Techniques described include refurbishing a rotor of an electric machine such as an electric generator by assembling replacement modular bars in lieu of certain non-modular bars, such as amortisseur bars. The replacement modular bars are provided in different threaded sections based on their location on the rotor, with the sections then threaded onto each other.

A method for repairing an electric generator having a rotor that rotates about a vertical axis, the rotor including a spider having a number of spider arms extending radially away from the axis, and a rim surrounding the spider. The weight of the rim is normally carried at least in part by rim support ledges of the spider arms. The method for repair includes supporting the rim from the top of the spider and thereby relieving some or all of the weight of the rim being supported by the rim support ledges.

A method for repairing an electric generator having a rotor that rotates about a vertical axis, the rotor including a spider having a number of spider arms extending radially away from the axis, and a rim surrounding the spider. The weight of the rim is normally carried at least in part by rim support ledges of the spider arms. The method for repair includes supporting the rim from the top of the spider and thereby relieving some or all of the weight of the rim being supported by the rim support ledges.

An integrated motor disconnect tool is mounted at the base of a motor, which is operationally coupled to a gearbox. The tool facilitates the disconnection of the motor from the gearbox via a series of procedural steps. It features a collar flange with an interior surface concentric to the motor's neutral axis, and includes a set of extraction bolts inserted through apertures located on the top surface of the tool.

An integrated motor disconnect tool is mounted at the base of a motor, which is operationally coupled to a gearbox. The tool facilitates the disconnection of the motor from the gearbox via a series of procedural steps. It features a collar flange with an interior surface concentric to the motor's neutral axis, and includes a set of extraction bolts inserted through apertures located on the top surface of the tool.

A repair device for burnout of a stator iron core in a giant hydraulic turbine generator, and a repair method thereof are provided. The repair device includes toothed plates, ventilation slots, binding holes, ventilation holes, and binding cables. Each of the toothed plates is matched with a burnout area in the middle of the iron core, such that two ends of the toothed plate are in contact with plate assemblies. The binding cables rotatably pass through the binding holes and are pulled tightly to bind the toothed plates and coil bars into an integral structure. The present disclosure solves the problem of influence on the power generation benefit during the flood season due to long re-lamination cycle after burnout of the middle of the stator iron core of the hydraulic turbine generator.

A repair device for burnout of a stator iron core in a giant hydraulic turbine generator, and a repair method thereof are provided. The repair device includes toothed plates, ventilation slots, binding holes, ventilation holes, and binding cables. Each of the toothed plates is matched with a burnout area in the middle of the iron core, such that two ends of the toothed plate are in contact with plate assemblies. The binding cables rotatably pass through the binding holes and are pulled tightly to bind the toothed plates and coil bars into an integral structure. The present disclosure solves the problem of influence on the power generation benefit during the flood season due to long re-lamination cycle after burnout of the middle of the stator iron core of the hydraulic turbine generator.

A coil separation method of separating a coil from a stator including: a stator core having an inner circumferential surface in which a plurality of slots are formed; and the coil placed in the plurality of slots. The coil separation method includes: cutting, from the coil, a coil end portion of the coil protruding from end surfaces of the stator core; and separating the coil from the stator core by pushing cut ends of the coil with a pushing member in a state where teeth of the stator core that are positioned between the slots are supported by a support member.

A coil separation method of separating a coil from a stator including: a stator core having an inner circumferential surface in which a plurality of slots are formed; and the coil placed in the plurality of slots. The coil separation method includes: cutting, from the coil, a coil end portion of the coil protruding from end surfaces of the stator core; and separating the coil from the stator core by pushing cut ends of the coil with a pushing member in a state where teeth of the stator core that are positioned between the slots are supported by a support member.

The present disclosure relates to a rotor of a motor, a method for maintaining the rotor of the motor, the motor and a wind-power electric generator set. The rotor of the motor includes a magnetic yoke, in which the magnetic yoke is in a cylindrical-like shape, and the magnetic yoke is configured to fix a magnet on its circumference surface; and a rotor support, including a shaft connection unit and a supporting ring, in which the shaft connection unit is coaxially connectable to a rotation shaft of a motor, the supporting ring is arranged on an outer periphery of the shaft connection unit, and the magnetic yoke is connected to the supporting ring; herein, at least one of the magnetic yoke and the supporting ring of the rotor support has a structure divided into a plurality of segments in a circumference direction of itself.