Rotor, motor, compressor, and air conditioner

A rotor comprising:

• a rotor core including two or more first electromagnetic steel sheets and two or more second electromagnetic steel sheets that are stacked in an axis line direction;
• and
• at least one permanent magnet disposed in the rotor core, wherein
• each of the two or more first electromagnetic steel sheets includes
• a first magnet insertion hole in which the at least one permanent magnet is disposed,
• a first thin portion provided between an outer end portion of the first magnet insertion hole in a radial direction of the rotor core and an outer peripheral surface of the rotor core, and
• a magnet locking portion that is adjacent to the first thin portion and is in contact with an end of the at least one permanent magnet, the end of the at least one permanent magnet facing the outer peripheral surface of the rotor core,
• a center portion of the first magnet insertion hole is situated close to an axis line with respect to both end portions of the first magnet insertion hole in a circumferential direction in a plane perpendicular to the axis line,
• each of the two or more second electromagnetic steel sheets includes
• a second magnet insertion hole in which the at least one permanent magnet is disposed, the second magnet insertion hole communicating with the first magnet insertion hole, and
• a second thin portion provided between an outer end portion of the second magnet insertion hole in the radial direction and the outer peripheral surface of the rotor core,
• a center portion of the second magnet insertion hole is situated close to the axis line with respect to both end portions of the second magnet insertion hole in the circumferential direction in the plane,
• each of the two or more second electromagnetic steel sheets does not include a portion that is in contact with the end of the at least one permanent magnet,
• W1>W2 is satisfied, where W1 is a minimum width of the first thin portion in the plane and W2 is a minimum width of the second thin portion in the plane, and
• a length of the second thin portion in the circumferential direction is larger than a length of the first thin portion in the circumferential direction.