Hi folks,
i've just achieved speed-up with shorted coil and also with a 'normal' (light bulb) load, at relativ low RPM (~ 1200, sorry no tacho
). And no Lenz, if no acceleration occurs !That's absolutely cooool ! I've never seen this before.
My setup:
A rotor (12 cm dia.) with 7 NEOs, 20 mm (dia.) x 5 mm thick (N52), NN Arrangement.
6 Coils (1 Motor-Coil, 5 Pick-up Coils)
I've achieved this with a Steel (V2A ?) screw, 45 mm long, 10 mm dia.
3 mm Distance to the Rotor. The speed-up effect occurs with both low inductance, as well with high inductance.
The higher the inductance - the better the acceleration, though.
The Dimensions of my coil bobbins: 36 mm (dia.) x 11 mm (thick), with a 10 mm hole (for audio crossover applications).
(Test) Coil Inductance, Resistance: from 470 uH, 0.8 Ohm (0.6 mm Gauge) to 2.55 mH, 6.55 Ohm (0.3 mm Gauge).
The coil to rotor distance is ~ 25 mm to end of the screw (head).
The solution to achieve OU is (most likely): A Iron Laminat Core !!!
I think, we are very, very close to OU !
Gerald
P.S.
Sorry for my lousy english, this is not my native language.
Seems like more successful replications. Yes, I think if we can do it at standard walmart fan speed. We can just make those coils and sell them. lol We just need to pin down how it works. So far we can generate some parameters:
Inductance - the higher the better
Resistance - the lower the better
Core type - high mu?
current - higher the better (too high Lenz kick in again?)
position - adjusting needed

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