Abstract: The present disclosure relates to methods and tools for mounting and/or removing active parts of a stator of an electrical machine, e.g. a generator. The present disclosure also relates to rotors, stators and generators. A method comprises removing one or more active rotor parts of a rotor of an electrical machine when the rotor is in a removal starting position, arranging a replacement tool in a gap left by the removed active rotor parts, rotating the rotor to an alignment position such that the replacement tool is radially aligned with an active stator part to be removed, picking the active stator part to be removed with the replacement tool, rotating the rotor to an extraction position, and removing the active stator part from the rotor.

Abstract: The present disclosure relates to supporting structures for a central frame of a direct-drive wind turbine and methods for managing such structures. A supporting structure is configured to assume a deployed configuration and a stowed configuration. In the stowed configuration, the supporting structure has a shape and size such that the supporting structure can be introduced into the central frame from an outside. In the deployed configuration, the supporting structure has one or more increased dimensions with respect to the stowed configuration, and comprises a working platform.

Abstract: The present disclosure relates to electrical machines comprising a rotor (13), a stator (12) and a radial air gap (39) between the rotor (13) and the stator (12), wherein one of the rotor and stator comprises an endplate driven on one side of the electrical machine, a central support (32) radially surrounding the other of the rotor (13) and stator (12), and a stiffener ring (33) on an opposite side of the electrical machine. The stiffener ring comprises an outer ring (34) connected to the central support (32), and an inner ring (35) connected to the outer ring (34). The outer ring (34) comprises a plurality of removably mounted outer segments (44). The present disclosure further relates to wind turbines and to methods for repairing parts of an electrical machine.

Abstract: The present disclosure relates to supporting structures for a central frame of a direct-drive wind turbine and methods for managing such structures. A supporting structure is configured to assume a deployed configuration and a stowed configuration. In the stowed configuration, the supporting structure has a shape and size such that the supporting structure can be introduced into the central frame from an outside. In the deployed configuration, the supporting structure has one or more increased dimensions with respect to the stowed configuration, and comprises a working platform.

Abstract: The present disclosure relates to methods and tools for mounting and/or removing active parts of a stator of an electrical machine, e.g. a generator. The present disclosure also relates to rotors, stators and generators. A method comprises removing one or more active rotor parts of a rotor of an electrical machine when the rotor is in a removal starting position, arranging a replacement tool in a gap left by the removed active rotor parts, rotating the rotor to an alignment position such that the replacement tool is radially aligned with an active stator part to be removed, picking the active stator part to be removed with the replacement tool, rotating the rotor to an extraction position, and removing the active stator part from the rotor.

Abstract: The present disclosure relates to electrical machines comprising a rotor (13), a stator (12) and a radial air gap (39) between the rotor (13) and the stator (12), wherein one of the rotor and stator comprises an endplate driven on one side of the electrical machine, a central support (32) radially surrounding the other of the rotor (13) and stator (12), and a stiffener ring (33) on an opposite side of the electrical machine. The stiffener ring comprises an outer ring (34) connected to the central support (32), and an inner ring (35) connected to the outer ring (34). The outer ring (34) comprises a plurality of removably mounted outer segments (44). The present disclosure further relates to wind turbines and to methods for repairing parts of an electrical machine.