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:
Jan. 03, 1989
Filed:
Jul. 28, 1983
Koichi Sakai, Katsuta, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A salient-pole rotary electric machine comprises a stator including a stator core formed with a plurality of ventilation ducts spaced apart by a predetermined distance in its axial direction and extending in its radial direction, and a stator winding would around the stator core, and a rotor including a rotor shaft, a rotor rim rotatable together with the rotor shaft, a plurality of salient field poles disposed on the outer periphery of the rotor rim in circumferentially spaced apart relation and extending in the axial direction of the rotor rim, and cooling gas passages defined between every adjacent salient field poles. In the rotary electric machine, a closure member is bured in each of the cooling gas passages between the salient field poles to extend from one of the axial ends to the center of the cooling gas passage, and the closure members are disposed between the adjacent salient field poles in a relation alternate with each other in the axial direction of the salient field poles. The alternate arrangement of the closure members reduces the mechanical losses of the salient-pole rotary electric machine and ensures uniform cooling of the stator throughout the axial length of the stator.