Siemens Aktiengesellschaft

Patryk Piotrowski

Konrad Brandl

Maximilian Pfaller

André Trepper

Siegfried Fichtner

Vladimir Danov

Bernd Gromoll

Jürgen Hofmann

Christian Deeg

Andreas Schröter

Klaus Dennerlein

Martin Scharrer

A cage rotor for an electric machine, has a laminated rotor core having a groove, a rotor end ring that is cast on to one axial end of the laminated core and has a first material and a bar situated in the groove and supported by a deformable bearing having a bearing device. A laminated rotor core for a cage rotor includes a groove and a bearing device, an electric machine with a cage rotor, a method for producing a laminated rotor core by producing a bearing device on the laminated rotor core, and a method for producing a cage rotor by supporting a bar in a groove by a deformable bearing having a bearing device.

Cage rotor comprising a deformable bearing

A cage rotor for an electrical machine includes a rotor laminated core having a groove, and a short-circuiting ring having a first material and cast onto an axial end of the rotor laminated core. Arranged in the groove is a bar which has a bar end. The bar end penetrates into the first material of the short-circuiting ring and has a plurality of notches to provide the bar end with a greater flexibility.

Cage rotor and bar comprising a notch

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

Growing community of inventors

Nürnberg, Germany

Patryk Piotrowski