont have collector heat tags.

Peter

[z_p_e]

Peter,

Looking at your circuit sim, Q2, and Q3 are averaging about 10mW, with peaks (very spikey) at about 300mW, so you should be ok with those Q's. Q1 seems to be averaging about 25mW, with almost no peaks.

If you find those Q's heating up a little (I really doubt it), you can always glue some metal tangs onto the flat surface of the package. This will help a little.

Darren