Siemens Aktiengesellschaft

Voit Patent Gmbh

Voith Patent Gmbh

Klaus Dennerlein

Michael Frank

Peter Van Hasselt

Thomas Hammer

Vladimir Danov

Norbert Huber

Peter Kummeth

Bernd Gromoll

Alexander Hahn

Armin Datz

Jörn Grundmann

Jürgen Hofmann

Konrad Brandl

Andreas Schröter

Jochen Straub

Anne Bauer

Patryk Piotrowski

Ralf Cordes

Andreas Reiner

Hagen Hertsch

Anne Kuhnert

Dieter Most

Carola Kuehn

Werner Straub

Joern Grundmann

Jochen SCHÄFER

Carola KÜHN

Martin Tackenberg

Carola Kuhn

Jorn Grundmann

The present disclosure relates to cooling devices. The teachings thereof may be embodied in devices for cooling a rotor, which rotates about an axis, wherein the rotor is supported by a central rotor shaft. For example, in a cooling device, the rotor may be supported by a central rotor shaft and comprise a hollow space in the interior of the rotor shaft for accommodating coolant. It may include a first coolant line extending radially outwardly from the hollow space and an annular first distribution line fluidically connected to the hollow space via the first coolant line.

Cooling device for a high pole-count rotor

An electric machine has a base body with a stator, a rotor shaft mounted in the base body, and a heat exchanger. Cooling ducts for a liquid cooling medium are arranged in the base body. The rotor shaft is embodied as a hollow shaft through which the liquid cooling medium can flow. The heat exchanger dissipates heat contained in the liquid cooling medium to the surroundings of the electric machine. The heat exchanger, the rotor shaft and the cooling ducts are fluidically connected in series, producing a closed circuit for the liquid medium. A feed element is arranged to co-rotate with the rotor shaft. The feed element is inserted in the closed circuit for the liquid cooling medium to forcibly circulate the liquid cooling medium in the closed circuit as the rotor shaft for the liquid cooling medium rotates.

Electric machine with enclosed, autonomous cooling medium circuit

A method for the dry production of a membrane-electrode unit includes assembling a layered configuration including a centrally positioned membrane produced by extrusion and pre-dried at a temperature between 80&#xb0; C. and 100&#xb0; C. for 15 min to 30 min, a substrate-electrode unit on each side of the membrane having an electrode layer applied to a substrate, an optional frame around each substrate-electrode unit for fixing the substrate-electrode unit, and two separating films on outer sides. The configuration is pressed together between two laminating rollers so that a pressure connection is produced at least between the membrane and the electrode layers. A short production time is achieved because it is not necessary to keep the membrane moist at high temperatures under pressure. A membrane electrode unit and a roller configuration are also provided.

Method for the dry production of a membrane electrode unit, membrane electrode unit, and roller arrangement

An electrolytic cell, a method for manufacturing the cell, and a method of operating same. The electrolytic cell has at least two bipolar plates, at least one fluid inflow and outflow, as well as at least one laminated core arranged between the at least two bipolar plates. The laminated core is constructed from laminations which are stacked one on top of the other. At least two laminations have recesses which are designed to extend through the entire thickness of the respective lamination. The at least two laminations are arranged one on top of the other in such a way that recesses in adjacent laminations overlap partially, but not completely, as a result of which ducts, which are continuous in the direction of the plane of the lamination, are formed.

Electrolytic cell having a laminated core of laminations which are stacked one on top of the other with recesses, and method for manufacturing and operating same

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Erlangen, Germany

Klaus Dennerlein