| 摘要 |
PROBLEM TO BE SOLVED: To obtain a high-efficiency rotating electrical machine by suppressing the magnetic flux that flows in the direction of the axis of rotation. SOLUTION: Permanent magnets 18 of a rotor have extended magnet portions 38, which extend outside both end portions of a rotor core 16 with regard to the direction of axis of rotation of the rotor. The magnetic flux 57, generated in the extended magnet portions 38, acts in such a way as to suppress the magnetic flux 56 which tends to enter the rotor core 16 and to leak outside, flowing through proximity portions 16a of the permanent magnets 18. Thus, the magnetic flux which flows through the proximity portions 16a of the permanent magnets 18 in the direction of axis of rotation can be reduced, and effective magnetic flux for the torque of the rotor can be increased. COPYRIGHT: (C)2008,JPO&INPIT
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