Table for permanent magnet rotor and method for manufacturing permanent magnet rotor
A method for assembling rotors which is applicable to a large axial gap type permanent magnet rotating machine is provided. A permanent magnet rotating machine comprising: a rotating shaft; at least two rotors comprising a table-like structure and permanent magnets attached thereto, the table-like structures being connected to the rotating shaft and being disposed in an axial direction of the rotating shaft; and a stator comprising a table-like structure and stator coils around which a copper wire is wound, said stator being disposed in a gap formed by the rotors so that the stator being separated from the rotating shaft, is manufactured by the following steps of: assembling the two rotors such that a predetermined gap is formed therebetween; and mounting the magnets on the table-like structures by inserting the magnet from the radially outer side of the table-like structures towards the center of the rotation with the assembled state being maintained.
1. An axial gap type permanent magnet rotating machine, comprising
a rotating shaft;
at least two rotors, each comprising a rotary table and permanent magnets, each rotary table having a through hole in which the rotating shaft is inserted and having a plurality of holes in a manner radially lined and spaced from the through hole, the permanent magnets being mounted on a surface of the rotary table through at least one magnetic plate, the rotors being spaced apart in an axial direction of the rotating shaft, being arranged so that the magnet-mounting surfaces face to each other, and being rotatable together with the rotating shaft;
a spacer for holding each gap formed by the at least two rotors; and
a stator comprising a fixed table and coils supported by the fixed table, the stator being disposed in each gap formed by the at least two rotors, and being separated from the rotating shaft,
wherein each of the permanent magnets is secured to a front surface of the magnetic plate having a width greater than each of the permanent magnets so that the magnetic plate forms flanges on its lateral ends and has threaded holes at the flanges, a back surface of the magnetic plate is placed on the surface of the rotary table, and the magnetic plate is secured to the rotary table by bolts inserted in a substantially parallel direction to a rotation axis through the threaded holes and the holes of the rotary table.
2. The axial gap type permanent magnet rotating machine according to claim 1 , wherein the permanent magnet is divided into several pieces and the divided pieces are mounted on the rotary table.