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Re: Sensorless back_emf speed controller
Quote:
Originally Posted by Al Skierkiewicz
Chris,
I also remember a distinctive ripple that was associated with the switching of the brush assembly. Don't quote me but I think the ripple voltage was in the 0.2-0.5 range.
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Al,
Do you think that this ripple could be sampled? I assume that the frequency would be proportional to the speed of the motor. Perhaps a Schmidt trigger could clean it up. This could then be sampled by the cRio to determine the speed of the motor. Not quite the same as back emf speed controller, but would not require a mechanical sensor to determine speed.
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662/Rocky Mountain Robotics
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