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. 24, 2002
Filed:
Mar. 15, 2001
René-Louis Leyvraz, Lupfig, CH;
Francesco Stallone, Locarno, CH;
Alstom (Switzerland) Ltd, Baden, CH;
Abstract
In a generator with an indirectly gas-cooled, in particular air-cooled, stator winding ( ), the end regions of the stator bore ( ) are to be designed in such a way that the conductor bars are shielded as effectively as possible by the laminated stator core ( ) against magnetic fields inducing eddy currents, but, on the other hand, a specific radial dimension between the rotor retaining ring ( ) and the laminated stator core ( ) is ensured. According to the invention, for this purpose, the end region of the stator bore is designed with four axial zones having a different diameter profile. A first zone (I) is the interior of the stator with the constant nominal stator bore diameter (D ). Toward the end face of the stator is arranged a second zone (II) with a stator bore diameter (D ) widening toward the end face. The stator bore widens, there, to the diameter of a third zone (III) with an at least approximately constant diameter (D ), this diameter, on the one hand, being large enough to ensure a necessary distance from the rotor retaining ring, but continuing to ensure a good overlap over the stator conductor bars by the laminated core.