Abstract: A wind turbine includes a main shaft rotatable around a rotation axis. The main shaft includes a first piece axially extending along the rotation axis, at least a second piece axially extending along the rotation axis, the second piece being axially adjacent to the first piece, a plurality of connections for fixing the second piece to the first piece.

Abstract: A stator assembly is provided including (a) an inner frame structure having an annular shape with an inner circumferential edge and an outer circumferential edge, wherein the inner frame structure is formed around a center axis corresponding to an axial direction of the electric generator; and (b) an outer frame structure, which surrounds the inner frame structure and which, starting from the outer circumferential edge, includes two inclined annular walls which, along a radial direction, spread apart from each other such that in between a first inclined annular wall and the second inclined annular wall there is formed an accommodation space. Preferably, the inner frame structure and the outer frame structure are made from a single piece.

Abstract: An electric generator is provided including a stator assembly, a rotor assembly being rotatably supported at the stator assembly for rotating around a rotational axis, an annular device being fixed to the rotor assembly and including an engagement structure, and a first turning device being mounted to the stator assembly, the first turning device including an actuator and an engagement element being drivable by the actuator. The first turning device is configured for adopting two operational states, an active operational state and a passive operational state. In the active operational state there is an engagement between the engagement element and the engagement structure and in the passive operational state the engagement element and the engagement structure are mechanically decoupled from each other.

Abstract: A stator assembly includes a stator frame structure having an outer annular frame with an outer edge running around a center axis; a plurality of stator segments mounted at the outer edge along a circumferential direction of the outer edge, each stator segment comprising at least one electric coil; and a wiring arrangement electrically connecting the stator segments with an electric power interface. The wiring arrangement comprises a plurality of wiring assemblies, each wiring assembly electrically connecting one of the plurality of stator segments with the power interface is provided. Each wiring assembly is routed along and next to the outer annular frame and comprises electric cables connected in between the electric interface and the respective stator segment, wherein the electric cables are provided with electric insulation structures each surrounding one of the electric cables. Further described is an electric generator and a wind turbine with such a stator assembly.

Abstract: Provided is a wind turbine, including a rotor with a rotor shaft connected to a generator and a bearing housing, whereby the bearing housing includes at least a first bearing group and a second bearing group each comprising at least a primary bearing setup and a secondary bearing setup in which bearing is receivable, whereby the rotor shaft is rotatably arranged by the primary bearing setups or the secondary bearing setups.

Abstract: A bearing arrangement of an electrical machine is provided that includes a drive shaft extending through a housing, the bearing arrangement including a front-end bearing arranged about a front end of the drive shaft, and a back-end bearing arranged about an opposite end of the drive shaft, wherein a bearing includes a plurality of bearing pads arranged in an annular space between the drive shaft and the housing, and wherein at least one bearing includes an uneven distribution of bearing pads about the drive shaft. Furthermore, a wind turbine including such a bearing arrangement is also provided.

Abstract: A wind turbine includes a main shaft rotatable around a rotation axis. The main shaft includes a first piece axially extending along the rotation axis, at least a second piece axially extending along the rotation axis, the second piece being axially adjacent to the first piece, a plurality of connections for fixing the second piece to the first piece.

Abstract: A bearing arrangement of an electrical machine is provided that includes a drive shaft extending through a housing, the bearing arrangement including a front-end bearing arranged about a front end of the drive shaft, and a back-end bearing arranged about an opposite end of the drive shaft, wherein a bearing includes a plurality of bearing pads arranged in an annular space between the drive shaft and the housing, and wherein at least one bearing includes an uneven distribution of bearing pads about the drive shaft. Furthermore, a wind turbine including such a bearing arrangement is also provided.

Abstract: A stator assembly includes a stator frame structure having an outer annular frame with an outer edge running around a center axis; a plurality of stator segments mounted at the outer edge along a circumferential direction of the outer edge, each stator segment comprising at least one electric coil; and a wiring arrangement electrically connecting the stator segments with an electric power interface. The wiring arrangement comprises a plurality of wiring assemblies, each wiring assembly electrically connecting one of the plurality of stator segments with the power interface is provided. Each wiring assembly is routed along and next to the outer annular frame and comprises electric cables connected in between the electric interface and the respective stator segment, wherein the electric cables are provided with electric insulation structures each surrounding one of the electric cables. Further described is an electric generator and a wind turbine with such a stator assembly.

Abstract: A stator assembly is provided including (a) an inner frame structure having an annular shape with an inner circumferential edge and an outer circumferential edge, wherein the inner frame structure is formed around a center axis corresponding to an axial direction of the electric generator; and (b) an outer frame structure, which surrounds the inner frame structure and which, starting from the outer circumferential edge, includes two inclined annular walls which, along a radial direction, spread apart from each other such that in between a first inclined annular wall and the second inclined annular wall there is formed an accommodation space. Preferably, the inner frame structure and the outer frame structure are made from a single piece.

Abstract: An electric generator is provided including a stator assembly, a rotor assembly being rotatably supported at the stator assembly for rotating around a rotational axis, an annular device being fixed to the rotor assembly and including an engagement structure, and a first turning device being mounted to the stator assembly, the first turning device including an actuator and an engagement element being drivable by the actuator. The first turning device is configured for adopting two operational states, an active operational state and a passive operational state. In the active operational state there is an engagement between the engagement element and the engagement structure and in the passive operational state the engagement element and the engagement structure are mechanically decoupled from each other.

Abstract: An outer rotor construction for a wind turbine generator which outer rotor construction comprises a plurality of rotor housing segments, wherein a rotor housing segment is realized to hold a number of magnet poles, and wherein a rotor housing segment comprises a lateral connecting interface of a lateral connection for detachably connecting that rotor housing segment along its longitudinal length to a number of adjacent rotor housing segments. The invention further describes a wind turbine including a generator, which generator includes an inner stator and such an outer rotor is provided. A method of performing a maintenance procedure on such an outer rotor construction is also provided.

Abstract: An electric generator arrangement with a stator being equipped with at least two opposed phase windings, each winding comprising at least two sub-windings in series is provided. The arrangement also comprises a controlled varistor across the connections of the sub-windings of said opposed phase windings. A current imbalance between two opposed phase windings is measured and the varistor is controlled in such a way that the resistance of the varistor is increased when the current imbalance increases.

Abstract: A generator for a wind turbine is proposed. The generator has a stator, a rotor having a rotor housing surrounding the stator, and a main bearing to support the rotor housing such that the rotor housing is rotatable about an axis of rotation. The stator has a plurality of cylindrical elements extending in parallel with the axis of rotation, and the rotor has a front element having a plurality of holes at positions alignable with the cylindrical elements, such that the rotor is fixable to the stator by inserting a fastening member through a cylindrical element and a hole aligned with the cylindrical element.

Abstract: A cooling support element for a stator segment of an electrical machine is provided. The cooling support element has a first and a second plate each having an upper surface and a lower surface. The upper surface of the first plate has anchoring element for anchoring a stator lamination stack attached to the cooling support element. The lower surface of the second plate has an inlet and an outlet opening. The two plates are attached to each other. The lower surface of the first plate faces the upper surface of the second plate. Separator elements are disposed between the lower surface of the first plate and the upper surface of the second plate for providing a cooling channel. A cooling fluid is guidable from the inlet opening through the cooling channel to the outlet opening for dissipating heat from the stator lamination stack.

Abstract: An outer rotor construction for a wind turbine generator which outer rotor construction comprises a plurality of rotor housing segments, wherein a rotor housing segment is realized to hold a number of magnet poles, and wherein a rotor housing segment comprises a lateral connecting interface of a lateral connection for detachably connecting that rotor housing segment along its longitudinal length to a number of adjacent rotor housing segments. The invention further describes a wind turbine including a generator, which generator includes an inner stator and such an outer rotor is provided. A method of performing a maintenance procedure on such an outer rotor construction is also provided.

Abstract: An electric generator arrangement with a stator being equipped with at least two opposed phase windings, each winding comprising at least two sub-windings in series is provided. The arrangement also comprises a controlled varistor across the connections of the sub-windings of said opposed phase windings. A current imbalance between two opposed phase windings is measured and the varistor is controlled in such a way that the resistance of the varistor is increased when the current imbalance increases.

Abstract: A generator for a wind turbine is proposed. The generator has a stator, a rotor having a rotor housing surrounding the stator, and a main bearing to support the rotor housing such that the rotor housing is rotatable about an axis of rotation. The stator has a plurality of cylindrical elements extending in parallel with the axis of rotation, and the rotor has a front element having a plurality of holes at positions alignable with the cylindrical elements, such that the rotor is fixable to the stator by inserting a fastening member through a cylindrical element and a hole aligned with the cylindrical element.

Abstract: A cooling support element for a stator segment of an electrical machine is provided. The cooling support element has a first and a second plate each having an upper surface and a lower surface. The upper surface of the first plate has anchoring element for anchoring a stator lamination stack attached to the cooling support element. The lower surface of the second plate has an inlet and an outlet opening. The two plates are attached to each other. The lower surface of the first plate faces the upper surface of the second plate. Separator elements are disposed between the lower surface of the first plate and the upper surface of the second plate for providing a cooling channel. A cooling fluid is guidable from the inlet opening through the cooling channel to the outlet opening for dissipating heat from the stator lamination stack.