Rotating electrical machine

A rotating electrical machine comprising:

• a magnet unit which is equipped with a plurality of magnetic poles arranged to have magnetic polarities located alternately in a circumferential direction of the rotating electrical machine;
• a magnetic field-producing unit which is made of a plurality of plate members stacked on one another in an axial direction of the rotating electrical machine, the magnetic field-producing unit being equipped with a magnet retainer which retains the magnet unit;
• an armature which is equipped with a multi-phase winding;
• and
• a rotor that is one of the magnetic field-producing unit and the armature, wherein
• the magnet unit includes a plurality of magnets arranged adjacent each other in the circumferential direction, each of the magnets being magnetically oriented to have easy axes of magnetization in a region, as located near a d-axis that is defined on a center of the magnetic pole, to be more parallel to the d-axis than those in a region located near a q-axis that is defined on a boundary between the magnetic poles, each of the magnets being arranged to have a center thereof on the d-axis between a respective two of the q-axes arranged adjacent each other in the circumferential direction, each of the magnets having magnet magnetic paths extending along the easy axes of magnetization,
• the plate members have holes which are aligned with each other in the axial direction and in which fasteners are disposed to fasten the plate members together,
• the magnet retainer has divider walls each of which is located between a respective two of the magnets arranged adjacent each other in the circumferential direction and extends along the q-axis to isolate between the magnets, and
• the holes are aligned with the divider walls in a radial direction of the plate members.