| 摘要 |
PROBLEM TO BE SOLVED: To suppress the occurrence of vibration and noise to obtain stable rotation. SOLUTION: There is provided a stator 1 in which three stator units 3A, 3B and 3C formed by respectively winding coils 9a, 9b and 9c around teeth 7a, 7b and 7c of stator cores 4a, 4b and 4c, made of a magnetic steel plate, respectively including annular core backs 5a, 5b and 5c, and the plurality of teeth 7a, 7b and 7c radially extending from the core backs 5a, 5b and 5c, respectively, and circumferentially arranged at intervals, are laminated in a plate thickness direction of the stator cores 4a, 4b and 4c so as to contact each other. The upper and lower teeth 7a and 7c of the upper and lower stator units 3A and 3C are arranged at positions facing each other in a laminating direction so that their phases match with each other and do not match with a phase of the middle teeth 7b of the middle stator unit 3B, and the almost whole of the middle teeth 7b in a circumferential direction is arranged between the teeth 7a and the teeth 7c adjacent to each other in the circumferential direction when viewed in the laminating direction. COPYRIGHT: (C)2013,JPO&INPIT |
