| 摘要 |
PURPOSE:To unify a disc with a motor while a problem that the thickness of a whole structure is too large when a disc is mounted is solved. CONSTITUTION:A shaft 18 is inserted into a stator side housing 19 and a stator yoke 17 on which armature coils 16 are arranged is put onto the shaft 18. A rotor consists of a disc 13, a shielding plate 12, an axial type field permanent magnet 14 which is so magnetized as to have multiple poles, a rotor yoke 11 and a boss 10 for attaching the disc 13. The rotor yoke 11 is put on the permanent magnet 14 and the permanent magnet 14 is placed inside the disc 13 with the shielding plate 12 made of magnetic material such as iron therebetween so as to protect the disc 13 from the influence of the flux of the permanent magnet 14. Then the rotor is connected to the stator with bearings 15. |
