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Originally Posted by Kevin Sevcik
Umm... Has anyone else noticed that it's technically impossible to limit the motor to 6V in programming? I mean... We're talking PWMs here. It's all 12V with varying duty cycle. And at 50% duty cycle, I don't think the motor would magically smooth the pulses out into a 6V signal.
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In effect, that's exactly what motors do when driven with pulse-width modulated power. The frequency is high enough, and the inductance of the motor is high enough, and the resistance of the motor is high enough...it makes a dandy low-pass filter.
Even if it isn't
really smoothing the pulses completely, the thermal mass of the windings is great enough to make the average power more important than the peak power.