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:
Mar. 26, 2002
Filed:
Nov. 24, 1999
Franklin Timothy Emery, Ft. Payne, AL (US);
Siemens Westinghouse Power Corporation, Orlando, FL (US);
Abstract
A method and apparatus are provided to increase compressive creep capabilities of high voltage coil insulation. The method preferably includes applying at least one layer of a first tape as a groundwall insulation to substantially the entire length of a high voltage coil. The first tape preferably has a first predetermined amount of resin therein. The method also includes curing the groundwall insulation for a first predetermined time period, applying at least one layer of a second tape as a protective armor overlying the groundwall insulation only to end portions of the high voltage coil after the first predetermined time period. the second tape preferably includes substantially more resin than the first tape. The method further includes curing the protective armor for a second predetermined time period. The apparatus preferably includes a high voltage coil having a predetermined length, at least one layer of resin impregnated tape overlying the high voltage coil along substantially the entire predetermined length thereof and defining groundwall insulation, and at least one layer of resin rich (RR) tape overlying the groundwall insulation only along end portions of the coil to define a protective armor. The RR tape of the protective armor being impregnated with substantially more resin than the resin impregnated tape of the groundwall insulation.