| 摘要 |
PROBLEM TO BE SOLVED: To assure constant performance not depending on the accuracy of the punching mold. SOLUTION: The end part 30a of a stator teeth 30 and an involute 20b at the internal circumference of a stator core 20 connected to the end part 30a are formed of the involute at the circumference around a rotating shaft C of stator. Since, when the stator teeth 30 rotates, a gap between the involute 20b at the internal circumference of stator core 20 and end part 30a of the stator teeth 30 can be reduced, if the accuracy of stator teeth 30 is low, assembling to the stator core 20 can be realized under the constant joining condition.
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