| 摘要 |
PROBLEM TO BE SOLVED: To provide a motor capable of suppressing the lowering of motor torque while suppressing cogging torque and the like.SOLUTION: A motor includes a rotor (a rotor portion 3a) equipped with a cylindrical permanent magnet (a magnet 31); and a stator 33 oppositely disposed to the rotor through a predetermined cavity, and around which a coil 34 is wound. The permanent magnet is alternately provided with a plurality of first magnetic pole areas magnetized to a first polarity (for example, N-pole) and a plurality of second magnetic pole areas magnetized to a second polarity (for example, S-pole) which is opposite to the first polarity, in a circumferential direction. Contour lines of the first magnetic pole areas and the second magnetic pole areas have first parts 311 extending while keeping first angles which are zero or more to the shaft of the rotor, on an axial direction intermediate side of the permanent magnet; and second parts 312 connecting with the first parts 311 and extending while keeping second angles larger than the first angles to the shaft of the rotor, on axial direction both end sides of the permanent magnet. |
