Rotating electrical machine

A rotating electrical machine comprising:

• an armature;
• a yoke that is formed in a circular cylindrical shape and that is provided at outer side in a radial direction of the armature;
• and
• a plurality of magnets that are arrayed in a ring shape along an inner peripheral face of the yoke, that are respectively formed in circular arc shapes that are fit with the inner peripheral face of the yoke, and that are fixed to the inner peripheral face of the yoke;
• wherein:
• the plural magnets are arrayed along the circumferential direction of the yoke with gaps between each other,
• a central portion in a circumferential direction of each of the magnets is disposed so as to be opposed in a yoke diameter direction to the gap between other magnets arrayed adjacent to each other,
• a boundary portion between a pair of magnetic poles in each of the magnets is positioned at central position in the circumferential direction of each of the magnets, and
• each of the magnets is formed thicker at end portions in the circumferential direction thereof than at the central portion in the circumferential direction thereof.