| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a permanent-magnet rotating machine that improves demagnetization resistance of a permanent magnet while ensuring production easiness and preventing an increase in production costs. <P>SOLUTION: A permanent-magnet rotating machine includes: a stator 2 with a coil 7 wound thereon; and a rotor 3 that is rotatably arranged on an inner side of the stator 2 with a space in between the rotor 3 and the stator 2 and that has a rotor core 12. The rotor core 12 has a plurality of pairs of magnet insertion holes 13a and 13b formed along a direction of an axis thereof. The pairs of magnet insertion holes 13a and 13b are arranged at equal intervals in a circumferential direction in such a manner that each pair forms a V-shape pattern that opens toward an outer circumference of the rotor core 12. Permanent magnets 14 are inserted in each of the magnet insertion holes 13a and 13b. The permanent magnets 14 have a rectangular cross-section in a direction perpendicular to the axis, and first flux barriers 15a and 15b are each formed on a side of an outer circumferential end of the permanent magnets 14 inserted in each of the magnet insertion holes 13a and 13b. Second flux barriers 16a and 16b are each formed on a magnetic-pole side of the outer circumferential end side of the permanent magnets 14 so as to improve demagnetization resistance of the permanent magnets 14. <P>COPYRIGHT: (C)2012,JPO&INPIT |
