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:
Aug. 10, 2004
Filed:
Oct. 04, 2002
Hitachi, Ltd., Tokyo, JP;
Abstract
A rotor structure is to be provided which can diminish stress concentration in teeth-wedge fitting portions located near magnetic poles of a rotor in a rotary electric machine. Teeth have slant faces for abutment against slant faces of wedges to retain the wedges in a fitted state between adjacent teeth, the wedges having slant faces each formed at a predetermined angle relative to the radial direction of a rotor , and a circular arc is formed at each slant face rising position in the teeth . In this case, the radius of the circular arc formed at each slant face rising position in a preset number of teeth located near magnetic pole portions of the rotor is set larger that of the circular arc formed in the remaining teeth.