Patent ID: 11962190
Assignee: HONDA MOTOR CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A rotor of a rotary electric machine comprising:
a rotor core;
a plurality of magnetic pole portions arranged along a circumferential direction; and
a plurality of arc magnets forming the magnetic pole portions, wherein:
each of the magnetic pole portions has a magnet portion having at least two layers along a radial direction;
the magnet portion includes,
an outer diameter side magnet portion including at least one of the arc magnets arranged to be convex inward in the radial direction, and
an inner diameter side magnet portion including at least a pair of the arc magnets arranged to be convex inward in the radial direction; and

when a central axis of each of the magnetic pole portions is set as a d-axis and an axis away from the d-axis by an electrical angle of 90° is set as a q-axis,
the pair of the arc magnets of the inner diameter side magnet portion are arranged to interpose the d-axis,
a pair of ribs extending in the radial direction are respectively provided between d-axis side end surfaces of the pair of the arc magnets of the inner diameter side magnet portion and the d-axis,
a gap portion is provided between the pair of ribs to overlap the d-axis,
a distance between one of the arc magnets of the inner diameter side magnet portion and one of the arc magnets of the outer diameter side magnet portion, which is arranged on an opposite side of the one of the arc magnets of the inner diameter side magnet portion, increases from the q-axis toward the d-axis,
the pair of the arc magnets of the inner diameter side magnet portion includes,
a first arc magnet located on one side in the circumferential direction with respect to the d-axis, and
a second arc magnet located on another side in the circumferential direction with respect to the d-axis;

an arc center of the first arc magnet is located on the another side of the d-axis in the circumferential direction;
an arc center of the second arc magnet is located on the one side of the d-axis in the circumferential direction; and
in front view of the rotor core, an angle between a first virtual line and the d-axis is equal to an angle between a second virtual line and the d-axis, the first virtual line connecting a central portion of the first arc magnet and the arc center of the first arc magnet, the second virtual line connecting a central portion of the second arc magnet and the arc center of the second arc magnet.