ROTOR OF ELECTRIC MOTOR WITH MAGNETS ATTACHED TO OUTER CIRCUMFERENTIAL SURFACE OF ROTOR CORE, ELECTRIC MOTOR, AND METHOD OF PRODUCING ROTOR OF ELECTRIC MOTOR

摘要

A rotor of the present invention comprises a cylindrically shaped rotor core, and a plurality of magnets arranged at predetermined intervals at an outer circumferential surface of the rotor core. The outer circumferential surface of the rotor core is formed with a plurality of projections for positioning the plurality of magnets in the circumferential direction, and each of the projections extends over only part of outer circumferential surface of the rotor core in the height direction. The rotor core includes a projection-equipped cylindrical part which has an outer circumferential surface over which the plurality of projections extend, and a projection-less cylindrical part which has an outer circumferential surface over which the plurality of projections do not extend.

主权项

1. A rotor of an electric motor, comprising a cylindrically shaped rotor core, and a plurality of magnets which are arranged at predetermined intervals at an outer circumferential surface of said rotor core, wherein
said outer circumferential surface of the rotor core is formed with a plurality of projections for positioning said plurality of magnets in the circumferential direction of said rotor core, each of said plurality of projections extends over only part of said outer circumferential surface of the rotor core in the height direction parallel to the rotation axis of said rotor core, and said rotor core includes a projection-equipped cylindrical part which has an outer circumferential surface over which said plurality of projections extend, and a projection-less cylindrical part which has an outer circumferential surface over which said plurality of projections do not extend.