Patent ID: 11962194
Assignee: DENSO CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. A rotating electric machine comprising:
a field system including a magnet section having a plurality of magnetic poles whose polarities alternate in a circumferential direction; and
an armature including a multi-phase armature coil,
wherein
either of the field system and the armature is configured as a rotor,
the magnet section includes first magnets that each correspond to one of the magnetic poles of the magnet section and are arranged at predetermined intervals in the circumferential direction, and the magnet section also includes second magnets each of which is arranged between one circumferentially-adjacent pair of the first magnets to extend across a q-axis,
each of the first magnets is oriented to form a magnet magnetic path parallel to a d-axis,
surfaces of the second magnets facing the first magnets constitute magnetic flux acting surfaces through which magnetic flux flows into or out of the second magnets,
each of the second magnets is oriented to form, at the q-axis, a magnet magnetic path deviated from a direction perpendicular to the q-axis, and
either (i) 2π/3<θa≤4π/5, (ii) θa=4π/5, or (iii) 4π/5<θa<π, where θa is a main magnetic pole angle which is defined, for each of the first magnets, as an angle between (i) a straight line extending through one of two q-axis-side ends of the first magnet in the circumferential direction and an axis of the rotor and (ii) a straight line extending through the other of the two q-axis-side ends of the first magnet in the circumferential direction and the axis of the rotor.