| 摘要 |
<p>A stator of a motor of this invention includes a ring-like yoke (2), tooth-shaped iron cores equidistantly disposed on the inner periphery of the yoke (2), slots (4) defined between adjacent tooth-shaped iron cores (3), stator coils (5) fitted into the slots (4), and bridge portions (31) connecting the inner peripheral side of the adjacent tooth-shaped cores (3). A rotor (6) is so disposed as to oppose the iron cores (3) through a gap, and the proportion of a length s of the bridge portion (31) in the circumferential direction to the tooth pitch p in the circumferential direction is within the range of 0.01 to 0.20. Accordingly, a cogging torque of the motor can be reduced without lowering EMF.</p> |
