Electrical generator an aero-engine including such a generator, and an aircraft including such a generator
First Claim
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1. An electrical generator for use with a gas turbine engine having a low speed spool, wherein the generator is driven from the low speed spool, in which the generator is a switched reluctance generator permanently coupled to the low speed spool via a step up gear box.
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Abstract
An aero-engine is provided with an integrated switched reluctance generator permanently connected to the low speed spool of the engine such that “windmilling” of the engine enables the generator to be turned if the engine suffers a flame out. The generator is driven by a step up gearbox so as to provide reasonable electrical output, say 25 kW, during flameout whilst keeping the generator weight down.
186 Citations
17 Claims
- 1. An electrical generator for use with a gas turbine engine having a low speed spool, wherein the generator is driven from the low speed spool, in which the generator is a switched reluctance generator permanently coupled to the low speed spool via a step up gear box.
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10. An aircraft having a plurality of switched reluctance generators, in which the generators are arranged to deliver power to an aircraft electrical distribution system in order to supply power to aircraft systems including those for controlling aircraft flight surfaces, wherein the flight surfaces are directly driven from electrical motors or wherein the flight surfaces are hydraulically operated and the supply of pressurized hydraulic fluid is derived from an electrically driven pump, and in which at least one of the generators is in combination with a gas turbine engine and is permanently connected via a step up gear box to a low speed spool of said engine such that, in the event of flame out of said engine, the airflow though said engine whilst said aircraft is in flight generates sufficient power to actuate the flight control surfaces.
- 11. An electrical generator for use with a gas turbine engine of an aircraft, wherein the generator is a switched reluctance generator permanently drivingly coupled to the low speed spool of the gas turbine engine via step up gearbox such that, the generator supplies electrical power for aircraft systems when the gas turbine engine is windmilling.
Specification