ISO Efficiency Curves of a -Two-Phase Hybrid Stepping Motor

Stepping motors are used in numerous applications because of their low manufacturing cost and simple speed control. It is well known that their energetic efficiency is low but actual values are typically not available. In this paper the influence of the control algorithm on the efficiency of the stepping motor is analyzed, measured and discussed. For a good comparison of the efficiency for the different analyzed algorithms, ISO efficiency curves are used. As the number of stepping motors installed worldwide is enormous, a few percents energy saving per stepping motor can mean a big difference in global energy use.