| 摘要 |
PROBLEM TO BE SOLVED: To suppress the wobbling of a permanent magnet with a simpler constitution.SOLUTION: Side faces 29a at internal peripheral sides of ends 28a, 28b of both sides of the permanent magnet 28 of a rotor core 24 are inclined at angles θa smaller than 90° with respect to the axial face 24a of the rotor core 24, a radial width Lw is narrowed toward the outside by setting the side face 29b of the external peripheral side at 90° with respect to the end face 24a of the rotor core 24, and a penetration hole 26 is formed so as to match the permanent magnet 28. By this, the wobbling of the permanent magnet 28 can be suppressed with the simpler constitution as compared with the case that there is arranged a member for fixing the permanent magnet 28 into the penetration hole 26. |
