| 简介 |
[PROBLEMS] To increase the performance of a brushless motor. [MEANS FOR SOLVING PROBLEMS] This brushless motor (19) having permanent magnets on a rotor (12) comprises a rotor (10) having grooves in which the circumferential width (a) of opening parts (16) narrower than the circumferential width (b) of the parts of the rotor on the inner sides of the opening parts and anisotropic rare-earth bond magnets (30) inserted into the grooves (20). Since a part of the outer peripheral side curved surface (32) of the anisotropic rare-earth bond magnet directly faces the teeth of a stator through a gap, the magnetic resistance of a magnetic circuit can be minimized. |
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