Rotor for rotary electric machine

A rotor for a rotary electric machine, comprising:

• a rotor core that is configured to rotate about a rotational axis;
• and
• a magnet that is a ring member and is coaxial with the rotor core, wherein the magnet is assembled to an axial end part of the rotor core and is used for sensing a rotational angle of the rotor, wherein:
• in a relative coordinate system to be rotated integrally with the rotor core, a predetermined direction, which is perpendicular to the rotational axis, is defined as a first direction, and a direction, which is perpendicular to the rotational axis and the first direction, is defined as a second direction, and a direction along a circumference about the rotational axis is defined as a circumferential direction;
• the rotor core includes only one pair of positioning portions which are arranged to be point-symmetric about the rotational axis;
• the magnet includes only one pair of positioning portions which are arranged to be point-symmetric about the rotational axis and are respectively engaged with the one pair of positioning portions of the rotor core to position the magnet relative to the rotor core in the first direction, the second direction and the circumferential direction;
• the magnet includes a main body, which is shaped in a ring form, and a pair of projections, which axially project from the main body toward the rotor core;
• and
• each of the one pair of positioning portions of the magnet is formed only at a corresponding one of the projections without extending to the main body and has a planar surface which is parallel with the first direction.