Rotor core, rotor, and electric motor

A rotor core, wherein

• a plurality of pairs of magnet slots which extend in an axial direction of the rotor core are formed in the rotor core,
• the plurality of pairs of magnet slots are arranged at equal intervals in a circumferential direction of the rotor core in a radial cross-section of the rotor core,
• each pair of magnet slots of the plurality of pairs of magnet slots comprises a first magnet slot which is inclined counterclockwise relative to a radius of the rotor core and a second magnet slot which is inclined clockwise relative to the radius of the rotor core,
• in each pair of magnet slots, one end of the first magnet slot and one end of the second magnet slot are spaced apart from each other, and the other end of the first magnet slot and the other end of the second magnet slot are adjacent to each other at a radially inner side of the rotor core relative to the one end of the first magnet slot and the one end of the second magnet slot,
• a first hole is formed adjacent to each pair of magnet slots, and
• each of the first holes comprises a first portion corresponding to at least a part of an area between the other end of the first magnet slot and the other end of the second magnet slot, and a second portion which is continuous with the first portion and which is positioned at a radially inner side of the rotor core relative to the first portion.