HIGH SPEED DIRECT DRIVE GENERATOR FOR A GAS TURBINE ENGINE

摘要

A motor/generator apparatus for direct coupling to a high rpm, high power shaft is disclosed for one or more of starting and/or extracting power from a gas turbine engine, controlling engine responsiveness, providing a temporary power boost, providing some engine braking and modulating compressor and turbine transient performance as engine power is changed. For example, an axial flux motor/generator configuration is disclosed in which a centrifugal gas compressor rotor is also the rotor of an axial electrical flux motor/generator. In addition, an induction motor/generator is disclosed wherein the rotor of the induction electrical motor/generator is solid and is made of copper-clad steel or titanium. This construction enables both high rpm and high power in a motor/generator that can be directly coupled to the power output shaft of a power turbine of a gas turbine engine.

主权项

1. A gas turbine engine, comprising:
a combustor operable to combust a fuel and air mixture, the combustor having an inlet and an outlet; at least one turbo-compressor spool comprising:
a compressor rotor housing,a compressor rotor positioned within the compressor rotor housing,a turbine rotor housing,a turbine rotor positioned within the turbine rotor housing, anda shaft connecting the compressor rotor and the turbine rotor, the compressor rotor being associated with the combustor inlet and the turbine rotor being associated with the combustor outlet; wherein at least one of the compressor rotor housing and the turbine rotor housing comprises a stator; and wherein at least one of a rear surface of the compressor rotor and a rear surface of the turbine rotor has a layer of copper cladding in proximity to the stator, the stator and the cladded rotor defining an electrical axial flux motor/generator.