Full hp out of a DC motor at 10rpm! I guess not! (Getting out my calculator) Let's see, torque and speed are inversely proportional at constant hp so, if the motor is nameplated for 1750 rpm, the torque at 10 rpm would have to be 1750/10 times the design torque at full speed. I think the magnetics, the shaft, the bearings, and probably other things like the motor mounting feet would have left the scene of the accident (broken) long before we got to 175 times nameplate torque. Mercy sakes!
Using a Flux Vector AC Drive (that would be with an encoder) or the best sensorless vector drives (no encoder) you can produce full nameplate TORQUE down to essentially zero speed. That is the same performance as a shunt or compound wound DC motor.
So, Alan, the short answer is YES. You can get full nameplate torque out of a commodity AC induction motor at 10rpm. Cooling is an issue but you state that you've got that part covered. As in DC, loop tuning is very important at that speed.
There is one curious benefit to using AC over DC at these speeds and it becomes significant in polishing and buffing applications particularly. At such low speeds, a DC motor will have a rotational speed disturbance that reflects the passage of each commutator bar under the brushes. AC rotation is smoother. In polishing applications, this slight disturbance pattern appears in the polishing pattern and is usually a problem since polishing is normally to be pattern-free. Using an AC motor, in my experience, cured that problem--no more buffing pattern in the polished surface.