IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0228851
(2005-09-16)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
인용정보 |
피인용 횟수 :
87 인용 특허 :
32 |
초록
▼
A wind energy conversion system includes upper and lower wind turbines having counter-rotating blade assemblies supported for rotation about a vertical rotation axis, with each blade assembly carrying a rotor for rotation past a stator to produce an electrical output. The wind turbines are supported
A wind energy conversion system includes upper and lower wind turbines having counter-rotating blade assemblies supported for rotation about a vertical rotation axis, with each blade assembly carrying a rotor for rotation past a stator to produce an electrical output. The wind turbines are supported by a tower at an elevated position above the ground. Each wind turbine produces torque, and the wind energy conversion system provides for balancing the torques to avoid a net torque on the tower. Adjustment mechanisms are provided for adjusting blade pitch and for adjusting the size of an air gap between a stator and a rotor that comes into alignment with the stator as the rotor rotates therepast. The wind energy conversion system provides a hood for supplying intake air to a wind turbine and an exhaust plenum for exhausting air from the wind turbine, with the hood and the exhaust plenum being directionally positionable.
대표청구항
▼
What is claimed is: 1. A wind energy conversion system comprising a wind turbine comprising a stator, a blade assembly mounted for rotation about a rotation axis in response to air flow through said wind turbine, and a rotor carried by said blade assembly for rotation past said stator to produce an
What is claimed is: 1. A wind energy conversion system comprising a wind turbine comprising a stator, a blade assembly mounted for rotation about a rotation axis in response to air flow through said wind turbine, and a rotor carried by said blade assembly for rotation past said stator to produce an electrical output, said stator including a stator coil, said rotor including a permanent magnet, said blade assembly carrying said rotor for rotation in a rotational path of movement disposed in a plane perpendicular to said rotation axis, said rotor coming into alignment with said stator as said rotor is rotated in said rotational path of movement, said stator being spaced from said rotor aligned therewith by an air gap having a size corresponding to the size of the separation distance between said stator and said rotor aligned therewith in a direction parallel to said rotation axis; and an air gap adjustment mechanism including a track along which said stator is moved toward and away from said plane of said rotational path of movement to respectively decrease and increase the size of said air gap. 2. A wind energy conversion system comprising a wind turbine comprising a stator, a blade assembly mounted for rotation about a rotation axis in response to air flow through said wind turbine, and a rotor carried by said blade assembly for rotation past said stator to produce an electrical output, said stator including a stator coil, said rotor including a permanent magnet, said blade assembly carrying said rotor for rotation in a rotational path of movement disposed in a plane, said rotor coming into alignment with said stator as said rotor is rotated in said rotational path of movement, said stator being spaced from said rotor aligned therewith by an air gap; and an air gap adjustment mechanism including a track along which said stator is moved toward and away from said plane of said rotational path of movement to respectively decrease and increase the size of said air gap, said air gap adjustment mechanism including a housing mounting said stator coil at a location along said rotational path of movement, said housing being movable along said track, said track mounting said housing for movement of said stator coil along a direction perpendicular to said plane of said rotational path of movement with said stator coil remaining at said location while being moved toward and away from said plane of said rotational path of movement. 3. A wind energy conversion system comprising a wind turbine comprising a stator, a blade assembly mounted for rotation about a rotation axis in response to air flow through said wind turbine, and a rotor carried by said blade assembly for rotation past said stator to produce an electrical output, said stator including a stator coil, said rotor including a permanent magnet, said blade assembly carrying said rotor for rotation in a rotational path of movement disposed in a plane, said rotor coming into alignment with said stator as said rotor is rotated in said rotational path of movement, said stator being spaced from said rotor aligned therewith by an air gap; and an air gap adjustment mechanism including a track along which said stator is moved toward and away from said plane of said rotational path of movement to respectively decrease and increase the size of said air gap, said air gap adjustment mechanism including a housing mounting said stator coil and movable along said track, said track mounting said housing for movement of said stator coil along a direction at an acute angle to said plane of said rotational path of movement with said stator coil moving along said rotational path of movement while being moved toward and away from said plane of rotational path of movement. 4. The wind energy conversion system recited in claim 3 wherein said stator coil is movable automatically along said direction at an acute angle to said plane of said rotational path of movement to increase the size of said air gap in response to increased drag force on said stator coil due to increased rotational speed of said blade assembly, said stator coil being movable automatically along said direction at an acute angle to said plane of said rotational path of movement to decrease the size of said air gap in response to decreased drag force on said stator coil due to decreased rotational speed of said blade assembly. 5. The wind energy conversion system recited in claim 4 wherein said air gap adjustment mechanism further comprises a resilient restraining member applying a force on said stator coil in opposition to increased drag force on said stator coil. 6. The wind energy conversion system recited in claim 5 wherein said air gap adjustment mechanism further comprises a strain gauge for monitoring torque produced by said wind turbine. 7. A wind energy conversion system comprising an upper wind turbine comprising a stator, a blade assembly mounted for rotation about a rotation axis in response to air flow through said upper wind turbine, and a rotor carried by said blade assembly for rotation past said stator to produce an electrical output, said blade assembly carrying said rotor for rotation in a rotational path of movement disposed in a plane, said rotor coming into alignment with said stator as said rotor is rotated in said rotational path of movement, said stator being spaced from said rotor aligned therewith by an air gap; an air gap adjustment mechanism including a track along which said stator is moved toward and away from said plane of said rotational path of movement to respectively decrease and increase the size of said air gap; a lower wind turbine disposed below said upper wind turbine and comprising a stator, a blade assembly mounted for rotation about said rotation axis in response to air flow through said lower wind turbine, and a rotor carried by said blade assembly of said lower wind turbine for rotation past said stator of said lower wind turbine to produce an electrical output, said blade assembly of said lower wind turbine carrying said rotor of said lower wind turbine in a rotational path of movement disposed in a plane, said rotor of said lower wind turbine coming into alignment with said stator of said lower wind turbine as said rotor of said lower wind turbine is rotated in said rotational path of movement for said lower wind turbine, said stator for said lower wind turbine being spaced from said rotor for said lower wind turbine aligned therewith by an air gap; and an additional air gap adjustment mechanism for said lower wind turbine including a track along which said stator for said lower wind turbine is movable toward and away from said plane of said rotational path of movement for said lower wind turbine to respectively decrease and increase the size of said air gap for lower wind turbine. 8. The wind energy conversion system recited in claim 1 wherein said rotation axis is vertical and further including a tower supporting said wind turbine at an elevated position above the ground. 9. The wind energy conversion system recited in claim 1 wherein said stator is moved along said track in a direction perpendicular to said plane of said rotational path of movement. 10. The wind energy conversion system recited in claim 1 wherein said stator is moved along said track in a direction non-perpendicular to said plane of said rotational path of movement. 11. The wind energy conversion system recited in claim 10 wherein said stator is moved along said track in a direction at an acute angle to said plane of said rotational path of movement.
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