| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotor capable of discouraging demagnetization of a rear surface magnet and an interpole magnet by magnetic flux of a field magnet.SOLUTION: A rotor 4 includes a first rotor core 20 in which a plurality of first pawl-like magnetic poles 22 are formed on an outer peripheral part of a first core base and a second rotor core 30 in which a plurality of second pawl-like magnetic poles 32 are formed on an outer peripheral part of a second core base, a field magnet 40 which is arranged in axial direction between the first and second core bases, and is magnetized in axial direction so that the first pawl-like magnetic pole 22 is functioned as a first magnetic pole while the second pawl-like magnetic pole 32 is functioned as a second magnetic pole, a rear surface magnet 50 which is arranged between the first and second pawl-like magnetic poles 22, 32 and the field magnet 40, to suppress leakage of magnetic flux between them, and an interpole magnet 51 which is arranged between the first and second pawl-like magnetic poles 22, 32, adjoining each other in circumferential direction, to suppress leakage of magnetic flux between them. The shape of the outer peripheral part of the field magnet 40 is a polygon when viewed in axial direction. |
