| 摘要 |
PURPOSE:To prevent a rotor from damaging due to centrifugal force by integrally fixing a holding bolt at the side disc of nonmagnetic material for 2P- salient poles for holding 2P pieces of magnets. CONSTITUTION:A rotor shaft 20 formed with bracing 21 is press-fitted to a boss 22 of nonmagnetic material. 2P pieces of alnico magnets 23 having magnetizing characteristic in a direction for contacting with the concentric circle of the shaft 10 is interposed at 2P-salient poles 24 laminated axially in the prescribed thickness by thin iron plates made of magnetic material. 2P pieces of recesses 27 are formed on the outer periphery with nonmagnetic material on secondary discs 25, 26, and the salient poles 24 are simultaneously passed by through-bolt 28 and clamped fixedly. |
