| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rotor and a permanent magnet motor in which a large running torque can be obtained while facilitating formation of a plurality of slits by punching, and vibration and noise are less likely to occur. <P>SOLUTION: The rotor includes flux barriers 12 at both ends of a magnet embedment hole in a circumferential direction, a peripheral core 15 on the outer peripheral side of the magnet embedment hole, and at least three slits 16, 18, 20 of a predetermined shape formed from the flux barriers 12 at the both ends to the peripheral inside via a magnetic path of a predetermined interval. A certain region of a magnetic pole 22 of the peripheral core 15 is formed only of a magnetic part not having a slit. When the circumferential width of the certain region represents a, and the magnetic path width between the first slit 16 and the second slit 18 represents b, the relation of a>b is satisfied. A peripheral notch 28 is formed in the periphery of the peripheral core 15 on the radial outside between the second slit and the flux barriers 12. The circumferential width of the first slit 16 and the second slit 18 is larger than the magnetic path width b, and the third slit 20 and subsequent slits are elongated radially. <P>COPYRIGHT: (C)2013,JPO&INPIT |
