Alstom Technology Limited

Abb Research Ltd.

General Electric Technology Gmbh

Alstom Renewable Technologies

Asea Brown Boveri Ag

Asea Brown Boveri Inc.

Alstom

Thomas Baumann

Massimiliano Vezzoli

Johann Christoph Nienburg

Dieter Stoll

Thomas Hillmer

J&ouml;rg Oesterheld

Reinhard Fried

Joerg Oesterheld

Rico Gasparini

Reinhard Joho

Albrecht Bock

Jorg Oesterheld

Thomas Widmer

Jörg Sopka

Jörg Oesterheld

Alexander Stankowski

Roland Schuler

Willi Paul

Johann Haldemann

Piero-Daniele Grasso

Hossein Safari Zadeh

Thomas Klamt

Jakob Rhyner

Peter Klee

Hans-Christoph Nienburg

Sven Olliges

Clemens Dransfeld

Alexander Rene Anderton

Konstantinos Ballos

J&ouml;rg Sopka

Mostafa Sadeghi

Peter Unternahrer

Stephan Mueller

Paul Howard

Iwona Szkoda-Giannaki

Mauro Melas

Alexander Anderton

A method and a turbine part having a coating with a matrix layer that includes a high temperature resistant hydrophobic polysiloxane filler, wherein the coating has superior mechanical strength and temperature resistance.

Coatings for turbine parts

The present disclosure relates to an insulation material for a conductor bar of an electric machine. An object of the invention is to provide for an alternative insulation material in the field of electric machines. The object is solved by an insulation material for a conductor bar for an electric machine comprising glass-ceramic flakes made from a heat treated silica glass precursor in the shape of flakes. Further disclosed are a corresponding method and the use of glass-ceramic flakes as an insulation material for a conductor bar of an electric machine.

Insulation material and a method to produce

An arrangement includes conducting bar ends connected together and a cap) covering them filled with a putty. The cap is made of a resin containing a high thermal conductivity filler. The putty is a silicone elastomer containing a high thermal conductivity filler.

Arrangement of conducting bar ends

A method is for impregnating a high voltage insulation of a winding bar (), the winding bar () having a conductive bar () around which layers of insulating mica tape defining said high voltage insulation are wrapped. The method includes enclosing the winding bar () in a flexible sleeve (), applying a vacuum in the flexible sleeve () to extract the gases contained in the insulating mica tape, supplying an impregnating resin into the flexible sleeve () to impregnate the mica tape (), and curing the resin. The impregnating resin is supplied into the flexible sleeve () at a pressure less than 1.5 bar.

Method for impregnating a high voltage insulation of a winding bar

A method for insulating () a conductive bar () includes wrapping an insulating tape () around the conductive bar (), enclosing it in a flexible container (), applying a vacuum, impregnating the insulating tape () with an impregnating resin, curing the impregnating resin, and removing the conductive bar () with the insulation () around it from the flexible container (). In addition, together with the insulating tape (), an impregnating tape () made of the impregnating resin is wrapped around the conductive bar (). In order to impregnate, the impregnating tape () is melted.

Method for insulating a conductive bar

A high voltage stator bar includes a substantially quadrangular conductive element made of a plurality of interwoven strands, and an electric insulation applied around the conductive element. The permittivity at the corners of the electric insulation decreases by less than 60% from an inner insulation zone facing the conductive element towards an outer insulation zone.

Stator bar

A Roebel bar for a rotating electrical machine includes a straight slot part disposed in a slot in an iron sheet of a stator of the rotating electrical machine and a bent yoke part adjacent to the straight slot part and protruding from the stator, wherein the bent yoke part is configured to connect the Roebel bar to at least one more Roebel bar so as to form a winding. A copper conductor disposed in the straight slot part and the bent yoke part is surrounded by an insulation having an outer surface. A slot corona shielding includes an electrically conductive layer disposed on the outer surface of the insulation in an area of the straight slot part. A yoke corona shielding includes a semiconducting layer disposed on the outer surface of the insulation in an area of the bent yoke part.

Roebel bar for rotating electrical machines

A conductor bar for a stator of a generator includes a plurality of internal conductor elements; an insulation wound around the plurality of internal conductor elements so as to externally enclose the plurality of internal conductor elements, the insulation including impregnated glass/mica bands; and at least one interlayer disposed between the insulation and the plurality of internal conductor elements so as to improve a mechanical connection between the plurality of internal conductor elements and the insulation.

Conductor bar for the stator of a generator, and method for its production

A method for manufacturing a conductor bar of a rotating electrical machine includes providing a conductor defining a longitudinal direction and having a rectangular cross section, and building up an insulation to a thickness d around the conductor by progressively winding an insulating tape around the conductor a plurality of times in the form of a spiral in the longitudinal direction. The building up of the insulation includes winding the insulation tape around the conductor using parallel winding up to a first partial thickness, and winding the insulating tape around the conductor using non-parallel winding from the first partial thickness.

Method for manufacturing a conductor bar of a rotating electrical machine and a conductor bar manufactured according to this method

A device for improving the protection of a component against surface discharges includes a non-woven substrate made of fibers and configured to be electrically insulating and a coating containing silicon carbide (SiC) disposed on the substrate.

Device for improving the protection of a construction unit against electrical corona discharges

The present invention discloses a process for producing a high-quality insulation for conductors or conductor bundles of electrical machines by means of spray-sintering. Unlike in the prior art, it is possible to apply internal corona-discharge protection, insulation and external corona-discharge protection to conductors or conductor bundles in which, on account of a very low level of defects in the insulation and its inherent resistance to partial discharges, it is possible to dispense with the use of winding processes using glass/mica tapes. This eliminates the need to use complex special equipment and allows the throughput times to be shortened considerably.

Method for producing a high-quality insulation of electric conductors or conductor bundles of rotating electrical machines by means of spray sintering

The invention relates to a process for manufacturing a conductor bar comprising a number of partial conductors, with the following steps:

Method for producing a bar-type conductor

A Roebel bar () for an electrical machine comprises a plurality of essentially parallel, transposed conductor elements (), which, lying over and/or next to one another, form a bar with an essentially rectangular cross section, which is surrounded on the outside by an insulation () and has between the insulation () and the conductor elements () means () for forming an inner corona protection (ICP). In the case of such a Roebel bar, particularly effective inner corona protection is achieved by the fact that the means for inner corona protection comprise preformed, angled profiles () of an electrically conducting material, which, running in the longitudinal direction of the Roebel bar (), enclose the edges of the bar formed by the conductor elements (), and to which the insulation () is applied.

Roebel bar for an electrical machine and method for producing such a roebel bar

A process for producing insulations for electrical conductors by powder coating, which results in aging which is improved compared to glass-mica or casting-resin insulation, and a powder which is suitable for such a process. The powder is applied a number of times in succession, in the form of individual layers which follow one another, until a layer thickness of &#x2266;10 mm is reached, and each of the individual layers undergoes intermediate heat curing before the next individual layer is applied. The intermediate curing of each individual layer uses a curing time which corresponds to 2-10 times the gel time of the powder used. Finally, the entire insulation undergoes final curing. The result of an electrical life test carried out on various specimens insulated with epoxy-resin powder which contains fine filler.

Process for producing insulations for electrical conductors by means of powder coating

The present invention relates to a reinforced, pressure-resistant flexible tube for mechanical end-winding support for rotating electrical machines. The flexible tube according to the invention in this case comprises a glass fiber bundle which is encased by an inner glass cloth flexible tube. This glass cloth flexible tube is in turn externally coated with a polymer layer and is for its part surrounded by an outer glass cloth flexible tube. A matrix polymer is introduced into the inner glass cloth flexible tube and, after it has cured, the reinforced, pressure-resistant flexible tube can carry out its supporting and spacing function fully.

Growing community of inventors

Wettingen, Switzerland

Thomas Baumann