brush servo motor

Reprint of maxon motor USA October 14, 2014 white paper

To understand the concept of high efficiency motors, you must first know how to calculate efficiency and the losses associated with the motor components themselves.
The final measured efficiency of a motor is calculated based only on the elements of the particular application they’re used in.  For the motors themselves, without a load, manufacturers provide ratings based on standard formulas.  To understand high efficiency motors you only need to know what makes them different.

But first, let’s look at the basic concept used for explaining...