Patent ID: 9219389
Filing Date: 2015-12-22
Classification: H02K

Abstract:
1. A permanent magnet rotating electrical machine comprising: a stator; and a rotatable, approximately cylindrical rotor, the rotor comprising: a shaft comprising engagement portions formed of projections and depressions; rotor cores separated from each other, the rotor cores constituting circumferentially arranged pole shoes; radially extending permanent magnets each on a circumferential side of a pole shoe among the pole shoes, each of the permanent magnets being engaged with a respective engagement portion among the engagement portions of the shaft; and side plates on axial ends of the rotor, the side plates supporting the rotor cores and the permanent magnets against centrifugal force acting in a direction of the rotor, the side plates including engagement portions which are engaged with the permanent magnets to support the permanent magnets against the centrifugal force, each of the engagement portions of the side plates including a depressed portion, wherein opposing side surfaces of each of the permanent magnets contact the projections of the respective engagement portions of the shaft, wherein peripheral end surfaces of the permanent magnets are engaged with the engagement portions of side plates, the peripheral end surfaces of the magnets being disposed on outer sides of the permanent magnets in an axial direction of the rotor such that the depressed portions entirely cover each of the peripheral end surfaces of the permanent magnets, and wherein the permanent magnets are supported by the engagement portions of the side plates on opposing sides of the magnets about the axial direction of the rotor.