Electrical energy system for barring rotor
AssigneesRolls-Royce North American Technologies Inc., ROLLS-ROYCE plc
InventorsPeter Schenk, Mark Angelo Tanner
Life of this patent
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Abstract
An example system includes an electrical machine electrically configured to generate electrical energy used by one or more components of a gas-turbine engine; an energy storage system; and a controller electrically connected to the energy storage system and configured to receive electrical energy from the energy storage system, wherein, in response to the gas-turbine engine being shut off, the controller is configured to cause the electrical machine to rotate a rotor of the gas-turbine engine using the energy received from the energy storage system.
Claims4
A method comprising:
- detecting, by a controller, shut down of a gas-turbine engine of an aircraft;
- and
- responsive to detecting the shut down of the gas-turbine engine, causing, by the controller, an electrical machine to rotate a rotor of the gas-turbine engine at a speed of less than 100 revolutions per minute using electrical energy sourced from an electrical energy storage system of the aircraft.
A method comprising:
- detecting, by a controller, shut down of a gas-turbine engine of an aircraft;
- and
- responsive to detecting the shut down of the gas-turbine engine, causing, by the controller, an electrical machine to rotate a rotor of the gas-turbine engine using electrical energy sourced from an electrical energy storage system of the aircraft,
- wherein detecting shut down of the gas-turbine engine comprises:
- determining that fuel flow to the gas-turbine engine has been shut off.
A method comprising:
- detecting, by a controller, shut down of a gas-turbine engine of an aircraft;
- responsive to detecting the shut down of the gas-turbine engine, causing, by the controller, an electrical machine to rotate a rotor of the gas-turbine engine using electrical energy sourced from an electrical energy storage system of the aircraft;
- and
- stopping, by power electronics system, the electrical machine causing the rotor to rotate in response to one or more of:
- determining an amount of time after the gas-turbine engine being shut off is above a time threshold;
- determining an engine maintenance switch is activated;
- or
- determining the power stored in the energy storage system falls below an energy threshold.
Dependencies are inferred from the claim text.