Rotor of rotating electrical machine and arc magnet manufacturing method

A rotor of a rotating electrical machine, comprising:

• a substantially annular rotor core;
• and
• a plurality of magnetic pole portions formed at predetermined intervals in a circumferential direction of the rotor core,
• wherein each magnetic pole portion including:
• an outer diameter side magnet portion configured by an outer diameter side circular arc magnet arranged so as to protrude radially inward;
• and
• an inner diameter side magnet portion located radially inward of the outer diameter side magnet portion and configured by a pair of inner diameter side arc magnets arranged so as to radially inward of the radially outer magnet portion,
• each arc magnet is an arc magnet in which an inner peripheral surface and an outer peripheral surface have the same arc center,
• in a case where a center axis of each magnetic pole portion is set as a d-axis, and an axis separated from the d-axis by 90 electrical degrees is set as a q-axis,
• the outer diameter side magnet portion and the inner diameter side magnet portion are formed symmetrically with respect to the d-axis,
• the outer diameter side arc magnet is disposed so as to be symmetrical with respect to the d-axis in the circumferential direction,
• the pair of inner diameter side arc magnets including:
• a first inner diameter side arc magnet located on one side with respect to the d-axis in the circumferential direction;
• and
• a second inner diameter side arc magnet located on the other side with respect to the d-axis in the circumferential direction,
• the first inner diameter side arc magnet and the second inner diameter side arc magnet are arranged so as to be symmetrical with respect to the d-axis,
• the outer diameter side arc magnet, the first inner diameter side arc magnet, and the second inner diameter side arc magnet have substantially the same shape as viewed in the axial direction,
• an arc center of the outer diameter side arc magnet is located on the d-axis,
• an arc center of the first inner diameter side arc magnet is located on the other side with respect to the d-axis in the circumferential direction, and
• an arc center of the second inner diameter side arc magnet is located on the one side with respect to the d-axis in the circumferential direction.