Patent ID: 8901788

Claim:
An electric motor comprising: a stator having a stator core and a coil wound around the stator core; a rotor having a rotating body positioned inside the stator and a shaft connected to the rotating body in a manner to penetrate through the center of the rotating body; a bearing rotatably supporting the shaft; and a bracket fixing the bearing; wherein the rotating body comprises: an outer iron core configuring an outer peripheral portion of the rotating body and comprising a plurality of insertion holes in an axial direction; an inner iron core placed radially inside the outer iron core and configuring an inner peripheral portion connected to the shaft; a dielectric layer disposed radially inside the outer iron core and radially outside the inner iron core, wherein the dielectric layer is formed of insulating resin so as to continuously surround the inner iron core and fixes the outer and inner cores together while electrically insulating one core from the other; and permanent magnets inserted individually in the plurality of insertion holes.