| 摘要 |
In a motor according to an embodiment of the present invention, a rotor includes a plurality of core piece portions which are disposed in a circumferential direction, and a plurality of permanent magnets, each of which is disposed between the core piece portions in the circumferential direction. The permanent magnet has two magnets disposed along the circumferential direction. The same poles of magnetic poles of the permanent magnets adjacent in the circumferential direction face each other in the circumferential direction. The core piece portion includes a concave portion in which the inner surface in the diameter direction is concave outwards in the diameter direction, and two protrusion portions which are positioned on both sides in the circumferential direction of the concave portion and protrude inward in the diameter direction along each of the adjacent permanent magnets. When a line segment connecting the outer end in the diameter direction of the concave portion and the inner end in the diameter direction on the plane opposed in the circumferential direction to the permanent magnet of the protrusion portion is a first line segment, the protrusion portion has a portion positioned inside the diameter direction of the first line segment as viewed in the axial direction. |
