| 摘要 |
PURPOSE:To operate axially in a short shape and fine stepping angle by projecting and forming a short cylinder projected axiall with a pole from the circumferential surface from the inner periphery of an annular disc at a stator core and fixing a rotor shaft to one end surface of a rotor hub. CONSTITUTION:Short cylinders 3-1 are respectively projected perpendicularly from the inner peripheries of magnetic material annular disc at stator cores 3- 6, and poles 3-2 are arranged at an equal pitch on the inner peripheral surfaces of the cylinders 3-1. A permanent magnet 13 is mounted on the outer periphery of a hollow rotor hub 11 at the rotor, pole pieces 12, 14 are contacted with both axial end surfaces of the magnet 13, and one end surface of the hub 11 is fixed to a rotor shaft 10. Pole teeth 12-1, 14-1 are spaced at an equal pitch on the outer peripheries of the pole pieces 12, 14. |
