| 摘要 |
<p>In a method for manufacturing a rotor, a plurality of cut magnet pieces (31, 32) are assembled in a rotor core (10) with both cut surfaces (31a, 32a) of the cut magnet pieces (31),(32) in a engaged state. The production method for the rotor includes a cutting step and a surface treating step. In the cutting step, a magnetic substrate (30A) having a recess (30a) formed in a surface thereof is cut using the recess (30a) as a starting point, thereby forming a first magnet piece (31) and a second magnet piece (32). In the surface treating step, cut surfaces (31a) are surface treated, so as to reduce protrusions (TO) on the cut surfaces (3 1 a) of the first magnet piece (31). Accordingly, the engagement between the cut surfaces (31a, 32a) is poor, the contact area is reduced, and the contact resistance is increased. As a result thereof, the eddy currents in the cut magnets (30) flow less easily, and a loss resulting from the eddy currents may be decreased.</p> |
