The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 15, 1998
Filed:
Apr. 27, 1995
Applicant:
Inventors:
Kazuto Sakai, Tokyo, JP;
Yutaka Tabuchi, Tokyo, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02K / ;
U.S. Cl.
CPC ...
310214 ; 310154 ; 310156 ; 310254 ; 310261 ;
Abstract
A permanent magnet type rotating machine includes a stator core provided on an inner periphery thereof with armature windings, a rotor core, a plurality of permanent magnets arranged on an outer periphery of the rotor core, and a magnetic ring arranged between the permanent magnets and a stator. The magnetic flux running from the permanent magnets to the stator core through a gap, can be increased by a reduction in magnetic reluctance due to the magnetic ring inserted between the gap and the permanent magnets. The magnetic ring is fitted on either one of the outer peripheries of the permanent magnets and the inner periphery of the stator core.