Patent ID: 8076812
Filing Date: 2011-12-13
Classification: H02K

Abstract:
1. A magnet-embedded rotor in a motor in which planar permanent magnets are circumferentially arranged at regular intervals in a cylindrical rotor core, in which electrolytic galvanized iron plates are laminated on one another, with outer circumferential surfaces of the permanent magnets being arranged so as to become alternating poles of N and S, wherein the permanent magnets have a 3-part arrangement including a center magnet and two side magnets, a width of a polar surface of each side magnet being smaller than that of the center magnet, and the arrangement is constituted such that the magnets are embedded in the rotor core so as to be parallel with a tangential line thereof, a width between both poles of the center magnet is smaller than those of the side magnets, and a volume of the pole-front side core from an outer circumference of the rotor core to a polar surface of the center magnet is increased so that the respective polar surfaces of the side magnets are inclined towards the center magnet.