Patent ID: 11962191
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  F | IPC F  H

Claim 0:
1. A rotor comprising:
a rotor core including a first magnet insertion hole, a second magnet insertion hole, and a center lib between the first magnet insertion hole and the second magnet insertion hole;
a first permanent magnet disposed in the first magnet insertion hole, the first permanent magnet being W1 mm long in a longitudinal direction in a plane perpendicular to an axial direction; and
a second permanent magnet disposed in the second magnet insertion hole, the second permanent magnet being W1 mm long in a longitudinal direction in the plane, wherein
the first magnet insertion hole and the second magnet insertion hole are disposed in a V shape so that a center of one pair of the first magnet insertion hole and the second magnet insertion hole projects toward a center of the rotor core in the plane,
the first magnet insertion hole includes
a first magnet disposition part in which the first permanent magnet is disposed,
a first flux barrier part communicating with the first magnet disposition part,
a first outside opening part located on an outer side with respect to the first magnet disposition part in a radial direction of the rotor core, the first outside opening part having a radius of curvature of R1 mm in the plane, and
a first inside opening part located on an inner side with respect to the first magnet disposition part in the radial direction, the first inside opening part having a radius of curvature of R2 mm in the plane, and
the second magnet insertion hole includes
a second magnet disposition part in which the second permanent magnet is disposed,
a second flux barrier part communicating with the second magnet disposition part,
a second outside opening part located on an outer side with respect to the second magnet disposition part in the radial direction, the second outside opening part having a radius of curvature of R1 mm in the plane, and
a second inside opening part located on an inner side with respect to the second magnet disposition part in the radial direction, the second inside opening part having a radius of curvature of R2 mm in the plane, and
the rotor satisfies R1>R2 and 0<(R1+R2)/W1<0.082.