| 简介 |
A permanent magnet motor according to the present invention includes : a rotor 100 and a stator 200; and a plurality of permanent magnets 12 placed on either the rotor 100 or the stator 200. Each permanent magnet 12 is an R-Fe-B based rare-earth sintered magnet including a light rare-earth element RL (at least one of Nd and Pr) as a major rare-earth element R, and partially includes a high coercivity portion 12a in which a heavy rare-earth element RH (at least one element selected from the group consisting of Dy, Ho and Tb) is diffused in a relatively higher concentration than in the other portion. |
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