| 摘要 |
PURPOSE:To enable to reduce noise without deteriorating cooling by circumferentially displacing and disposing part of arms which are axially divided into a plurality of arm sections. CONSTITUTION:An arm 4a is axially divided into a plurality, such as three, and part of the thus divided arms 4a such as the arm disposed at the intermediate of the arms 4a is displaced circumferentially and disposed. When the part is circumferentially displaced in this manner and disposed, the supporting span of the arms 4a in the circumferential direction of a stator core 1 becomes smaller than the conventional one, the deformation of the core 1 between the arms 4a can be suppressed, thereby reducing the noise. In addition, since the arms 4a are axially divided and circumferentially displaced and disposed, cooling air can be flowed, thereby maintaining the cooling preferable. |
