| 摘要 |
PROBLEM TO BE SOLVED: To facilitate assembly and improve heat dissipation by making the pole teeth at the upper end surface of a T-shaped salient pole face a rotor magnet in the axial direction, conducting mechanical fitting to a penetrating part formed at a stator ring in a lower end part, and protruding a part of lower end part from the surface of the stator ring. SOLUTION: A cylindrical sleeve 6 is fitted onto a rotating shaft 5, and the rotor magnet 7 of a magnetic field pole consisting of rare earth-synthetic resin type permanent magnet is fitted onto its outer periphery. On the external surface of the rotor magnet 7, 12 poles of N poles and S poles long in the rotational axis direction are magnetized alternately along the circumference. Inside the stator ring 1, 9 salient poles are formed which stand face to face through the rotor magnet 7 and a gap 13. The salient pole is a layered body formed by layering a plurality of T-shaped silicon steel plates, at root parts 15 of which slits 16 are formed. The salient pole inserted in the slit 17 of the stator ring 1 from the left is fixed so as to come into close contact with the inside of the stator ring 1 as a result of the fixing part 18 of the stator ring 1 being inserted in the slit 16.
|
