Test results: motor tuning

Hi,

There seem to be quite some doubts about the tuning of the motors. Hopefully, enclosed graph can provide some guidance. It shows the influence of the angle between the rotor magnets and the little magnet on rotor rpm. As you can see, for 2 angles, motor rpm drops to zero.
Please mind that the measurements are only approximations but the general picture should be quite OK. When you have a look at the oscilloscope pictures the dip in motor speed in what I indicated as “special area” seems to have a physical background though I have no clear idea about why that happens.

Mr. J Greef,

Probably between 180º and 250º, the coil and the rotor magnetic fields tend to cancel out, and the motor loses thrust.
In other words, the motor loses resonance. Notice that the best resonance points are 45º and 135º.
Anyway, more tests need to be done.
You could also measure the current in this points: 45º, 135º, 180º, 230º, 270º.

Keppe Motor Team