| 摘要 |
<p>A motor (1) includes a rotatable shaft (8), a core (12) secured to the rotatable shaft (8), a fan (11) secured to the rotatable shaft (8), and a yoke (4) containing the core (12) and the fan (11). The core (12) has a plurality of slots (12b) around which a coil (13) is wound. The fan (11) has a plurality of blades (11c, 21). The yoke (4) has a plurality of vent holes (4b) that communicate an interior of the yoke (4) with an exterior of the yoke (4). The plurality of the vent holes (4b, 22) are arranged adjacent the fan (11). The number of slots (12b), the number of blades (11c, 21) and the number of vent holes (4b, 22) are set such that these three numbers do not share a common divisor other than 1. <IMAGE></p> |
