| 摘要 |
PROBLEM TO BE SOLVED: To provide a permanent magnet rotary machine capable of achieving a low cogging torque. SOLUTION: The permanent magnet rotary machine includes: a stator 3 having an excitation coil 16 wound therearound, and a rotor 4 rotating oppositely with a predetermined gap from the stator 3 and having a rotor core 21 on which permanent magnet 22 are disposed on a surface. In the rotary machine, the stator 3 has a stator core 11 where a plurality of magnetic pole teeth 13 holding equal space in a circumferential direction on a yoke, and protruding in a radial direction are arranged. The magnetic pole teeth 13 each have a magnetic leg 13a fixed on the yoke and a flange 13b which is disposed on a top end of the magnetic leg 13a, and protrudes in the circumferential direction. A value D/Sp obtained by dividing a height D of a root of the flange 13b by a length Sp between the magnetic teeth 13 adjacent in an inner diameter of the stator is set at≥0.129 and≤0.170. COPYRIGHT: (C)2011,JPO&INPIT |
