[vamfun]

Originally Posted by Ether

Even for the small high-speed motors with the internal fans pumping air?

I saw a web page a year or so ago (don't have the link, sorry) for the Globe motor saying that the torque losses vs speed should be modeled as linear with a non-zero (positive) y intersept equal to about half the value at spec'd speed.

No... internal fans are a good example of increased torque loss vs speed. Guess I was think more on the lines of a CIM