Rotor, rotor core, induction motor, and method of designing induction motor

A rotor comprising:

• a rotor core;
• and
• a plurality of secondary conductors disposed in the rotor core at an interval in a circumferential direction of the rotor core, wherein:
• the rotor core including a plurality of insertion holes formed so as to penetrate the rotor core in an axial direction of the rotor core, the insertion holes into which the secondary conductors are inserted,
• the rotor core including a slot provided outside each of the secondary conductors in a radial direction of the rotor core, the slot open to an outside in the radial direction,
• each of the secondary conductors exposed to the outside in the radial direction through the slot,
• the rotor core including a pair of end surfaces provided so as to face each other with the slot interposed between the pair of end surfaces in the circumferential direction;
• and
• at least one of each of the secondary conductors or each of the insertion holes has a shape symmetrical in the circumferential direction with respect to a reference line defined so as to intersect a center axis of the rotor core and pass through a center of each of the secondary conductors in the circumferential direction, and
• the pair of end surfaces are asymmetrical in the circumferential direction with respect to the reference line.