Patent ID: 11863020
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A motor provided in a compressor, the motor comprising:
a shaft connected to a compression mechanism portion of the compressor;
a rotor core having a shaft hole to which the shaft is fixed, an outer circumference extending in a circumferential direction about a center axis of the shaft, a magnet insertion hole formed along the outer circumference, and an opening disposed adjacent to the magnet insertion hole in the circumferential direction, the rotor core having a thin wall portion between the opening and the outer circumference;
a permanent magnet inserted in the magnet insertion hole;
a stator core provided so as to surround the rotor core from an outer side in a radial direction about the center axis, the stator core having a length in a direction of the center axis shorter than that of the rotor core; and
a coil wound on the stator core,
wherein the rotor core has a facing region where the rotor core faces the stator core in the radial direction and an overhang region where the rotor core protrudes from the stator core in the direction of the center axis,
wherein a distance from the center axis to a portion of the outer circumference of the rotor core located on an outer side of the magnet insertion hole in the radial direction is longer in at least part of the overhang region than in the facing region, and
wherein a minimum width of the thin wall portion in the radial direction is the same in the facing region and in the overhang region.