| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotor structure for permanent-magnet synchronous rotary electric machine which can be reduced in cost of size (increased in torque per piling margin) and increased in speed, by making the structure simpler without requiring any nonmagnetic material for reinforcement and permanent magnet for magnetic insulation. SOLUTION: A rotor structure is constituted in such a way that a first core section (a) is provided between rotor slots 12b positioned between each pole of a rotor 11 and the outer peripheral surface of a rotor core 12, adjacent slots 12d for magnet between each pole of the rotor 11 are connected to each other. A second core section (b) is provided between first projecting sections 12d-1 formed on the outer periphery side of the connecting section and second projecting sections 12b-1 formed on the inner periphery side of the slots 12b positioned between each pole of the rotor 11. A third core section (c) is provided between the slots for magnet at each magnetic pole of the rotor 11. The first, the second, and the third core sections (a), (b), and (c) are constituted in such a way that the sections can be easily saturated magnetically and can have such sizes that can support a rotating centrifugal force and can make torque transmission. In addition, the first core section (a) is formed to meet a relation, a1>a2, and the second core section (b) is formed at the center to meet a relation, b4/(2×thickness of permanent magnet) = coercive force of permanent magnet/ saturated magnetic field of steel plate), and then, the third core section (c) is formed to meet a relation, 2×c1<c2.
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