摘要 |
<p>The present invention relates to a rotor core (11, 14) which has relatively high rigidity, can ensure sufficient magnetic performance, and can be produced at a cheaper cost with a relatively small-scale facility. A claw-equipped core (10, 13) and a yoke (9, 12) are manufactured separately. After fitting the yoke (9, 12) to a fitting portion formed in the claw-equipped core (10, 13), a part of the claw-equipped core (10, 13) in the vicinity of the fitting portion is axially pressed to plastically flow into an annular groove (40) formed in the yoke (9, 12), thereby integrally joining the claw-equipped core (10, 13) and the yoke (9, 12) to each other. Thus, a large-scaled manufacturing facility is not required, and claws (15, 16) of the claw-equipped core (10, 13) are hard to open in the radial direction even under the action of a centrifugal force during high-speed rotation. A stator core (3) and the claws (15, 16) of the claw-equipped core (10, 13) can be positioned closer to each other, and deterioration of magnetic performance can be avoided.</p> |