Meidensha Corporation

Daiki Matsuhashi

Takashi Okitsu

Keisuke Matsuo

Toru Kakebayashi

Mototsugu Omura

Morio Takada

Yukimasa Hisamitsu

The present invention comprises a permanent magnet () that is disposed around a rotor shaft (), a retaining ring () that is press-fitted around the outside of the permanent magnet () from one end of the rotor shaft () so as to retain the permanent magnet () against the rotor shaft (), and an end plate () that is provided adjacent to the permanent magnet () in the axial direction of the rotor shaft () and guides the press-fitted retaining ring (), maintaining planar contact with the inner circumferential surface thereof, toward the permanent magnet () while causing the retaining ring () to expand as the retaining ring () progresses from one end of the rotor shaft () to the other end of the rotor shaft (). Concentration of stress on the retaining ring () during press-fitting can thus be minimized.

Permanent magnet rotor for rotary electric machine

In a rotor structure of a permanent magnet type rotary machine comprising a cylindrical permanent magnetfixed on an outer peripheral surface of a rotor shaft, wherein torque acting on the permanent magnetis transmitted to the rotor shaft, the rotor structure further comprises two annular side platesand a holding ring. Each side plate has an axial holeinto which the rotor shaftis fitted so as to rotate with the side plates integrally and the side platesare attached on the both end surface of the permanent magnet, respectively so as to confront with each other. A circular U-shaped groovecoaxially with the axial holeis provided at a end surfacefor facing with the permanent magnetof each side plate. The holding ringis formed cylindrically and covers circumferential sections of the permanent magnetand the side platesand fasten the permanent magnetand the side platesso as to move them integrally.

Rotor structure of permanent magnet type rotary machine

Growing community of inventors

Tokyo, Japan

Daiki Matsuhashi