Patent ID: 7560842

Claim:
A permanent magnet type rotating electric machine, comprising: a stator; and a rotor provided rotatably relative to the stator, the rotor comprising a rotor core having a plurality of openings formed along a circumferential direction, a plurality of permanent magnets, each individual one of the plurality of magnets being inserted into a separate one of the plurality of openings, to each form a magnetic pole, and a filler pressurized to infill a gap between an inner circumferential surface of each of the plurality of openings and an outer circumferential surface of each of the plurality of permanent magnets, wherein the rotor core further comprises a first hole arranged between each of the magnetic poles of the rotor core and a second hole arranged at a substantial center of each of the magnetic poles of the rotor core and arranged along the circumferential direction of the rotor core to absorb deformation of the rotor core in a radial outward direction, wherein the first hole is either (a) substantially elliptical with a major axis that lies in a radial direction of the rotor core or (b) located on an inner circumferential side of the rotor core and is substantially triangular, including a first side and a second side, each of the first side and the second side being separately substantially parallel to an adjacent one of the plurality of permanent magnets, and wherein the second hole is substantially triangular and includes a first side and a second side, each of the first side and the second side being separately substantially parallel to an adjacent one of the plurality of permanent magnets.