Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Electric Corporation

Tsuneyoshi Tajima

Tomoaki Oikawa

Osamu Kazama

Masaki Kato

Hiroyuki Akita

Takuhito Miyajima

Kazuhiko Baba

Takahiro Tsutsumi

Toshio Arai

Kouji Masumoto

Koji Masumoto

Masaki Katou

Sadami Okugawa

A stator iron core of an electric motor including plural magnetic pole segments. Each of the pole segments include a back yoke portion, a teeth portion projected from the back yoke portion, a connection portion provided to the back yoke portion for connecting adjacent magnetic pole segments, and a stepped-shaped notch on an outer circumference of the back yoke portion. Further, the stator iron core is circularly formed by bending the connection portions of the plural magnetic pole segments.

Stator iron core of electric motor, manufacturing method thereof, electric motor, and compressor

A stator iron core of an electric motor including plural magnetic pole segments connected and confronted by plural confronting surfaces. Further, two of the confronting surfaces respectively include a V-shaped projection and a V-shaped recess.

To provide a permanent-magnet motor having a permanent magnet which can reduce the vibration and the noise without lowering the efficiency of the motor, the permanent-magnet motor according to, the present invention has a stator 1 having stator winding of plural phases, a rotor having a stator core facing to inside of the stator across a gap part and a permanent magnet provided to the rotor core. In the permanent-magnet motor, the permanent magnet is made to have both a convex part to the inner diameter side and a convex part to the outer diameter side in the cross section taken vertically to the rotation axis, and a focus of magnetic orientation of each magnetic pole of the permanent magnet is located outside of the rotor

Permanent magnet type motor and method of producing permanent magnet type motor

Growing community of inventors

Tokyo, Japan

Tsuneyoshi Tajima