Quote:
Originally Posted by Ether
Joe, where did you get the specs for the FP-9013 motor??
|
I assumed that the 9012 in this sheet was a typo in
this motor comparison chart from the FIRST. You are right that is an assumption.
On another point, a PM from Ether helped me realize I was sloppy in my thinking and typing in my post above.
Me: "for struggling read closer to its stall torque"
Not true.
The motors are tied together via a gearing that links speeds (and adds torques). So... as the speed of the two motors changes, they run the same % of their individual free speeds, so each motor is also loaded at the same % of its stall torque (i.e. they are both "equally close" in some sense to their stall torques).
EVEN SO... ...I still think it is better to match stall torques.
Why? I guess it is that the lower powered motor in this case is the smaller size motor and I want that smaller motor to be farther away from its stall torque so that under high load conditions, the smaller motor is running at lower current and higher efficiency point than it would be if I matched free speeds.
Joe J.