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1. WO2010081560 - GENERATOR, NACELLE, AND MOUNTING METHOD OF A NACELLE OF A WIND ENERGY CONVERTER

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CLAIMS

1. A nacelle of a wind energy converter comprising:

a main frame (10; 10a, 10b);

a generator (30a, 30b) including a stator (30a) and a rotor (30b);

a generator housing (20; 20') attached to the main frame

(10; 10a, 10b) and at least partially enclosing the stator (30a) and a rotor space (21) ;

wherein the generator housing (20; 20') has a first side face (Sl);

wherein the first side face (Sl) of the generator housing (20; 20') exposes the rotor space (21); and

a flange (40) rotatably supported on the main frame (10;

10a, 10b) and including a first end (El) which is connected to the rotor (30b) ;

wherein the rotor (30b) extends into the rotor space (25) from the first side face (Sl) without being supported in the generator housing (20; 20').

2. The nacelle of claim 1, wherein the flange (40) includes a second end (E2) which is connected to a hub (50) for at-taching rotor blades.

3. The nacelle of claim 1 or 2 , wherein the generator housing (20; 20') is of substantially cylindrical shape, and preferably of cylindrical cup shape.

4. The nacelle of one of the preceeding claims, wherein the generator housing (20; 20') has a second side face (S2) opposite to the first side face (Sl) .

5. The nacelle of claim 4, wherein the second side face (S2) includes at least one opening (24) .

6. The nacelle of one of the preceeding claims, wherein the main frame (10; 10a, 10b) is form-closed with an outer sur-face of the generator housing (20; 20') .

7. The nacelle of one of the preceeding claims, wherein the main frame (10; 10a, 10b) includes a first part (10a) and a second part (10b) which are releasably connected with each other and embrace the generator housing (20; 20').

8. The nacelle of one of the preceeding claims, wherein the flange (40) has a Y-shaped cross-section.

9. The nacelle of one of the preceeding claims, wherein an air gap (25) between the stator (30a) and the rotor (30b) is at least 1 cm, and preferably between 1 cm and 5 cm.

10. The nacelle of one of the preceeding claims, wherein at least one of the stator (30a) and the rotor (30b) includes a superconducting means .

11. A mounting method of a nacelle of a wind energy converter comprising the steps of:

mounting a first part (10a) of a main frame (10; 10a, 10b) on a tower ( 2 ) ;

mounting a rotatably supported flange (40) which includes a first end (El) on the first part (10a) of the main frame (10; 10a, 10b);

providing a generator housing (20; 20') at least partially enclosing a stator (30a) and a rotor space (21), wherein the generator housing (20; 20') has a first and second side face (Sl, S2), and wherein the first side face (Sl) of the generator housing (20; 20') exposes the rotor space (21);

providing spacers (47) in the rotor space (21);

inserting a rotor (30b) into the rotor space (21) such that the spacers (47) are positioned between the rotor (30b) and the stator (30a) ;

mounting the generator housing (20; 20') including the inserted rotor (30b) on the first part (10a) of the main frame (10; 10a, 10b) ;

connecting the first end (El) of the flange (40) to the rotor (30b) ; and

removing the spacers (47) such that the rotor (30b) extends into the rotor space (25) from the first side face (Sl) without being supported in the generator housing (20; 20') .

12. The method of claim 11, wherein a second part (10b) of the main frame (10; 10a, 10b) is mounted such that the first and second part (10a, 10b) embrace the generator housing (20; 20' ).

13. The method of claim 11 or 12, wherein the flange (40) includes a second end (E2) and further comprising the step of connecting the second end (El) to a hub (50) for attaching rotor blades .

14. The method of one of claims 11 to 13, wherein the step of mounting the flange (40) comprises the steps of mounting a bearing (45) supported by a bearing housing (46) on the first part (10a) of the main frame (10; 10a, 10b) .

15. A generator (30a, 30b) comprising:

a stator (30a) and a rotor (30b);

a generator housing (20; 20') at least partially enclosing the stator (30a) and a rotor space (21) ;

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wherein the generator housing (20; 20') has a first and second side face (Sl, S2);

wherein the first side face (Sl) of the generator housing (20; 20') exposes the rotor space (21); and

wherein the rotor (30b) extends into the rotor space (25) from the first side face (Sl) without being supported in the generator housing (20; 20').

16. The generator of claim 15, wherein the generator housing (20; 20') is of substantially cylindrical shape, and preferably of cylindrical cup shape.

17. The generator of claim 15 or 16, wherein the generator housing (20; 20') has a second side face (S2) opposite to the first side face (Sl) .

18. The generator of claim, wherein the second side face (S2) includes at least one opening (24) .

19. The generator of one of claims 15 to 18, wherein an air gap (25) between the stator (30a) and the rotor (30b) is at least 1 cm, and preferably between 1 cm and 5 cm.

20. The generator of one of claims 15 to 19, wherein at least one of the stator (30a) and the rotor (30b) includes a superconducting means .

21. The generator of one of claims 15 to 20, wherein a cooling means (100a, 100b) is provided in the generator housing (20; 20' ).

22. The generator of one of claims 15 to 21, wherein a sensor means (101a, 101b) is provided in the generator housing (20; 20' ).

23. A nacelle of a wind energy converter comprising:

a main frame;

a generator including a stator and a rotor;

a generator housing attached to the main frame and at least partially enclosing the stator and a rotor space;

a flange rotatably supported on the main frame and including a first end which is connected to the rotor;

wherein the rotor extends into the rotor space without being supported in the generator housing.

24. The nacelle of claim 23, wherein the flange includes a second end which is connected to a hub for attaching rotor blades .

25. The nacelle of claim 23, wherein the generator housing is of substantially cylindrical shape.

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26. The nacelle of claim 25, wherein the generator housing is of cylindrical cup shape.

27. The nacelle of claim 23, wherein the generator housing includes a first side face, the first side face exposing the rotor space.

28. The nacelle of claim 27, wherein the generator housing includes a second side face opposite to the first side face, the second side face including at least one opening.

29. The nacelle of claim 23, wherein the main frame is form-closed with an outer surface of the generator housing.

30. The nacelle of claim 23, wherein the main frame includes a first part and a second part which are releasably connected with each other and which embrace the generator housing.

31. The nacelle of claim 23, wherein an air gap between the stator and the rotor is at least 1 cm.

32. The nacelle of claim 31, wherein the air gap between the stator and the rotor is between 1 cm and 5 cm.

33. The nacelle of claim 23, wherein at least one of the stator and the rotor includes a superconductor.

34. A mounting method of a nacelle of a wind energy con-verter comprising the steps of: mounting a first part of a main frame on a tower;

mounting a rotatably supported flange which includes a first end on the first part of the main frame;

providing a generator housing enclosing a stator and a rotor space;

providing spacers in the rotor space;

inserting a rotor into the rotor space such that the spacers are positioned between the rotor and the stator;

mounting the generator housing including the inserted rotor on the first part of the main frame;

connecting the first end of the flange to the rotor; and

removing the spacers such that the rotor extends into the rotor space without being supported in the generator housing.

35. The method of claim 34, wherein a second part of the main frame is mounted such that the first and second parts embrace the generator housing.

36. The method of claim 34, wherein the flange includes a second end and further comprising the step of connecting the second end to a hub for attaching rotor blades.

37. The method of claim 34, wherein the step of mounting the flange includes mounting a bearing supported by a bearing housing on the first part of the main frame.

38. A generator comprising:

a stator;

a rotor; and

a generator housing at least partially enclosing the stator and a rotor space;

wherein the rotor extends into the rotor space without being supported in the generator housing.

39. The generator of claim 38, wherein the generator housing is of substantially cylindrical shape.

40. The generator of claim 39, wherein the generator housing is of cylindrical cup shape.

41. The generator of claim 38, wherein the generator hous-ing includes a first side face, the first side face exposing the rotor space.

42. The generator of claim 41, wherein the generator housing includes a second side face opposite to the first side face, the second side face including at least one opening.

43. The generator of claim 38, wherein an air gap between the stator and the rotor is at least 1 cm.

44. The generator of claim 43 , wherein the air gap between the stator and the rotor is between 1 cm and 5 cm.

45. The generator of claim 38, wherein at least one of the stator and the rotor includes a superconductor.

46. The generator of claim 38, wherein a cooling system is provided in the generator housing.

47. The generator of claim 38, wherein a sensor is provided in the generator housing.