Rotor with stress relaxation magnetic flux suppression holes with flux paths width less than length of the hole

A rotary electric machine comprising:

• a stator;
• and a rotor disposed so as to face the stator in a radial direction, wherein:
• the rotor has a permanent magnet and a rotor core that has a magnet placement hole in which the permanent magnet is disposed;
• the rotor core is provided with a stress relaxation magnetic flux suppression hole provided on one side of the magnet placement hole in a short-length direction of the magnet placement hole with respect to the magnet placement hole as seen in an axial direction and formed so as to overlap the permanent magnet in a longitudinal direction of the magnet placement hole as seen in the short-length direction, the stress relaxation magnetic flux suppression hole relaxing a stress generated by expansion of the permanent magnet and suppressing magnetic flux generated by the permanent magnet;
• the stress relaxation magnetic flux suppression hole is formed such that a total width of a minimum width of a first magnetic flux passage between a portion of the stress relaxation magnetic flux suppression hole on a first side in the longitudinal direction and the magnet placement hole and a minimum width of a second magnetic flux passage between a portion of the stress relaxation magnetic flux suppression hole on a second side in the longitudinal direction and the magnet placement hole is less than a total length of a length of the first magnetic flux passage in the longitudinal direction and a length of the second magnetic flux passage in the longitudinal direction;
• and the rotor core is disposed on a radially inner side with respect to the stator;
• the stress relaxation magnetic flux suppression hole is disposed on another radially inner side with respect to the magnet placement hole, which is one side of the magnet placement hole in the short-length direction;
• and a length of the stress relaxation magnetic flux suppressor hole along the longitudinal direction is equal to or less than a length of the permanent magnet along the longitudinal direction.