Jan de Kruyf wrote:
> So I would say that ultimately also a 3phase drive will have a current loop
> to negate the RL factor of the winding.
But, this requires at least two current sensors, and they have to 
account for the commutation and sinusoidal drive to provide unvarying 
torque.  So, it gets a LOT more complicated than on a brush drive.

Jon

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