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:
Aug. 16, 2011
Filed:
Jun. 19, 2009
Peter K. Beardsley, Derby, GB;
Peter K. Beardsley, Derby, GB;
Rolls-Royce PLC, London, GB;
Abstract
A turbine engine arrangement includes an electrical machine that acts as a generator or motor. During initial start-up, the electrical machine acts as the motor to drive shaft rotation. The arrangement includes a compressor fan that generates an airflow utilized by an air turbine to drive the electrical machine as a generator. A duct directs airflow exhausted from the air turbine to a heat exchanger to exchange heat with a bypass flow from the compressor fan. In such circumstances, the generator can operate substantially independently of a rotational speed of the engine shafts within the core, whilst bled air through the valve acts to cool the electrical machine during initial start-up. A gearbox is provided for matching air turbine rotation with generator requirements whilst also allowing for connection to the primary drive shaft of the core to allow engine start-up or driving of the generator.