IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0821623
(2010-06-23)
|
등록번호 |
US-8115333
(2012-02-14)
|
발명자
/ 주소 |
- Parsche, Francis Eugene
- Seybold, John Steven
|
출원인 / 주소 |
|
대리인 / 주소 |
Allen, Dyer, Doppelt, Milbrath & Gilchrist, P.A.
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
11 |
초록
▼
A wind turbine electrical generator may include a monopole tower extending upwardly from ground level. The wind turbine electrical generator may also include an electrical power generator carried by an upper end of the monopole tower and may include a horizontally extending drive shaft. The wind tur
A wind turbine electrical generator may include a monopole tower extending upwardly from ground level. The wind turbine electrical generator may also include an electrical power generator carried by an upper end of the monopole tower and may include a horizontally extending drive shaft. The wind turbine electrical generator may further include a plurality of wind-driven blades carried by the horizontally extending drive shaft. The monopole tower may have an outer surface with a vertically extending outer corner therein defining a pair of adjacent vertical facets. The monopole tower may be positioned with the vertically extending outer corner aligned with the land-based radar site so that the pair of adjacent vertical facets reflects radar illumination away from the radar site to reduce an amount of the radar illumination reflected back to the land-based radar site.
대표청구항
▼
1. A wind turbine electrical generator comprising: a monopole tower extending upwardly from ground level;an electrical power generator carried by an upper end of said monopole tower and comprising a horizontally extending drive shaft; anda plurality of wind-driven blades carried by said horizontally
1. A wind turbine electrical generator comprising: a monopole tower extending upwardly from ground level;an electrical power generator carried by an upper end of said monopole tower and comprising a horizontally extending drive shaft; anda plurality of wind-driven blades carried by said horizontally extending drive shaft;said monopole tower having an outer surface with a vertically extending outer corner therein defining a pair of adjacent vertical facets, said monopole tower positioned with the vertically extending outer corner aligned with a land-based radar site so the pair of adjacent vertical facets reflects radar illumination away from the land-based radar site to reduce an amount of the radar illumination reflected back to the land-based radar site. 2. The wind turbine electrical generator according to claim 1, further comprising a housing carried by the upper end of said monopole tower and surrounding said electrical power generator; wherein said housing has an outer surface with an outer corner therein defining a pair of adjacent housing facets; and wherein said housing is positioned with the outer corner aligned with the land-based radar site so the pair of adjacent housing facets reflects radar illumination away from the radar site to reduce the amount of the radar illumination reflected back to the land-based radar site. 3. The wind turbine electrical generator according to claim 2, wherein said housing is positioned with the outer corner aligned with the land-based radar site so that neither of the pair of adjacent housing facets is less than 5 degrees from normal to the land-based radar site. 4. The wind turbine electrical generator according to claim 1, further comprising a hub cover coupled to said drive shaft; wherein said hub cover has an outer surface with an outer corner defining a pair of adjacent cover facets; and wherein said hub cover is positioned with the outer corner aligned with the land-based radar site so that the pair of adjacent cover facets reflects radar illumination away from the land-based radar site to reduce the amount of radar illumination reflected back to the land-based radar site. 5. The wind turbine electrical generator according to claim 1, wherein said monopole tower is positioned with the vertically extending outer corner aligned with the land-based radar site so that neither of the pair of adjacent vertical facets is less than 5 degrees from normal to the land-based radar site. 6. A wind turbine electrical generator comprising: a monopole tower extending upwardly from ground level;an electrical power generator carried by an upper end of said monopole tower and comprising a horizontally extending drive shaft;a housing carried by the upper end of said monopole tower and surrounding said electrical power generator; anda plurality of wind-driven blades carried by said horizontally extending drive shaft;said monopole tower having a continuous outer surface with a vertically extending outer corner therein defining a pair of adjacent vertical facets, said monopole tower positioned with the vertically extending outer corner aligned with a land-based radar site so that the pair of adjacent vertical facets reflects radar illumination away from the land-based radar site to reduce an amount of radar illumination reflected back to the land-based radar site;said housing having an outer surface with an outer corner therein defining a pair of adjacent housing facets, said housing positioned with the outer corner aligned with the land-based radar site so that the pair of adjacent housing facets reflects radar illumination away from the land-based radar site to reduce the amount of radar illumination reflected back to the land-based radar site. 7. The wind turbine electrical generator according to claim 6, wherein said monopole tower is positioned with the vertically extending outer corner aligned with the land-based radar site so that neither of the pair of adjacent vertical facets is less than 5 degrees from normal to the land-based radar site. 8. The wind turbine electrical generator according to claim 6, further comprising a hub cover coupled to said drive shaft; wherein said hub cover has an outer surface with an outer corner defining a pair of adjacent cover facets; and wherein said hub cover is positioned with the outer corner aligned with the land-based radar site so that the pair of adjacent cover facets reflects radar illumination away from the land-based radar site to reduce the amount of the radar illumination reflected back to the land-based radar site. 9. A method of positioning a wind turbine electrical generator, the wind turbine comprising a monopole tower extending upwardly from ground level, an electrical power generator carried by an upper end of the monopole tower and comprising a horizontally extending drive shaft, and a plurality of wind-driven blades carried by the horizontally extending drive shaft, the method comprising: positioning the monopole tower having an outer surface with a vertically extending outer corner defining a pair of adjacent vertical facets aligned relative to a land-based radar site so that the pair of adjacent vertical facets reflects radar illumination away from the land-based radar site to reduce an amount of the radar illumination reflected back to the land-based radar site. 10. The method according to claim 9, further comprising positioning a housing having an outer surface with an outer corner defining a pair of adjacent housing facets aligned relative to the land-based radar site so that the pair of adjacent housing facets reflects radar illumination away from the land-based radar site to reduce the amount of radar illumination reflected back to the land-based radar site; and wherein the housing is positioned to surround the electrical power generator. 11. The method according to claim 9, further comprising positioning a hub cover to cover the drive shaft so that a hub cover outer surface with an outer corner defining a pair of adjacent cover facets is aligned with the land-based radar site so that the pair of adjacent cover facets reflects radar illumination away from the land-based radar site to reduce the amount of radar illumination reflected back to the land-based radar site. 12. The method according to claim 9, wherein positioning the monopole tower comprises positioning the monopole tower with the vertically extending outer corner aligned with the land-based radar site so that neither of the pair of adjacent vertical facets is less than 5 degrees from normal to the land-based radar site. 13. A wind turbine electrical generator comprising: a tower extending upwardly from ground level;an electrical power generator carried by an upper end of said tower and comprising a horizontally extending drive shaft; anda plurality of wind-driven composite blades carried by said horizontally extending drive shaft;each of said plurality of wind-driven composite blades comprising a dielectric material and a magnetic material therein having respective properties and in relative proportions so that said composite blade has a relative permittivity and a relative permeability within ±10 percent of each other at a predetermined radar frequency. 14. The wind turbine electrical generator according to claim 13, wherein said magnetic material comprises magnetic particles distributed within said dielectric material. 15. The wind turbine electrical generator according to claim 13, wherein said magnetic material comprises at least one of iron powder and nickel zinc powder. 16. The wind turbine electrical generator according to claim 15, wherein said iron powder comprises carbonyl iron powder. 17. The wind turbine electrical generator according to claim 15, wherein said iron powder comprises an insulation coated iron powder. 18. The wind turbine electrical generator according to claim 15, wherein each particle of said iron powder has a diameter less than or equal to a skin depth at the predetermined radar frequency. 19. The wind turbine electrical generator according to claim 15, wherein said nickel zinc powder comprises nickel zinc spinel powder. 20. The wind turbine electrical generator according to claim 13, wherein said dielectric material comprises fiberglass. 21. The wind turbine electrical generator according to claim 13, wherein said dielectric material comprises carbon fiber. 22. The wind turbine electrical generator according to claim 15, wherein said iron powder is uniformly distributed within said dielectric material. 23. A method of making a wind turbine electrical generator comprising a tower extending upwardly from ground level, an electrical power generator carried by an upper end of the tower and comprising a horizontally extending drive shaft, and a plurality of wind-driven composite blades carried by the horizontally extending drive shaft, the method comprising: forming each of the plurality of wind-driven composite blades from a dielectric material and a magnetic material having respective properties and in relative proportions so that the wind-driven composite blade has a relative permittivity and a relative permeability within ±10 percent of each other at a predetermined radar frequency. 24. The method according to claim 23, wherein the magnetic material comprises magnetic particles distributed within the dielectric material. 25. The method according to claim 23, wherein the magnetic material comprises iron powder. 26. A wind turbine electrical generator comprising: a tower extending upwardly from ground level;an electrical power generator carried by an upper end of said tower and comprising a horizontally extending drive shaft; anda plurality of wind-driven dielectric blades carried by said horizontally extending drive shaft;each of said plurality of wind-driven dielectric blades comprising a dielectric matrix and a plurality of hollow glass bubbles therein having respective properties and in relative proportions so that said wind-driven dielectric blade has a relative permittivity within ±10 percent of the relative permittivity of air. 27. The wind turbine electrical generator according to claim 26, wherein each of said plurality of hollow glass bubbles has a density in a range of between 0.10 and 0.13 grams per cubic centimeter. 28. The wind turbine electrical generator according to claim 26, wherein each of said plurality of hollow glass bubbles has a crush strength of at least 200 pounds per square inch. 29. The wind turbine electrical generator according to claim 26, wherein said plurality of hollow glass bubbles comprise soda-lime-borosilicate hollow glass bubbles. 30. The wind turbine electrical generator according to claim 26, wherein said plurality of hollow glass bubbles is uniformly distributed within said dielectric matrix. 31. The wind turbine electrical generator according to claim 26, wherein said dielectric matrix comprises at least one of fiberglass, carbon fiber, and resin. 32. A method of making a wind turbine electrical generator comprising a tower extending upwardly from ground level, an electrical power generator carried by an upper end of the tower and comprising a horizontally extending drive shaft, and a plurality of wind-driven dielectric blades carried by the horizontally extending drive shaft, the method comprising: forming each of the plurality of wind-driven dielectric blades from a dielectric matrix and a plurality of hollow glass bubbles having respective properties and in relative proportions so that the dielectric blade has a relative permittivity within ±10 percent of air. 33. The method according to claim 32 wherein each of the plurality of hollow glass bubbles has a density in a range between 0.10 and 0.13 grams per cubic centimeter. 34. The method according to claim 32 wherein each of the plurality of hollow glass bubbles has a crush strength of at least 200 pounds per square inch. 35. The method according to claim 32, wherein the plurality of hollow glass bubbles comprises soda-lime-borosilicate hollow glass bubbles. 36. The method according to claim 32, comprising distributing the plurality of hollow glass bubbles uniformly within the dielectric matrix. 37. A wind turbine electrical generator comprising: a tower extending upwardly from ground level;an electrical power generator carried by an upper end of said tower and comprising a horizontally extending drive shaft; anda plurality of wind-driven blades carried by said drive shaft, each comprising a first electrically conductive element extending the length of the wind-driven blade, anda second electrically conductive element extending along at least a portion of the wind-driven blade in spaced relation from said first electrically conductive element and having an end coupled to said first electrically conductive element,said second electrically conductive element having a length and a coupling location with said first electrically conductive element so that said first and second electrically conductive elements cooperate to change an electromagnetic resonance relative to a preselected transmission frequency. 38. The wind turbine electrical generator according to claim 37, wherein said first and second electrically conductive elements are carried by a surface of the wind-driven blade. 39. The wind turbine electrical generator according to claim 37, said first and second electrically conductive elements are embedded in the wind-driven blade. 40. The wind turbine electrical generator according to claim 37, wherein said second electrically conductive element has a shorter length than said first electrically conductive element. 41. The wind turbine electrical generator according to claim 37, wherein each of said plurality of wind-driven blades comprises electrically conductive material. 42. The wind turbine electrical generator according to claim 37, wherein said second electrically conductive element has an L-shape. 43. A method of making a wind turbine electrical generator comprising a tower extending upwardly from ground level, an electrical power generator carried by an upper end of the tower and comprising a horizontally extending drive shaft, and a plurality of wind-driven blades carried by the drive shaft, the method comprising: forming each wind-driven blade to include a first electrically conductive element extending the length thereof; andforming each wind-driven blade to include a second electrically conductive element extending along at least a portion thereof in spaced relation from the first electrically conductive element coupled at an end thereof to the first electrically conductive element;the second electrically conductive element having a length and a coupling location with the first electrically conductive element so that the first and second electrically conductive elements cooperate to change an electromagnetic resonance relative to a predetermined transmission frequency. 44. The method according to claim 43, comprising forming the second electrically conductive element to have a shorter length than the first electrically conductive element. 45. The method according to claim 43, comprising forming the plurality of wind-driven blades of an electrically conductive material. 46. The method according to claim 43, comprising forming the second electrically conductive element in an L-shape.
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