IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0524690
(2006-09-21)
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등록번호 |
US-8395288
(2013-03-12)
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발명자
/ 주소 |
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출원인 / 주소 |
- Calnetix Technologies, L.L.C.
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
6 인용 특허 :
50 |
초록
▼
An electrical machine having a centrifugal compressor for producing a fluid flow to cool one or more portions thereof. In one embodiment, the fluid is separated into separate flows, each of the flows flowing through only a portion of an annular gap formed between a rotor and stator of the electrical
An electrical machine having a centrifugal compressor for producing a fluid flow to cool one or more portions thereof. In one embodiment, the fluid is separated into separate flows, each of the flows flowing through only a portion of an annular gap formed between a rotor and stator of the electrical machine. According to some embodiments, the centrifugal compressor pushes a fluid through the electrical machine, whereas, in other embodiments, the centrifugal compressor pulls the fluid through the electrical machine. The centrifugal compressor includes an impeller that is attached to a shaft of the rotor. According to other embodiments, the electrical machine may include longitudinal channels formed between a housing of the electrical machine and the stator. A first flow of the fluid travels through the annular gap, and a second flow travels through the longitudinal channels. The electrical machine may also include a damper disposed in the longitudinal channels.
대표청구항
▼
1. An apparatus comprising: an electrical machine comprising: a first element;a rotatable element adapted to rotate relative to the first element;a centrifugal impeller coupled to the rotatable element; anda conduit adapted to direct a fluid from an outlet of the centrifugal impeller to at least a p
1. An apparatus comprising: an electrical machine comprising: a first element;a rotatable element adapted to rotate relative to the first element;a centrifugal impeller coupled to the rotatable element; anda conduit adapted to direct a fluid from an outlet of the centrifugal impeller to at least a portion of the electrical machine intermediate a first and second end of the electrical machine, the machine adapted to direct the fluid in substantially opposed directions towards the first and second ends. 2. The apparatus according to claim 1, wherein the centrifugal impeller further comprises a centrifugal compressor. 3. The apparatus according to claim 2, wherein the centrifugal impeller is directly attached to the rotatable element. 4. The apparatus according to claim 1 further comprising: an annular gap formed between the first element and the rotatable element, wherein the conduit communicates with the annular gap. 5. The apparatus according to claim 4, wherein the first element comprises at least one opening formed therethrough providing communication between the centrifugal impeller and the annular gap. 6. The apparatus according to claim 4, wherein the at least one opening is provided at substantially a middle position along the axial length of the first element. 7. The apparatus according to claim 4 further comprising: a manifold formed about a portion of the first element and disposed between an end of the conduit and the at least one opening formed in the first member, wherein the manifold is adapted to direct a fluid substantially around a perimeter of the rotatable element. 8. The apparatus according to claim 7, wherein the conduit is adapted to introduce the fluid into the electrical machine in a direction substantially transverse to an axis of rotation of the rotatable element. 9. The apparatus according to claim 1, wherein the conduit is adapted to introduce the fluid axially into an end of the electrical machine. 10. The apparatus according to claim 9 further comprising: an annular gap formed between the first element and the rotatable element, wherein the conduit communicates with the annular gap. 11. The apparatus according to claim 9 further comprising: at least one axial channel formed along a perimeter of the first element, wherein the conduit communicates with the at least one axial channel. 12. The apparatus according to claim 1 further comprising a damper to throttle a flow of fluid from the centrifugal impeller. 13. The apparatus according to claim 9, wherein the conduit comprises a plurality of axial channels. 14. The apparatus according to claim 1 further comprising one or more magnetic bearings supporting the rotatable element. 15. An electrical device comprising: a stator;a rotor rotatable relative to the stator;a centrifugal impeller coupled to the rotor;an annular channel formed between the stator and the rotor adapted to conduct a fluid therethrough; anda conduit providing communication between the annular channel intermediate opposed ends of the rotor and one of an inlet or an outlet of the centrifugal impeller, the fluid directed towards the opposed ends. 16. The electrical device according to claim 15, wherein the stator comprises one or more openings formed therein and disposed between the conduit and the annular channel. 17. The electrical device according to claim 16, wherein an end portion of the conduit is substantially transverse to the annular channel. 18. The electrical device according to claim 16 further comprising a ring-shaped channel disposed about a perimeter of the stator providing communication between the conduit and the one or more openings formed in the stator. 19. The electrical device according to claim 16, wherein the one or more openings formed in the stator are provided at substantially a middle position along the axial length of the stator. 20. The electrical machine according to claim 15, wherein an opening of the conduit is substantially coaxial with a longitudinal axis of the annular channel. 21. The electrical machine according to claim 15, wherein an end portion of the conduit is substantially parallel with a longitudinal axis of the annular channel. 22. The electrical machine according to claim 15 further comprising at least one longitudinal channel extending along an outer surface of the stator, wherein the at least one longitudinal channel and the conduit are in communication. 23. The electrical machine according to claim 15 further comprising a damper to throttle a flow of the fluid flowing through at least a portion of the electrical machine. 24. The electrical machine according to claim 15, wherein the centrifugal impeller is directly coupled to the rotor. 25. The electrical machine according to claim 15, wherein the centrifugal impeller comprises a centrifugal compressor. 26. The electrical machine according to claim 15, wherein the conduit comprises a plurality of longitudinal channels. 27. The electrical machine according to claim 15 further comprising one or more bearings supporting the rotor. 28. A method for cooling an electrical machine comprising a first element and a rotatable element rotatable relative to the first element, the method comprising: forming a fluid flow with a centrifugal impeller coupled to the rotatable element of the electrical machine;conducting at least a portion of the fluid flow from an output of the centrifugal impeller to a location intermediate opposed ends of the rotatable and through an annular gap formed between the first element and the rotatable element; andconducting the portion of the fluid flow in substantially opposed directions towards the ends of the rotatable element. 29. The method according to claim 28 further comprising: conducting a first portion of the fluid flow through a first length of the annular gap in a first direction;conducting a second portion of the fluid flow through a second length of the annular gap in a second direction; andcombining the first and second portions of the fluid flow at one or more openings formed in the first element along a perimeter thereof. 30. The method according to claim 29 further comprising: conducting the fluid flow through a conduit formed between the one or more openings in the first element and an inlet of the centrifugal impeller. 31. The method according to claim 30 further comprising: directing the fluid flow through a channel formed around a perimeter of the first element between the one or more openings and the conduit. 32. The method according to claim 28 further comprising: conducting the fluid flow through a conduit formed between the an end of the annular gap to an inlet of the centrifugal impeller. 33. The method according to claim 32 further comprising: separating the fluid flow into a first portion and a second portion proximate to a first end of the annular gap;flowing the first portion of the fluid flow through the annular gap;flowing the second portion of the fluid flow through at least one channel formed along an outer surface of the first element; andrecombining the first and second portions of the fluid flow proximate to an opposite end of the annular gap. 34. The method according to claim 28 further comprising: conducting the fluid flow from an output of the centrifugal impeller to a location along an axial length of the annular gap;separating the fluid flow into first and second portions;conducting the first portion of the fluid flow along a first length of the annular gap; andconducting the second portion of the fluid flow along a second length of the annular gap. 35. The method according to claim 34 further comprising: conducting the fluid flow through one or more openings formed in the first element prior to separating the fluid flow into the first and second portions. 36. The method according to claim 28 further comprising: conducting the fluid flow from an output of the centrifugal impeller to the annular gap; andconducting at least a portion of the fluid flow through the annular gap. 37. The method according to claim 28 further comprising: separating the fluid flow into a first and second portion;conducting the first portion through the annular gap; andconducting the second portion through at least one channel formed along an outer surface of the first element. 38. The apparatus of claim 1, wherein the centrifugal impeller further comprises an inlet, the inlet being substantially aligned with a rotational axis of the centrifugal impeller and the outlet being substantially perpendicular to the rotational axis. 39. The apparatus of claim 1, wherein the centrifugal impeller further comprises an inlet, the inlet being substantially perpendicular to a rotational axis of the centrifugal impeller and the outlet being substantially aligned with the rotational axis. 40. The electrical device of claim 15, wherein the inlet of the centrifugal impeller is substantially aligned with a rotational axis of the centrifugal impeller and the outlet is substantially perpendicular to the rotational axis. 41. The electrical device of claim 15, wherein the inlet is substantially perpendicular to a rotational axis of the centrifugal impeller and the outlet is substantially aligned with the rotational axis. 42. The method of claim 28, wherein the fluid flow formed by the centrifugal impeller flows from an outlet of the centrifugal impeller substantially in a direction perpendicularly to a rotational axis of the centrifugal impeller.
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