Flender Gmbh

Siemens Aktiengesellschaft

Daniel Friedl

Oliver Memminger

Klaus Schifferer

Robert Gruber

Herbert Binder

Anatoli Vogel

Norbert Schönbauer

Friedrich Schöberl

Jürgen Draber

Andrej Raskopf

Nicole Devingtel

Johann Stegner

Lorenz Hraska

Laslo Toldi

Georg Brunner

Robert Danner

Markus Sentef

Matthias Reisinger

Günther Ortmeier

Thomas Garhammer

Mesaros Akos Keceli

A dynamoelectric machine includes a shaft, a rotor arranged fixedly on the shaft for conjoint rotation, and a slip ring system enabling a rotor winding system to be contacted electrically and including a slip ring body having slip rings arranged spaced-apart axially behind one another and assigned to an electrical phase. The slip ring body is connected fixedly to the shaft for conjoint rotation and has between an inner side thereof and the shaft a section which forms an axially open cavity on both skies. In a region of the slip ring system, the shaft is hollow with a hollow shaft portion assigned to the slip ring system for routing feed lines to the rotor winding system. Recesses are provided on the cavity axially on an inside and axially on an outside for introducing a cooling medium flow axially into the cavity and discharge thereof into an outlet region.

Dynamoelectric machine having cooling of the slip ring system

An electric machine includes a hollow-cylindrical stator and at least two receiving elements, each receiving element at least partially enclosing the stator in a circumferential direction along an inner coverage length and conjointly connected to the stator in the circumferential direction along an inner fastening length. A stator housing is conjointly connected to the receiving elements in the circumferential direction along the outer fastening length. The inner fastening length extends at most along 120° in the circumferential direction, and the outer fastening length extends at most along 200° in the circumferential direction.

Electric machine and wind turbine

A slip ring system of an electrically excited dynamoelectric machine can be designed to be closed or open and includes a carrier segment configured to include a brush holder which includes a brush pocket for receiving a brush. The brush holder includes means for cooling the brush in the brush holder and/or for cooling the brush holder and has a surface-enlarging structure so as to enable a cooling air flow to be guided within the slip ring system and thereby cool the brush holder and/or brush pocket.

Slip ring system with improved cooling

An electrical machine with a stator has a winding support, which has at least one radial cooling slot, and a rotor, which likewise has at least one radial cooling slot. The winding support of the stator has on its outer shell a number of axially running cooling ribs, along which an axially running first cooling flow can be directed. Furthermore, the rotor has axially running first cooling ducts, which open out into its at least one radial cooling slot, so that a second cooling flow can be directed in the axial direction along the axial cooling ribs of the stator through the axial first cooling ducts of the rotor, the at least one radial cooling slot of the rotor, the air gap between the rotor and the stator and the at least one radial cooling slot. In this way, the stator can be cooled by two different cooling flows.

Electrical machine with multiple cooling flows and cooling method

A bearing change in an electrical motor and in particular a generator having permanent magnetic excitation should be able to be carried out safely. To this end, the invention relates to an electrical motor having a shaft () on which a rotor is mounted and a bearing unit () by means of which the shaft () is rotatably mounted. In addition, the electrical motor has a rotor support shield () to which the bearing unit () is fastened. Furthermore, the rotor support shield () is sized so as to be capable of supporting the shaft () when the bearing unit () is removed and seals a grease chamber () of the bearing unit () opposite the shaft (). With the rotor support shield, a permanent magnet-equipped rotor can in particular be prevented from coming into contact with the stator when the bearing is removed.

Electrical motor having rotor support shield

Growing community of inventors

Fürstenzell, Germany

Daniel Friedl