Mitsubishi Electric Corporation

Hisashi Otsuka

Hiroki Kobayashi

Kenta Ozaki

Shinichi Yamaguchi

Haruyuki Hasegawa

Koki Naka

Kazuyuki Enomoto

Kentaro Horisaka

Kempei Yoshida

Servomotor

A rotor for a permanent magnet motor, includes a magnetic pole portion that includes a magnetic body formed in an annular shape; and a field portion that is disposed adjacent to the magnetic pole portion in an axial direction, that includes a permanent magnet formed in an annular shape and having a multipole structure or a plurality of permanent magnets formed in an annular shape and having a monopole structure and a magnetic body, and that causes a magnetic flux generated by the permanent magnet to flow in the axial direction so as to generate magnetic poles on an outer circumferential surface of the magnetic pole portion.

Rotor for permanent magnet motor having a magnetic pole portion and a field portion

A rotor includes permanent magnets arranged such that magnetic poles of N poles and S poles are arranged alternately in a rotation circumferential direction. The permanent magnets form a plurality of rows in a rotation axis direction. The rotor includes a change section in which arrangements of the magnetic poles change with respect to the rotation axis direction due to the permanent magnets being arranged such that arrangements of the magnetic poles change, in the rotation circumferential direction, between the permanent magnets in the plurality of rows. A stator includes tooth sections opposed to the rotor to surround the rotor, and auxiliary slots each of which is selectively formed at one portion of a front end portion of each tooth section in the rotation axis direction such that substantially a center of the auxiliary slot in the rotation axis direction is opposed to the change section.

Rotary electric machine including auxiliary slot with center opposed to specified rotor portion

Growing community of inventors

Tokyo, Japan

Hisashi Otsuka