Patent ID: 7584600

Claim:
A gas turbine, comprising: a core engine including a high pressure compressor and a shaft connected thereto for driving said high pressure compressor; an electrical power generator connected to the shaft generating electrical power from the shaft, the electrical power generator further including an air turbine receiving compressed air drawn from the high pressure compressor to generate electrical power, the electrical power generator including a first generator and a first coupling apparatus, the first coupling apparatus coupling the first generator to the shaft so that the first generator is capable of generating electrical power from the mechanical shaft power drawn from the core engine via the shaft, the electrical power generator further including a second generator and a second coupling apparatus coupled to the second generator, the second coupling apparatus being arranged and configured such that the second coupling apparatus is capable of removably coupling the second generator to the air turbine in a first operating state and is capable of removably coupling the second generator to the shaft in a second operating state so that the second generator is capable of generating electrical power from the mechanical power generated by the air turbine or alternatively the mechanical shaft power drawn from the core engine via the shaft, the first coupling apparatus being arranged and configured such that the first coupling apparatus is capable of coupling the first generator to the shaft when the second generator is coupled to the air turbine via the second coupling apparatus.