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. 12, 2013
Filed:
Jun. 13, 2008
David R Trainer, Derby, GB;
John J a Cullen, Derby, GB;
Alan J Mitcham, Ponteland, GB;
Andrew M Cross, Stafford, GB;
Andrew J Forsyth, Manchester, GB;
Ahmed A-m Abdel-hafez, Assint, EG;
David R Trainer, Derby, GB;
John J A Cullen, Derby, GB;
Alan J Mitcham, Ponteland, GB;
Andrew M Cross, Stafford, GB;
Andrew J Forsyth, Manchester, GB;
Ahmed A-M Abdel-Hafez, Assint, EG;
Rolls-Royce PLC, London, GB;
Abstract
A synchronous electrical machine having a plurality of phases, a detecting unit arranged to detect a fault in at least one of the phases of the synchronous electrical machine, an isolating unit arranged to isolate the at least one phase of the synchronous electrical machine with the fault, a phase shift unit arranged to produce a controlled phase shift between the voltage and the current within the remaining phases of the synchronous electrical machine to adjust the phase angle and magnitude of the second harmonic powers produced by the remaining phases of the synchronous electrical machine such that the vector sum of the second harmonic power vectors of the remaining phases of the synchronous electrical machine is zero.