Siemens Aktiengesellschaft

Daniel Verhoeven

Jürgen Hofmann

Siegfried Fichtner

Karl Müssig

The invention relates to an asynchronous motor comprising a stator or a cage rotor, said cage rotor comprising a shaft () and a laminated bundle () and rotor rods () are arranged within the laminated bundle, running through the openings () of each end plate () at both ends of the laminated bundle () and terminated with a short-circuit ring () which electrically connects the ends of the rotor rods () on one side of the cage rotor. Each end plate () comprises a circumferential projection which at least partly covers the short circuit ring () on the outside thereof with a positive fit and each end plate () contains a part of the rotor rod () and a part of the short circuit ring ().

Squirrel-cage rotor of an asynchronous machine

An electrical machine includes a housing and a shaft which is housed in the housing by means of a fixed bearing and a free bearing. The fixed bearing is formed by two grooved ball bearings which are respectively prestressed in opposite directions by springs. Thus, at least one of the two grooved ball bearings is always prestressed independently of the axial force exerted on the shaft, such that the required radial stiffness of the fixed bearing is guaranteed.

Electrical machine and its bearings

An electric machine includes a shaft and a rotor core mounted onto the shaft and formed of a plurality of stacked laminations. The rotor core has opposite end surfaces for attachment of a plate in such a manner as to allow an axial deflection of the laminations in the area of the plate.

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Nürnberg, Germany

Daniel Verhoeven