Quote:
Originally Posted by vamfun
There are some components of friction/motor losses that change with speed but I think they are generally small relative to coulumb friction.
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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.