Rotor hub of a wind turbine, and method for assembling such a rotor hub

1. A method of assembling a wind turbine, the method comprising:

providing a hub housing having a plurality of connecting flanges, each of the plurality of flanges having a flange plane and a through opening and being configured for connection with a respective rotor blade, wherein each of the rotor blades is coupled to a respective pitch drive for rotating the rotor blade, and either:

mounting an arrangement of electrical control devices on a module in such a way that the arrangement forms a structural unit, wherein the arrangement of electrical control devices is configured to control the pitch drives, or

providing a module having an arrangement of electrical control devices for controlling the pitch drives in a form of a structural unit, and

connecting the module to the hub housing using a supporting structure, wherein the arrangement of electrical control devices is fixed to the supporting structure, wherein the module is fixed via the supporting structure from outside the hub housing against a respective one of the plurality of connecting flanges, wherein the supporting structure includes a plurality of supporting struts connected to each other in angular relationship with a central opening, and wherein the plurality of supporting struts is fixed to the hub housing at the respective through opening such that the central opening of the plurality of supporting struts faces the through opening, and wherein the module is accessible from outside the hub housing through the central opening and the through opening; and

connecting the arrangement of electrical control devices to the pitch drives.

2. The method as set forth in claim 1 wherein at each of the plurality of connecting flanges, the hub housing has a blade adaptor, wherein the modules having an arrangement of electrical control devices are mounted to the hub housing before the blade adaptor is mounted to the hub housing.

3. The method as set forth in claim 1 comprising bracing the hub housing by connecting the module.

4. A rotor hub of a wind turbine, comprising:

a hub housing having a plurality of connecting flanges, wherein each of the plurality of connection flanges has a flange plane and a through opening and is configured to be coupled to a respective rotor blade;

a plurality of pitch drives, wherein each of the plurality of pitch drives is configured to rotate a respective rotor blade; and

an arrangement of electrical control devices,

wherein the plurality of pitch drives is connected to the arrangement of electrical control devices, wherein the arrangement of the electrical control devices is configured to control one of the plurality of pitch drives, and

wherein the arrangement of electrical control devices is provided in a module as a structural unit, wherein the module is connected to the hub housing,

wherein the module has a supporting structure, wherein the arrangement of electrical control devices is fixed to the supporting structure, wherein the module is fixed via the supporting structure from outside the hub housing against one of the plurality of connecting flanges,

wherein the supporting structure includes a plurality of supporting struts connected to each other in angular relationship with a central opening and a cross bar extending through the central opening, and wherein the plurality of supporting struts is coupled to an outer surface of a respective connecting flange at the respective through opening such that the central opening of the plurality of supporting struts faces the through opening, and the module is accessible to maintenance personnel from outside the hub housing through the central opening and the through opening.

5. The rotor hub as set forth in claim 4 , wherein the supporting structure is configured to brace the rotor hub in a region of the plurality of connecting flanges.

6. The rotor hub as set forth in claim 4 , wherein the central opening of each of the plurality of supporting struts includes a hatch coupled to the cross bar.