Patent ID: 7327062
Filing Date: 2008-02-05
Classification: H02K

Abstract:
1. A rotor for a rotary electric machine, comprising: a rotation shaft; a plurality of rotor cores fixed to the rotation shaft and axially split, each of the rotor cores having an outer peripheral surface with a circular cross section; and permanent magnets arranged at equal circumferential intervals and extending through the rotor cores; wherein voids which axially penetrate the rotor cores are formed between the outer peripheral surfaces of the rotor cores and the permanent magnets, and the voids of two adjacent rotor cores are formed at circumferentially different positions, wherein two adjacent rotor cores are of the same specification with respect to the permanent magnets and the voids and are arranged in axially opposite directions, and wherein the voids of the rotor cores are arranged at equal angular intervals as seen from an axial direction.