Some thoughts... These speed controllers sound like a good way to
control the speed of a motor. With the speed sensing feedback, Good
torque should be maintained at all speed ranges.

Now, the questions.... Since, the output is AC, could you feed a full
wave bridge rectifier with the controllers' output? If the output of the
rectifier is not filtered, could this unit be used with a PM motor and
still have the sensing feedback, or would the diodes block the back EMF
of the motor?

Leo (pearland, tx)