| 摘要 |
PROBLEM TO BE SOLVED: To provide a motor which improves detent torque and has strong holding power.SOLUTION: Tooth side auxiliary grooves 15 are formed on an inner peripheral face 11a of each tooth 11 arranged in a stator 2. A cross-sectional shape in an axis orthogonal direction on the inner peripheral face 11a as a whole does not become a concentric circle with a center axis O of a rotation axis 3 as a center. Thus, detent torque can be increased and holding force in a static state of the brushless motor M is increased. |
