Siemens Aktiengesellschaft

Jürgen Draber

Friedrich Schöberl

Oliver Memminger

Arno Klein-Hitpass

Ralf Martin Dinter

Jan-Dirk Reimers

Norbert Schönbauer

Axel Möhle

Roland Zeichfüssl

Daniel Friedl

Anatoli Vogel

Alfons Böing

Frank Kretschmann

Johann Stegner

Robert Danner

Arne Grüning

Roland Zeichfüßl

A drive system having an integrated transmission and motor/generator unit for a wind turbine includes a transmission output shaft designed as a hollow shaft, which receives a sun shaft of an output-side planetary gear stage and is connected thereto. The transmission output shaft comprises a transmission-side end section of an insert shaft which is concentrically arranged within a rotor hollow shaft. The transmission output shaft additionally has a bearing for receiving radial and axial forces. The motor/generator unit has two dedicated bearings. One bearing thereof is a transmission-side bearing. In addition, a rear-side generator bearing is provided.

Drive system for a wind turbine

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

Growing community of inventors

Passau, Germany

Jürgen Draber