Patent ID: 8587175

Claim:
A rotor of a rotary electric machine, comprising: a rotor core having a rotational axis and a plurality of slots provided along a circumferential direction of the rotor core, each of the slots being separated by a center rib provided in a circumferentially middle area of each of the slots; a plurality of magnetic parts disposed inside the rotor core along the circumferential direction at a predetermined interval, each of the magnetic parts being magnetized in a radial direction perpendicular to the rotational axis of the rotor core and having a magnetization direction alternating with each other along the circumferential direction, each of the magnetic parts including a pair of permanent magnets placed inside each of the slots, the pair of permanent magnets being provided parallel to each other; and the rotor core comprising: a plurality of through-holes each extending in the rotor core in an axial direction parallel to the rotational axis, the through-holes being spaced apart from each other and provided on an inner circumferential side of each of the magnetic parts at circumferential positions respectively corresponding to the magnet parts; and a reinforcement rib disposed to separate each of the through-holes into a first sub-through-hole and a second sub-through-hole and disposed in alignment with a circumferential center line of the center rib, an outer-circumferential end surface of each of the first and second sub-through-holes being provided on a common circle having a center provided on the rotational axis of the rotor core.