| 摘要 |
PCT No. PCT/JP86/00101 Sec. 371 Date Oct. 27, 1986 Sec. 102(e) Date Oct. 27, 1986 PCT Filed Feb. 28, 1986 PCT Pub. No. WO86/05332 PCT Pub. Date Sep. 12, 1986.A permanent magnet rotor assembly has a rotor shaft (11), and a plurality of yokes (12) extended along the axis of the rotor shaft at circumferential intervals around the rotor shaft. Permanent magnets (13) extended along the axis of the rotor shaft are held between two adjacent yokes. A pair of end plates (14, 15) attached to the axially opposite ends of the yokes are formed of a nonmagnetic material. Bosses (14a, 15a) fitting the outer circumference of the rotor shaft are formed in the respective central portions of the end plates. The bosses of the end plates are secured to the outer circumference of the rotor shaft by the compressive force of fastening rings (18, 19) mounted on the bosses by thermal shrinkage insertion. |
