Patent ID: 11888354
Assignee: HONDA MOTOR CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A rotor for a rotary electric machine comprising:
a rotor core having a substantially annular shape centered on a rotation axis; and
a plurality of magnetic pole portions formed in the rotor core along a circumferential direction, wherein:
each of the magnetic pole portions includes a magnet accommodating hole formed in the rotor core and extending in an axial direction, and a permanent magnet accommodated in the magnet accommodating hole;
the permanent magnet includes a first main surface extending in the axial direction and a second main surface extending in the axial direction;
the magnet accommodating hole includes a wall portion which forms a contour of the magnet accommodating hole when viewed in the axial direction;
a saturation portion which is magnetically saturated during no-load operation of the rotary electric machine is formed in the rotor core at a position facing at least one of the first main surface and the second main surface of the permanent magnet when viewed in the axial direction;
when viewed in the axial direction, the saturation portion includes:
at least one core protrusion formed between the wall portion of the magnet accommodating hole and at least one of the first main surface and the second main surface of the permanent magnet such that a part of the rotor core extends in a direction intersecting the first main surface or the second main surface; and
at least one nonmagnetic portion formed between the wall portion of the magnet accommodating hole and at least one of the first main surface and the second main surface of the permanent magnet;

the at least one nonmagnetic portion comprises a plurality of nonmagnetic portions; and
when viewed in the axial direction, the saturation portion includes the at least one core protrusion and the plurality of nonmagnetic portions formed in the at least one core protrusion.