Electromagnetic propeller brake
First Claim
Patent Images
1. A turbine engine system comprising:
- a low-pressure shaft;
a propulsor configured to rotate in response to the low-pressure shaft rotating;
a high-pressure shaft;
a compressor configured to receive air and compress the air;
a combustor configured to mix the compressed air and fuel and combust the mixture;
a turbine configured to expand the combusted mixture to rotate the high-pressure shaft; and
an electrical motor configured to;
generate electrical power in response to the rotation of the propulsor in a first operation mode; and
slow or stop the rotation of the propulsor in a second operation mode, wherein the high-pressure shaft rotates during the first operation mode and the second operation mode.
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Abstract
Techniques are described for using an electrical motor to slow down or stop a propulsor during an operation mode where the engine is to be otherwise running but the speed of the propulsor should be low or the propulsor should be stopped.
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Citations
18 Claims
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1. A turbine engine system comprising:
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a low-pressure shaft; a propulsor configured to rotate in response to the low-pressure shaft rotating; a high-pressure shaft; a compressor configured to receive air and compress the air; a combustor configured to mix the compressed air and fuel and combust the mixture; a turbine configured to expand the combusted mixture to rotate the high-pressure shaft; and an electrical motor configured to; generate electrical power in response to the rotation of the propulsor in a first operation mode; and slow or stop the rotation of the propulsor in a second operation mode, wherein the high-pressure shaft rotates during the first operation mode and the second operation mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of electronic braking in a turbine engine system, the method comprising:
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receiving air and compressing the air; mixing the compressed air and fuel and combusting the mixture; and rotating a high-pressure shaft based on expansion of the combusted mixture, generating, with an electrical motor in a first operation mode, electrical power in response to rotation of a propulsor caused by rotation of a low-pressure shaft; and slowing or stopping, with the same electrical motor in a second operation mode, the propulsor, wherein the high-pressure shaft rotates during the first operation mode and the second operation mode. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A turbine engine system comprising:
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a shaft; a propulsor configured to rotate in response to the shaft rotating; an electrical motor comprising configured to; generate electrical power in response to rotation of the propulsor in a first operation mode; and slow or stop rotation of the propulsor in a second operation mode; and one or more electrical braking loads that are selectively coupled to an output of the electrical motor in the second operation mode and, when coupled, increase a resistance driven by the electrical motor from a first resistance level in the first operation mode to a second resistance level in the second operation mode, wherein increasing the resistance to the second resistance level increases torque needed to rotate a motor rotor of the electrical motor, and wherein an increase in torque needed to rotate the motor rotor of the electrical motor causes the propulsor to slow or stop rotation.
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Specification