Analysis of the performance of permanent magnetic stepping motor with trapezoid stator tooth

With the rapid development of automation techniques, the claw-poled stepping motors are widely used, especially in optical scanners. Most research on stepping motors has concentrated on electrical properties, but a few papers have reported on the performance in relation to the magnetic-field distribution. The purpose of this study is to analyze the effect of the shape of the stator tooth and to search for the optimal parameters using a magnetic-circuit simulation technique. Through numerical calculations, the optimal performance conditions can be obtained by varying the ratio between the two bases of the trapezoid teeth between $1∕5$ and $1∕3$⁠, and varying the ratio between the heights of individual teeth in relation to the separation between the two yokes from $11∕15$ to $13∕15$⁠.