Patent ID: 11888353
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  F | IPC F  H

Claim 0:
1. A motor comprising:
a rotor rotatable about a rotation axis; and
a stator surrounding the rotor so as to form an air gap between the stator and the rotor,
wherein the rotor has a rotor core having a magnet insertion hole, and a rare earth magnet provided in the magnet insertion hole;
wherein the rotor core has a plurality of slits on an outer side of the magnet insertion hole in a radial direction about the rotation axis, flux barriers at both ends of the magnet insertion hole in a circumferential direction about the rotation axis, and side slits each of which is formed between a corresponding flux barrier and the plurality of slits in the circumferential direction;
wherein each of the plurality of slits has a length in the radial direction which is longer than a length in the circumferential direction;
wherein each of the side slits has a length in the circumferential direction which is longer than a length in the radial direction;
wherein the plurality of slits have a uniform minimum distance to the magnet insertion hole;
wherein when the minimum distance is expressed as T and the air gap is expressed as G, 2.75≤T/G≤5.25 is satisfied; and
wherein a side slit minimum distance from the side slit to the magnet insertion hole is shorter than the minimum distance T.