Rotor for axial gap-type permanent magnetic rotating machine

In connection with an axial gap-type permanent magnetic rotating machine comprising a rotor comprising a rotating shaft having an axis of rotation, a rotor yoke of disc shape radially extending from the shaft, and a plurality of permanent magnet segments arranged on a surface of the rotor yoke and circumferentially about the axis of rotation such that each permanent magnet segment may have a magnetization direction parallel to the axis of rotation, and a stator having a plurality of coils arranged circumferentially about the axis of rotation, the rotor and the stator being disposed to define an axial gap therebetween,

• the rotor wherein each of said permanent magnet segments is an assembly of two or more divided permanent magnet pieces, each of the divided permanent magnet pieces has a coercive force at a surface and an interior, and the coercive force near the surface of the magnet piece is higher than that in the interior of the magnet piece.