Simplified Evaluation Method of Drive Characteristics for Claw-Pole-Type Permanent Magnet Stepping Motors

Abstract

This paper proposes a simplified evaluation method of drive characteristics for claw-pole-type permanent magnet stepping motor. The proposed method consists of a geometric flux-tube-based nonlinear magnetic analysis and a dynamic simulator based on the analytical expression of magnetizing curves obtained through nonlinear magnetic analysis. The validity of the model was verified based on relevant experimental results for the static and dynamic characteristics of the prototype. The proposed analysis provides accurate and extremely quick magnetizing curve computation compared to three-dimensional finite element analysis (3D-FEA). The versatility of the proposed method was verified by comparing it with 3D-FEA in terms of the pull-in torque calculation accuracy for varying design parameters. Moreover, the distance between adjacent claw poles significantly influenced the pull-in torque.