Patent ID: 9106115
Filing Date: 2015-08-11
Classification: H02K

Abstract:
1. A rotating electrical machine comprising: a supporting member; a stator core including a ring-shaped yoke fixed to the supporting member and tooth portions projecting from the yoke in a radial inward direction; a winding placed in each slot between the tooth portions; a rotation shaft rotatably supported by the supporting member in the radial inward direction of the stator core; a rotor core including a boss portion and projections, the boss portion fixed to the rotation shaft, the projections projecting from the boss portion in a radial outward direction and spaced from each other in a circumferential direction; and a permanent magnet located between the tooth portions and fixed to the boss portion in such a manner that a gap is formed between the permanent magnet and the tooth portions in the circumferential direction, wherein a width of the gap in the circumferential direction is equal to or smaller than a width of a radial inward end of the tooth portion in the circumferential direction, opposing end surfaces of the permanent magnet in the circumferential direction is each defined as a first end surface, the opposing first end surfaces of the permanent magnet are planes parallel to each other, and opposing end surfaces of the projection in the circumferential direction is each defined as a second end surface, the opposing second end surfaces of the projection are planes parallel to each other, a distance between the first end surface and the second end surface which define the same gap increases in the radial outward direction, an imaginary plane coinciding with the first end surface is defined as a first imaginary plane, an imaginary plane coinciding with the second end surface is defined as a second imaginary plane, and when a center of the tooth portion in the circumferential direction and a center of the gap in the circumferential direction are aligned with each other, the tooth portion is positioned within a region defined by the first imaginary plane and the second imaginary plane which define the same gap.