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Old 11-08-2011, 07:56 AM   #11 (permalink)
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sort of, it should have some torque at startup though, assuming I can tell rotor position well enough with the three hall sensors. I would have a simple commutation program that turns on a phase 120 electrical degrees before the rotor is aligned with the phase pole, I think.

I would need to study the relationship of the hall sensors to the phases and the rotor to be sure. I.e. a degree wheel and a vom and maybe some holding current through the phases to make some inferences from.


Last edited by dcb; 11-08-2011 at 08:14 AM..
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Old 11-11-2011, 10:43 PM   #12 (permalink)
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Why not just mount your Hall Effect sensors on a platform that rotates and turn it slightly to change the timing? I know it makes the physical side a little more complex, but you can tune it to have the most torque or RPM for any given voltage.

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