The Ossie motor

[Jimboot]

something I'm playing with to increase rpms

[Jimboot]

Hey jim
The reed in your case does not necessarily need the polarizing magnet. My rotor had every other mag N out and S out. So the polarizing mag gives the reed the ability to not close when N rotor mag passes it, but will close when a S rotor mag passes it.

But your rotor mags are all same pole out. So the polarizing mag is not absolutely needed. But it still can help in tuning the reed. It would be good to make a plastic or wood stand to hold the reed, and also keep it away from any iron brackets or screws as they affect the operation sensitivity, as seen in this vid below. Look carefully at the small drill bit used to tune the reed. This was before I had discovered using the polarizing mags. The drill bit directs the rotor mag field to the reed by attraction. Watch the whole vid for the various effects.

http://www.youtube.com/watch?v=qYgs7dvyZqc


My reeds are usually activated with 1 end aiming at the rotor. This gives a sharper pulse. And a polarizing mag can help by adjusting it near the outer end to help complete the magnetic circuit in the reed for it to close.
I think I posted this vid here before, but here it is again.

http://www.youtube.com/watch?v=dXbRvIqqatI

Mags

Polarizing mags really help thanks. 1000RPM 1mw.

[Jimboot]

Really a weird field pulsing off the motor. You can feel it in your body from foot away. Should i be concerned? I've wound another bifilar coil to mags specs. I get around 10v in the cap. My winding is crap tho. I used a fishing reel to wind it, I think I need to buy an electric coil winder. Any recommendations? But have managed to keep rrpms close to 1000 whilst amps sit on 0 (0.009?). Voltage 1.303. Whilst typing next to this motor I can feel the shake of it through my arms. I have also used mags technique of polarizing the reeds. Weird new scope trace as well.

[Jimboot]

Really a weird field pulsing off the motor. You can feel it in your body from foot away. Should i be concerned? I've wound another bifilar coil to mags specs. I get around 10v in the cap. My winding is crap tho. I used a fishing reel to wind it, I think I need to buy an electric coil winder. Any recommendations? But have managed to keep rrpms close to 1000 whilst amps sit on 0 (0.009?). Voltage 1.303. Whilst typing next to this motor I can feel the shake of it through my arms. I have also used mags technique of polarizing the reeds. Weird new scope trace as well.

should add without the gen coil attached voltage at the batt gradually rises in this config.

[Jimboot]

This is the scope trace I see when voltage rises in the battery. It's across the coil.