Rotor core

A rotor core comprising:

• a rotor shaft hole into which a rotor shaft is press-fitted;
• a first hole group provided on an outer side of the rotor shaft hole in a radial direction and having a plurality of holes arranged in a circumferential direction;
• a shaft holding portion provided between the rotor shaft hole and the first hole group in the radial direction;
• a second hole group provided on an outer side of the first hole group in the radial direction and having a plurality of holes arranged in the circumferential direction;
• a first annular portion provided between the first hole group and the second hole group in the radial direction;
• and
• an electromagnetic portion provided on the outer side of the second hole group in the radial direction and having a plurality of magnet insertion holes in which magnets are respectively inserted, wherein:
• each hole of the second hole group is arranged to intersect with an extension line of a rib formed between the adjacent holes of the first hole group;
• an inner peripheral wall of each hole of the second hole group includes:
• a first arc point and a second arc point which are located on an arc equidistant from a center of the rotor core;
• and
• a convex portion having an apex portion on an outer side further than the arc in the radial direction;
• and
• the apex portion is located between the adjacent holes of the first hole group in the circumferential direction.