A conductor bar for a stator winding of a rotating electrical machine includes a bundle of parallel conductor strands extending between two ends of the conductor bar and spaced apart by interspaces. A main insulation is wound around the bundle of conductor strands and a stack separators fills at least part of the interspaces. Protection elements are between the bundle of conductor strands and the main insulation. At least one of the protection elements or the stack separators are configured to compensate, at least in part, thermal expansion of the conductor elements when temperature changes.

A conductor bar for a stator winding of a rotating electrical machine includes a bundle of parallel conductor strands extending between two ends of the conductor bar and spaced apart by interspaces. A main insulation is wound around the bundle of conductor strands and a stack separators fills at least part of the interspaces. Protection elements are between the bundle of conductor strands and the main insulation. At least one of the protection elements or the stack separators are configured to compensate, at least in part, thermal expansion of the conductor elements when temperature changes.

A tooth-wound coil of a stator or of a stator segment of a dynamo-electric machine having two straight sections spaced apart from each other and running substantially parallel. Two 180° curves are located on the ends thereof, wherein the straight sections have an active part area, the axial extend of which is less than or equal to that of the straight section. The tooth-wound coil has a symmetrical extension plane running in the longitudinal direction. An insulation material is provided around the straight sections of the tooth-wound coil. The material effects groove isolation and/or phase isolation in the stator or stator segment.

A tooth-wound coil of a stator or of a stator segment of a dynamo-electric machine having two straight sections spaced apart from each other and running substantially parallel. Two 180° curves are located on the ends thereof, wherein the straight sections have an active part area, the axial extend of which is less than or equal to that of the straight section. The tooth-wound coil has a symmetrical extension plane running in the longitudinal direction. An insulation material is provided around the straight sections of the tooth-wound coil. The material effects groove isolation and/or phase isolation in the stator or stator segment.

A multiple parallel conductor that is easy to produce and use and has a plurality of twisted, insulated individual conductors. The individual conductors are arranged above one another in a plurality of sub-conductor bundles arranged next to one another. A strip is applied to the multiple parallel conductor on a side surface of the multiple parallel conductor in the longitudinal direction of the multiple parallel conductor, on which strip spacer plates are arranged so as to be distributed in the longitudinal direction, and the multiple parallel conductor together with the strip and the spacer plates is wrapped with a wrapping.

The invention provides a corona shielding tape for use to form wound insulation by means of VPI impregnation with a pthalic anhydride-free impregnating epoxy resin. The shielding tape may comprise (1) a carrier tape comprised of a polymeric matrix comprising at least one polyvinyl alcohol derivative compound and having an electrically conductive or semi-conductive filler embedded therein, and (1) an adduct of one or more 1H-imidazole derivatives and one or more acrylates, or (2) a complex compound comprising (a) a metal salt selected from the group consisting of zinc, copper, iron, aluminum, and mixtures thereof, and (b) imidazole and/or pyrazole ligands.

A stator for an electric machine having slots for receiving conductors used for generating a magnetic field; in the slots, at least two mutually parallel, adjoining conductors being provided, which are electrically insulated from one another by insulation means; the insulations means being formed at least partially by a partition inserted between the conductors. It is an object of the present invention to provide a stator, respectively a method for manufacturing such a stator, which, on the one hand, will make it possible to achieve a high fill factor and, on the other hand, to reliably prevent partial discharges. The objective is achieved by the use and/or characteristics of the partitions being a function of the particular maximum voltage potential between the mutually parallel, adjoining conductors in the slots.

A stator for an electric machine having slots for receiving conductors used for generating a magnetic field; in the slots, at least two mutually parallel, adjoining conductors being provided, which are electrically insulated from one another by insulation means; the insulations means being formed at least partially by a partition inserted between the conductors. It is an object of the present invention to provide a stator, respectively a method for manufacturing such a stator, which, on the one hand, will make it possible to achieve a high fill factor and, on the other hand, to reliably prevent partial discharges. The objective is achieved by the use and/or characteristics of the partitions being a function of the particular maximum voltage potential between the mutually parallel, adjoining conductors in the slots.

Provided is a stator coil, including: a coil conductor; a first insulating layer in which a first mica tape is wound and laminated around an outer periphery of the coil conductor; and a second insulating layer in which a second mica tape is wound and laminated around an outer periphery of the first insulating layer, wherein the first mica tape contains mica in a specific content, wherein 60 mass % or more of the mica contained in the first mica tape passes through a JIS standard sieve having a nominal opening of 250 μm, wherein the first mica tape has a specific lamination thickness, and wherein 40 mass % or less of mica contained in the second mica tape passes through the JIS standard sieve having a nominal opening of 250 μm.

The present disclosure relates to electrical machines. The teachings thereof may be embodied in a corona shielding system for an electrical machine. For example, a corona shielding system may include: an outer corona shield and an overhang corona shielding. The outer corona shielding and the overhang corona shielding may comprise a first corona shielding material having a nonlinear field strength-dependent electrical resistance.