Patent ID: 11831204

Abstract:
A rotor core has first and second core parts in an axial direction. The first and second core parts have first and second magnet insertion holes in which rare earth magnets are disposed. A width of the first magnet insertion hole is wider than the second magnet insertion hole. The first core part has one or more slits elongated in the radial direction, the number of which is N1 (≥1), on a radially outer side of the first magnet insertion hole. The second core part has no, one or more slits elongated in the radial direction, the number of which is N2 (≥0), on a radially outer side of the second magnet insertion hole. N1>N2 is satisfied. A ratio of a length of the second core part in the axial direction to that of the rotor core is greater than or equal to 70% and less than 100%.