IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0343096
(2012-01-04)
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등록번호 |
US-8554433
(2013-10-08)
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발명자
/ 주소 |
- Desabhatla, Sreedhar
- Kamavarapu, Girish
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
0 인용 특허 :
3 |
초록
▼
An apparatus for driving shaft rotation is provided and includes a shaft, which is rotatable about an axis thereof, a machine operably coupled to the shaft to be rotatable with the shaft and configured to be responsive to a load applied thereto and a driving element, which is configured to engage wi
An apparatus for driving shaft rotation is provided and includes a shaft, which is rotatable about an axis thereof, a machine operably coupled to the shaft to be rotatable with the shaft and configured to be responsive to a load applied thereto and a driving element, which is configured to engage with the shaft at a first predefined speed and a second speed greater than the first predefined speed to drive shaft rotation.
대표청구항
▼
1. An apparatus, comprising: a shaft, which is rotatable about an axis thereof;a machine operably coupled to the shaft to be rotatable with the shaft and configured to be responsive to a load applied thereto;a driving element, which is configured to engage with the shaft at a first predefined speed
1. An apparatus, comprising: a shaft, which is rotatable about an axis thereof;a machine operably coupled to the shaft to be rotatable with the shaft and configured to be responsive to a load applied thereto;a driving element, which is configured to engage with the shaft at a first predefined speed of the shaft rotation and at a second speed of the shaft rotation, which is greater than the first predefined speed and associated with a high-speed restart of the machine, to drive shaft rotation,the driving element being controlled to engage with the shaft at the second speed in accordance with:a current rotational speed of the shaft, which is identified by an incremental application of about 2 to about 5% of synchronous motor amps field no load value, anda drive schedule based on excitation trend data that defines an excitation signal for the current rotational speed of the shaft. 2. The apparatus according to claim 1, wherein the first predefined speed is a rated base speed of the driving element and the second speed is a speed above the rated base speed of the driving element. 3. The apparatus according to claim 1, wherein the first predefined speed is a rated turning gear speed of the driving element and the second speed is a speed above the rated turning gear speed of the driving element. 4. The apparatus according to claim 1, wherein the driving element engages with the shaft to drive shaft rotation with one of an acceleration component and a deceleration component. 5. The apparatus according to claim 1, wherein the machine comprises a component of a gas turbine engine. 6. The apparatus according to claim 1, wherein the driving element comprises a synchronous motor. 7. The apparatus according to claim 6, wherein the synchronous motor comprises a load commutated inverter (LCI). 8. The apparatus according to claim 7, further comprising a switch operably interposed between the synchronous motor and the LCI, an open condition of the switch being identifiable during coast down time and the switch being closeable to tap into a kinetic energy in the machine and to achieve a desired deceleration of the machine. 9. An apparatus, comprising: a shaft, which is rotatable about an axis thereof;a machine which is configured as a component of a gas turbine engine and which is operably coupled to the shaft to be rotatable with the shaft and configured to be responsive to a load applied thereto;a driving element, which is configured to engage with the shaft at a first predefined speed of shaft rotation and at a second speed of shaft rotation, which is associated with a high-speed restart of the machine and is greater than the first predefined speed, to drive shaft rotation; anda controller operably coupled to the driving element to control the driving element to engage with the shaft at the second speed in accordance with:a current rotational speed of the shaft, which is identified by an incremental application of about 2 to about 5% of synchronous motor amps field no load value, anda drive schedule based on excitation trend data that defines an excitation signal for the current rotational speed of the shaft. 10. The apparatus according to claim 9, wherein the drive schedule comprises an acceleration component. 11. The apparatus according to claim 9, wherein the drive schedule comprises a deceleration component. 12. The apparatus according to claim 9, wherein the drive schedule is determined from stored excitation data and the current rotational speed of the shaft. 13. The apparatus according to claim 12, wherein the stored excitation data comprises a field current for any given speed. 14. The apparatus according to claim 12, wherein the driving element is configured to identify the current rotational speed of the shaft. 15. A non-transitory computer implemented method for driving shaft rotation, comprising: storing excitation data relating to the driving of a rotation of a shaft, which is rotatable about an axis thereof and coupled to a component of a gas turbine engine that is responsive to a load applied thereto;identifying a current speed of the rotation of the shaft by an incremental application of about 2 to about 5% of synchronous motor amps field no load value;determining a drive schedule defining an excitation signal from the excitation data and the current speed; andapplying the excitation signal to a driving element to thereby control the driving element to engage with the shaft at a first predefined speed of shaft rotation, which is equal to or lower than a rated base speed or a rated turning gear speed of the driving element, and to engage with the shaft at a second speed associated with a high-speed restart greater than the rated base speed or the rated turning gear speed. 16. The method according to claim 15, wherein the drive schedule comprises an acceleration component. 17. The method according to claim 15, wherein the drive schedule comprises a deceleration component. 18. The method according to claim 15, wherein the determining of the drive schedule comprises accessing stored excitation data and the identifying of the current speed. 19. The method according to claim 18, wherein the stored excitation data comprises a field current for any given speed. 20. The method according to claim 18, wherein a controller of the driving element is configured to identify the current speed of the shaft rotation.
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