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. 23, 2014
Filed:
Feb. 24, 2011
Kazuo Nishihama, Hitachinaka, JP;
Hiroyuki Mikami, Hitachinaka, JP;
Tadahiro Shimozono, Bankok, TH;
Keiichiro Kaihatsu, Kamagaya, JP;
Atsushi Abe, Matsudo, JP;
Kazuo Nishihama, Hitachinaka, JP;
Hiroyuki Mikami, Hitachinaka, JP;
Tadahiro Shimozono, Bankok, TH;
Keiichiro Kaihatsu, Kamagaya, JP;
Atsushi Abe, Matsudo, JP;
Hitachi Ltd, Tokyo, JP;
Abstract
An object of the present invention is to provide a squirrel-cage induction motor with high efficiency. In a squirrel-cage induction motor including a stator in which stator windings are wound in a number of stator slots arranged at intervals in the vicinity of the inner periphery of a stator core and a rotor in which rotor conductors are embedded in a number of rotor slots arranged at intervals in the vicinity of the outer periphery of a rotor core and end rings are provided at both ends of the rotor core, the rotor core is formed of a plurality of blocks, an annular short-circuit ring is provided between respective blocks of the rotor core to short-circuit the rotor conductors, and laminated thickness of the rotor core is made larger than laminated thickness of the stator core.