| 摘要 |
PROBLEM TO BE SOLVED: To provide an embedded magnet type motor reducible in the number of parts and leakage flux while being achieved in high torque though using a large number of magnets. SOLUTION: An accommodation hole at a rotor core 8 having P-pieces of poles in the number of magnetic poles is composed of P/2-pieces of radial accommodation holes 8a linearly extending in a substantially radial direction, and P/2-pieces of V-shaped accommodation holes 8b (pair of magnet accommodation parts 8d) having substantially V-shapes recessed outside the radial direction. One magnetic pole includes the magnets 9 in the radial accommodation holes 8a and the magnets 10 in one of the magnet accommodation parts 8d, and another pole includes the magnets 9 and the magnets 10 in the magnet accommodation parts 8d. Large width parts 8c set larger than widths of the magnets 9 are formed at radial ends of the radial accommodation holes 8a. A plate 11 composed of a non-magnetic material is fixed to the rotor core 8, and regulating pieces 11b in the large width parts 8c for regulating the movement of the magnets 9 to the outside of the radial direction by abutting on the magnets 9 in the radial direction are formed on the plate 11. COPYRIGHT: (C)2008,JPO&INPIT
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