Simplified Evaluation Method of Drive Characteristics for Computer-Aided Design of Claw-Pole Type PM Stepping Motors

This paper proposes a simplified and fast evaluation method of the drive characteristics of claw-pole type PM stepping motors whose dimensions are given. The proposed method consists of a geometric flux-tube-based non-linear magnetic analysis and a dynamic simulator based on an analytical expression of the magnetizing curves obtained from the non-linear magnetic analysis. The proposed method allows us to easily take into account nonlinearities of the core, and to calculate static and dynamic characteristics, with a dramatic reduction in the computation time compared to 3D-FEA while keeping reasonable analytical accuracy. The validity of the proposed method is verified by experiments and finite element package using test motor