Stator fixing structure

A stator fixing structure comprising:

• a projecting part projecting in a radial direction from a center of a stator provided on an outer periphery of the stator formed by stacking a plurality of plate-shaped members;
• a fastening member inserted in a fastening-member insertion hole formed in the projecting part to fix the stator to a frame;
• an outer peripheral surface of the stator excluding the projecting part fixed by shrink fitting to an inner peripheral surface of the frame, the projecting part having a root at a same radial distance from the center of the stator as the outer peripheral surface, the root extending circumferentially in a circumferential direction from a first end portion adjacent a first region of the outer peripheral surface to a second end portion adjacent a second region of the outer peripheral surface;
• a first dent formed at the first end portion;
• and
• a second dent formed at the second end portion,
• wherein the dents are sized and arranged to increase a contact area between the inner peripheral surface of the frame and the outer peripheral surface of the stator excluding the projecting part,
• wherein the first dent and the second dent extend circumferentially without overlapping the fastening-member insertion hole circumferentially,
• wherein the dents are configured to be hollow.