Patent ID: 7839040
Filing Date: 2010-11-23
Classification: H02K,Y10T

Abstract:
1. A permanent-magnet generator rotor comprising: a first shaft end portion having in an axial center a hollow portion through which a bolt is passed; a second shaft end portion having in the axial center a hollow portion and a bearing portion through which the bolt is passed; a magnetic cylindrical body fixed between the first and second shaft end portions; a permanent magnet held on an outer circumferential surface of the magnetic cylindrical body, the permanent magnet having a cylindrical form and being divided into plural ring-shaped magnet pieces in an axial direction; a non-magnetic cylindrical body shrink-fit onto the outer circumferential surface of the permanent magnet; a stator disposed around the permanent magnet; and a bolt penetrating through the first and second shaft end portions, the hollow portions, and the magnetic cylindrical body.