3-D dynamic transient analysis of stepping motor for wristwatch by finite element method

Stepping motors are widely used for various electric instruments. It is necessary for the optimum design to analyze the dynamic characteristics accurately. Our method, which is the 3-D finite element method with edge elements taking into account the rotation of the armature, has been expanded to analyze the dynamic characteristics of a stepping motor for a wristwatch excited from square pulse voltage source. The validity of our method is confirmed by experiments.