Siemens Aktiengesellschaft

Karl Senninger

Oliver Memminger

Norbert Schönbauer

Gunther Elender

The rotor of an electrical motor should be designed simply and able to be efficiently cooled. To this end, the invention relates to an electrical motor having a rotor that has at least one radial cooling slot () and axially running cooling channels. The first cooling channels () run having their central axis at a different radial height opposite the axis of the rotor () than the second cooling channels (). A spacer () is arranged in the at least one radial cooling slot () by means of which a first cooling stream () can be conducted from one of the first cooling channels () into one of the second cooling channels (). A second partial package (T) in the flow direction can also be supplied with cool air in this way if it flows through the first partial package (T) in a cool region, such as near the shaft.

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Egglham, Germany

Karl Senninger