| 简介 |
A permanent magnet type rotator which comprises a rotor (100), a stator (200), and permanent magnets (12) disposed on one of the rotor (100) and stator (200). The permanent magnets (12) each is an R-Fe-B type sintered rare-earth magnet which contains a light rare-earth element RL (at least one of Nd and Pr) as the main rare-earth element R. Each magnet partially includes high-coercivity parts (12a) where a heavy rare-earth element RH (at least one member selected from the group consisting of Dy, Ho, and Tb) has been diffused in a higher concentration than in the other part. |
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