Rotating electrical machine

A rotating electrical machine comprising:

• a magnetic field-producing unit which includes a magnet unit equipped with a plurality of magnetic poles arranged to have magnetic polarities located alternately in a circumferential direction of the magnetic field-producing unit;
• an armature which is equipped with a multi-phase winding;
• and
• a rotor which is implemented by 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,
• the magnetic field-producing unit includes a magnetic core retaining the magnets,
• the magnets are magnetically oriented to have an easy axis of magnetization which has a first portion lying in a region close to a d-axis that is a center of a magnetic pole and a second portion lying in a region close to a q-axis that is a boundary between magnetic poles, the first portion of the easy axis of magnetization extending more parallel to the d-axis than the second portion of the easy axis of magnetization does, the easy axis of magnetization defining a magnet-produced magnetic path extending therealong,
• the magnetic core of the magnetic field-producing unit includes d-axis core portions through which magnetic flux passes along the d-axis,
• the magnetic core of the magnet field-producing unit does not include q-axis core portions through which the magnetic flux passes along the q-axis or alternatively includes the q-axis core portions, and
• the d-axis core portions are lower in magnetic resistance than the q-axis core portions.