Permanent magnet and reluctance type rotating machine

U.S. Patent Number: 6329734

Abstract: A permanent magnet-reluctance type rotating machine includes an annular stator having armature windings arranged on an inner periphery of the stator, a rotor rotatably arranged inside the stator and a plurality of permanent magnets disposed in a rotor core. One permanent magnet defining each pole is divided into two magnet pieces in a direction parallel to the magnetizing direction of the permanent magnets. Owing to the division of the magnet, the mass of each permanent magnet becomes small in comparison with that of the conventional machine, so that the centrifugal force applied on the magnet holes can be reduced. Consequently, the stress generating in the rotor core is decreased to allow the rotating machine to rotate at a higher speed.

Inventors: Takahashi; Norio (Yokohama, JP), Sakai; Kazuto (Yokosuka, JP), Hashiba; Yutaka (Yokosuka, JP), Arata; Masanori (Yokohama, JP), Tsutsui; Hirotsugu (Mie-ken, JP)

Assignee: Kabushiki Kaisha Toshiba (Kawasaki, JP)

Application Number: 09/510,675

Issued: 2001-12-11

Expired: 2005-12-11

Classes: 310/156.56 ; 310/156.07; 310/156.39; 310/156.57; 310/162; 310/261

Field of search: 310/156,261,162 318/701

Click the image above to view patent images at uspto.gov within a frame.

Click here for the fulltext page on uspto.gov within a frame.