| 摘要 |
PROBLEM TO BE SOLVED: To efficiently manufacture a rotor core which has a magnet inside and whose length in a rotation axis direction differs in a rotor assembly of an embedded magnet-type motor. SOLUTION: The rotor core 14 is constituted of a plurality of unit rotor cores 16 having the magnets 20 inside. Since lengths in the rotation axis direction of the unit rotor cores 16 are the same, the unit rotor cores 16 can efficiently be manufactured without changing various settings. For manufacturing the rotor core 14 different in the length in the rotation axis direction, only the number of the unit rotor cores 16 which are set in accordance with the lengths of the rotor cores 14 is changed. Thus, the rotor cores 14 can efficiently be manufactured. COPYRIGHT: (C)2009,JPO&INPIT
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