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:
Jul. 31, 2001
Filed:
Mar. 29, 2000
Mikio Takabatake, Yokohama, JP;
Masanori Arata, Yokohama, JP;
Kazuto Sakai, Yokosuka, JP;
Yutaka Hashiba, Yokosuka, JP;
Yoshio Hashidate, Fujisawa, JP;
Norio Takahashi, Yokohama, JP;
Koji Oishi, Mie-Ken, JP;
Shiro Amemori, Yokohama, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A rotor is provided for a permanent magnet type rotating machine having a stator,with armature windings,. The rotor,includes a rotor core,and a plurality of permanent magnets,arranged in the rotor core,so as to negate magnetic flux of the armature windings,passing through interpoles,. The rotor,is constructed so that the average of magnetic flux in an air gap,between the rotor,and the stator,, which is produced by the permanent magnets,at the armature windings' de-energized, ranges from 0.1 [T] to 0.7 [T] and the ratio (Lq/Ld) of self-inductance of the magnetic portion in a hard-magnetizing direction (q-axis) to self-inductance in an easy-magnetizing direction (d-axis) under a rated load condition ranges from 0.1 to 0.8. Under these conditions, it is possible to realize the rotating machine which operates as an induction machine at the machine's starting and also operates as an synchronous machine at the rated driving due to smooth pull-in.