Rotor, and rotary electric machine provided with same

A dynamo-electric machine comprising:

• a rotor including
• a core having a through hole group including three or more through holes arranged in a circumferential direction, the through hole group being formed through a predetermined magnetic pole, and
• two or more ribs configured as portions of the core, each of the two or more ribs being interposed between associated adjacent ones of the through holes included in the through hole group;
• and
• a stator provided radially outward of the rotor,
• the three or more through holes being arranged in a shape of an arc protruding toward an axial center of the rotor,
• the two or more ribs including at least two ribs having respective inclinations with respect to a magnetic pole centerline that are different from each other, the at least two ribs including a first rib having a first inclination with respect to the magnetic pole centerline and a second rib having a second inclination with respect to the magnetic pole centerline, the second inclination being larger than the first inclination, the magnetic pole centerline being a straight line that passes through a radial center line of the magnetic pole and an axial center of the rotor,
• the first rib being narrower than the second rib, and
• an inclination of an arbitrary rib, which is any one of the two or more ribs, with respect to the magnetic pole centerline representing an angle formed between the magnetic centerline and a straight line connecting an arbitrary point on the magnetic pole centerline to a center of the arbitrary rib,
• the inclination being smaller as a direction in which the arbitrary rib extends approaches a direction parallel to the magnetic pole centerline.