| 摘要 |
PROBLEM TO BE SOLVED: To prevent the positional displacement of a permanent magnet to a magnet retention hole or its detachment during manufacturing, in a rotor of an electric motor in which the permanent magnets are held in a plurality of the magnet retention holes of a rotor core. SOLUTION: The rotor is provided with the rotor core 16 having a plurality of the magnet retention holes 14, a plurality of the permanent magnets 18 accommodated and held individually in a plurality of the magnet retention holes of the rotor core, and resin filling members 22 that are filled in cavities 20 formed between each of the magnet retention hole and the permanent magnet to fix the permanent magnets in the magnet retention holes. On the rotor core 16, locking protrusions 30 are provided that temporarily hold the permanent magnets at the predetermined positions of the corresponding magnet retention holes by closely contacting each permanent magnets accommodated, in a plurality of the magnet retention holes in a semi-finished state that no resin filling member is not arranged in the cavities. The locking protrusions 30 are formed so as to be adjacent to one end surface 16c in the axial direction of the rotor core, and to protrude locally inside each magnet retention hole. COPYRIGHT: (C)2007,JPO&INPIT
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