Optimum Stator Core Structure in Three Phase Hybrid Stepping Motors

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  • 3相ハイブリッド形ステッピングモータの最適ステータ鉄心構造
  • 3ソウ ハイブリッドケイ ステッピングモータ ノ サイテキ ステータ テッシン コウゾウ

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Abstract

The objective of this paper is to find out optimum stator core structure for high performance in three-phase hybrid stepping motors. Output torques of various polyphase hybrid stepping motors are evaluated by using the methods of the previous paper (7). Inductances between terminals having an effect on high speed behavior are estimated. Also, arrangements of stator teeth for reducing cogging torque and linkage flux distortion are investigated on the basis of the method in the other previous paper (5). Finally, the results above mentioned are verified by FEM simulation of the hybrid steppinng motors using two-dimensional model.<br>In conclusion: (1) Three-phase motor with six winding poles is best regarding the output torque. (2) Terminal inductances are almost the same in the various motors. (3) The vernier arrangements of stator teeth are effective on reduction of cogging torque and flux distortion in three-phase hybrid motors. Totally, the three-phase motor with six poles composed of vernier teeth balanced on 6th harmonic plane accomplishes highest characteristics.

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