Abstract: A method for the non-destructive detecting of ageing symptoms of a component having regularly recurring structures, includes the following steps: a) scanning the component in the region of the recurring structures in a plurality of scanning planes which extend parallel to one another to create at least one scanning image set having a plurality of two-dimensional scanning images, wherein the scanning images show a plurality of inhomogeneities; b) automatically identifying those inhomogeneities that form recurring patterns, and those inhomogeneities that do not follow a recurring pattern, using a suitable algorithm; and c) detecting ageing symptoms exclusively on the basis of those inhomogeneities which are identified in step b) and do not follow a recurring pattern.

Abstract: A method and testing device for the non-destructive testing of at least partial regions of an insulation of a stator winding of an electric machine, in particular a generator of a high-voltage motor, wherein the non-destructive testing is carried out in situ at the installation site of the electric machine using terahertz measurement technology.

Abstract: A method for the non-destructive detecting of ageing symptoms of a component having regularly recurring structures, includes the following steps: a) scanning the component in the region of the recurring structures in a plurality of scanning planes which extend parallel to one another to create at least one scanning image set having a plurality of two-dimensional scanning images, wherein the scanning images show a plurality of inhomogeneities; b) automatically identifying those inhomogeneities that form recurring patterns, and those inhomogeneities that do not follow a recurring pattern, using a suitable algorithm; and c) detecting ageing symptoms exclusively on the basis of those inhomogeneities which are identified in step b) and do not follow a recurring pattern.

Abstract: A water chamber cover for connecting a water hose to a water chamber bottom plate of a directly water-cooled stator bar, having a peripheral groove, which is open on a side facing away from the water chamber and which is designed to hold the water hose. A method is for assembling a cooling water circuit for a directly water-cooled stator bar.

Abstract: A water-cooled generator strip having at least two conductor stacks which are arranged parallel and in each case have a plurality of conductors arranged one above the other and electrically insulated from one another by a conductor insulation, wherein the conductors are secured geometrically relative to one another by a cured resin, and wherein between the conductor stacks a gap space is provided, in which at least one cooling channel is arranged for conveying cooling water.

Abstract: High-voltage insulation systems are simplified and can have a thinner design by the use of an external corona shielding system that may include an electrically conductive PTFE fabric. Thermal conductivity may also be improved.

Abstract: A corona shield for an electric machine, has a varnish that contains a first polymer resin, first electrically conductive particles that are dispersed in the first polymer resin, and microcapsules which are dispersed in the first polymer resin and include a second polymer resin in their interior.

Abstract: An electrical insulation tape for a high-voltage electrical machine, having a particle composite that can be impregnated, which has a plurality of platelet-shaped electrical insulation particles, and having first spacing particles, which are applied to the surface of the electrical insulation tape such that the porosity of the electrical insulation tape is higher in the region of the first spacing particles than in the region of the particle composite that can be impregnated.

Abstract: A corona shielding system for a high voltage machine including a sleeve for a live conductor of the high voltage machine, wherein the sleeve has an electrically conductive lacquer, wherein a filler is added to the conductive lacquer, the filler at least partially including a thermoexpanding filler, is provided. A repair lacquer and a method for production is further provided.

Abstract: An anhydride-free impregnating resin for an electrical insulation body, the impregnating resin has an epoxy resin, a curing agent and nanoscale and/or microscale inorganic particles. An impregnable electrical insulating tape for an electrical insulation body has a curing agent applied to the electrical insulating tape. A method includes producing an electrical insulation body An electrical insulation body includes an anhydride-free impregnating resin, where the impregnating resin has an epoxy resin, a curing agent and nanoscale and/or microscale inorganic particles.

Abstract: A water-cooled generator strip having at least two conductor stacks which are arranged parallel and in each case have a plurality of conductors arranged one above the other and electrically insulated from one another by a conductor insulation, wherein the conductors are secured geometrically relative to one another by a cured resin, and wherein between the conductor stacks a gap space is provided, in which at least one cooling channel is arranged for conveying cooling water.

Abstract: By using an electrically conductive PTFE fabric, high-voltage insulation systems are simplified and can be made thinner, also improving the thermal conductivity. The insulation material is in two layers, each with a hydrophobic and a hydrophobic region, and the hydrophobic regions of the layers are opposed.

Abstract: An electric machine having an electrical conductor, a main insulation surrounding the conductor, an outer corona shield surrounding the main insulation, a laminated core having grooves, into which grooves the conductor is inserted, and an electrically conductive layer, which is arranged radially outside of the outer corona shield and is designed to connect the outer corona shield to the laminated core in an electrically conductive manner. The adhesions of the main insulation, the outer corona shield, the electrically conductive layer, and the laminated core are coordinated with each other in such a way that the lowest adhesion is present at a surface of the electrically conductive layer.

Abstract: The corona shield can be applied in electric machines in a faster manner by using radiation-cured materials.

Abstract: An impregnable electrical insulating paper for an electrical insulating body having first platelet-shaped particles which have layer silicates, and second platelet-shaped particles which have a heat conductivity at 20° C. of at least 1 W/mK. A method for producing an impregnable electrical insulating paper, an electrical insulating tape, an electrical insulating body, and the use of the electrical insulating body having first platelet-shaped particles which have layer silicates, and second platelet-shaped particles.

Abstract: The corona shield can be applied in electric machines in a faster manner by using radiation-cured materials.

Abstract: A compound having the structural formula R1CO2? R2CO2? Zn2+ used as a reaction accelerator for the copolymerization of a mixture of a carboxylic acid anhydride and an oxirane, wherein R1 and R2 are a straight-chained or branched alkyl group independently of each other.

Abstract: An anhydride-free impregnating resin for an electrical insulation body, the impregnating resin has an epoxy resin, a curing agent and nanoscale and/or microscale inorganic particles. An impregnable electrical insulating tape for an electrical insulation body has a curing agent applied to the electrical insulating tape. A method includes producing an electrical insulation body An electrical insulation body includes an anhydride-free impregnating resin, where the impregnating resin has an epoxy resin, a curing agent and nanoscale and/or microscale inorganic particles.

Abstract: High-voltage insulation systems are simplified and can have a thinner design by the use of an external corona shielding system that may include an electrically conductive PTFE fabric. Thermal conductivity may also be improved.

Abstract: An impregnating resin for an electrical insulation body includes a base resin, a filler having nanoscale particles, and a radically polymerizing reactive diluent. The impregnating resin includes a crosslinker for crosslinking the base resin and the reactive diluents. The base resin is an epoxy resin. An electrical insulation body includes the impregnating resin and a method produces the electrical insulation body by production of an impregnating resin having a base resin, a filler having nanosize particles and a free-radically polymerizing reactive diluent.