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:
Apr. 19, 2005
Filed:
Sep. 26, 2003
Robert John Nelson, Orlando, FL (US);
Aleksandar Prole, Winter Springs, FL (US);
Stephen W. Cates, Oviedo, FL (US);
Abraham Nieves, Orlando, FL (US);
Robert John Nelson, Orlando, FL (US);
Aleksandar Prole, Winter Springs, FL (US);
Stephen W. Cates, Oviedo, FL (US);
Abraham Nieves, Orlando, FL (US);
Siemens Westinghouse Power Corporation, Orlando, FL (US);
Abstract
Methods and systems consistent with the present invention provide improved online detection of one or more shorts in rotor turns () of a field winding () of an electric generator. An initial reference inductance Lis determined by an impedance-measuring circuit (). A subsequent inductance L is determined by the impedance measuring circuit (). A data processing system () compares Lto L to determine whether they differ by a predetermined amount. If Land L differ by the predetermined amount, an alarm is provided to operators to indicate the presence of one or more shorted rotor turns.