Siemens Aktiengesellschaft

Jörg Buschbeck

Rolf Vollmer

Gotthard Rieger

Carsten Schuh

Thomas Soller

Sybille Deim

Martin Scharrer

Various embodiments of the teachings herein include a magnetic sheet stack for an electric machine comprising: a plurality of magnetic sheets electrically insulated from one another by being spaced apart from one another predominantly with a non-vanishing clearance; a respective set of ceramic spacers distributed between each of the plurality of magnetic sheets from an adjacent sheet in the stack; and a respective gas layer filling a gap between a predominant part of a planar extent of each of the plurality of magnetic sheets allowing a cooling fluid to be circulated between the adjacent sheets.

Magnetic sheet stack, method for manufacturing a magnetic sheet stack and electric machine

In a method for producing a material sheet, in particular a metallic material sheet, a green body containing solid-state particles is sintered at a sintering temperature by heating the green body during sintering at least partly using microwave energy in accordance with a defined temperature profile having a heating phase and an essentially isothermal hold phase. A temperature of the green body is ascertained contactlessly with a sensor, and a supply of heat energy is controlled as a function of the temperature of the green body. During the heating phase an average microwave power is supplied and during the hold phase another average microwave power is supplied which is less than the one average microwave power.

Method for producing a material layer

Various embodiments include a method for producing an electrical steel sheet comprising the following steps: placing a green body comprising a first material on a substrate; structuring a surface of the green body; and thermally treating the green body.

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Nuremberg, Germany

Jörg Buschbeck