Siemens Aktiengesellschaft

Rolls-royce Deutschland Ltd & Co Kg

Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.

Osram Oled Gmbh

Siemens Energy Global Gmbh & Co. Kg

Peter Gröppel

Karsten Heuser

Tilman Schlenker

Jürgen Huber

Friedhelm Pohlmann

Steffen Lang

Markus Richter

Mario Brockschmidt

Claus Rohr

Roland Röding

Matthias Übler

Dieter Heinl

Florian Eder

Christian Schmid

Dirk Salz

Rolf Mülhaupt

Volker Muhrer

Walter Fischer

Christian Seidel

Alfred Baalmann

Michael Schreyer

Christian Meichsner

Mykhaylo Filipenko

Stefan Kempen

Igor Ritberg

Thomas Gleixner

Eberhard Ritzhaupt-Kleissl

Peter Donner

André Grübel

Matthias Böhm

Michael Nagel

Hans-Jürgen Maass

Volker Altstädt

Martin Johannes

Jörg Ihde

Pascal Heilmann

Peter Mürau

Julia Wirsing

Vicky Grübel

William Hunter

Regina Mühlberg

Joachim Hubmann

Manuel Weil

Marc Lessmann

Christian Müller-Elvers

Sabrina Buckl

Michael Schweizer

Michael Nedelcu

Andre Gruebel

Uwe Beier

Meik Wissert

Gerhard Piecha

Steffen Dr Lang

The coil winding has an electrical conductor for an electrical machine and includes at least two layers. The electrical conductor, following its longitudinal extension, runs inwardly wound in a first of the at least two layers, and then extends to a second of the at least two layers and runs outwardly wound in the second layer. The electrical machine includes at least one such coil winding. The hybrid electric aircraft is in particular an airplane and includes such an electrical machine and/or at least one such coil winding.

Coil, electric machine, and hybrid-electric aircraft

The electric machine comprises at least one winding () having at least one conductor () and electrical insulation for insulating one or more of the windings () and/or conductors (), wherein the insulation is formed by a metal oxide. The method for producing such an electric machine having at least one winding () having at least one conductor () comprises the steps of metallizing the at least one winding () and/or conductor () with metal and oxidizing the metal. The aircraft is in particular an electric or hybrid-electric aircraft and has such an electric machine ().

Electric machine, method for producing an electric machine, and hybrid-electric aircraft

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.

Material for insulation system, insulation system, external corona shield and an electric machine

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.

Storage-stable impregnating resins and electrical insulating tapes

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.

Two-layer high-voltage insulation system and electrical machine

An insulating system having improved partial discharge resistance includes an insulating tape around a conductor. The tape is a mica tape joined to a carrier. The tape is impregnated with a synthetic resin, and is interspersed with a nanoparticulate filler, present bimodally, in the form of two fractions of the filler differing in particle size and fraction size. An adhesion promoter may be in the resin.

Insulation systems with improved resistance to partial discharge, production method for this

A rotor end-bell () for an electric generator, the rotor end-bell () being made at least in part of fiber-reinforced plastic. A rotor () and an electric generator (T) have at least one such rotor end-bell (). The end-bell can be advantageously used in high-speed turbo generators.

Rotor end-bell for electric generators

An insulating material and its method of use of insulating material for rotating machines such as motors and generators. The insulating material includes a resin embedded with a filler that is not based only on a monomodal nanoparticle size particle distribution. Radiation erodes the material and is conductive to the formation of in situ protective layers on the body to be insulated.

Insulating material for rotating machines

To operate solar thermal technology economically, a cheap heat transfer fluid is used. To either completely spare or significantly reduce the energy-intensive auxiliary heating at night, a water tank is simply installed in the plant without a threat to the environment. With the water tank, the salt HTF is thinned by adding water when the solar heating is not in operation.

Solar thermal power plant and method for operating a solar thermal power plant

Fewer insulation layers can be used by virtue of using hydrophobic electrically conductive materials around a main insulation around a conductive bar. There are several more layers of conductive and/or non-conductive material.

Winding layers composed of different materials

Disclosed are insulating electric conductors against partial discharge and a method for producing an insulation system having improved partial discharge resistance and such an insulation system. There is an erosion-inhibiting effect of adhesion promoters, such as organic silicon compounds, added to resin when admixing nano particulate fillers. Good results may be attributable to a type of particle wetting of the nano particles as a result of particle wetting with organosilanes. The admixture of adhesion promoters with the resin before the addition of the nano particulate filler provides considerable advantages.

Insulation systems having improved partial discharge resistance, and method for producing same

A heat transfer medium is used in solar thermal power plants. The heat transfer medium can reversibly absorb and release water. The heat transfer medium releases water during heating and releases heat during re-absorption of the water.

Heat transfer medium, use thereof, and method for operating a solar thermal power plant

A varistor, or voltage-limiting composition has a polymer matrix and a particulate filler containing a partially conductive material applied to an electrically non-conductive carrier material. The carrier material has a lower density than the partially conductive material, so that the settling rate of the filler in the polymer matrix is reduced. The voltage-limiting composition can therefore also be used as a lacquer or for prepreg materials. A body which acts as a varistor may be produced using a composition of this kind by a method that includes annealing. The varistor may be used for surge arresters, in particular in medium-voltage systems, low-voltage systems, cable connections and cable fasteners.

Voltage-limiting composition

A method is provided for producing an electrical insulation paper having a particle composite. The method involves mixing a dispersion of particles in platelet form, a carrier fluid and a functionalizing agent which is distributed in the carrier fluid and has a proportion by mass in the dispersion corresponding to a predetermined mass ratio based on the proportion by mass of the particles. The dispersion is sedimented, such that the particles in platelet form are arranged in essentially plane-parallel layers in the sediment. The carrier fluid is removed from the sediment. Energy is introduced into the sediment to overcome the activation energy of that chemical reaction of the functionalizing agent with the particles which forms the particle composite from the sediment with coupling of the particles via the functionalizing agent. The mass ratio is predetermined such that the particle composite has a porous structure. The insulation paper is thereby produced.

Method for producing a porous particle composite for an electrical insulating paper

The invention relates to epoxy resins having an extremely low content of chlorine, particularly a low content of organically bound chlorine. The invention also relates to a production method during which total chlorine contents of less than 100 ppm in the epoxy resin are achieved by extracting solid epoxy resin particles, optionally after a prior comminution and/or reprecipitation. The use of these low-chlorine epoxy resins in the fields of electronics and/or electrical engineering considerably reduces the components' susceptibility to corrosion.

Low chlorine content epoxy resin

Growing community of inventors

Erlangen, Germany

Peter Gröppel