Siemens Aktiengesellschaft

Klaus Happel

Bruno Heim

Klaus Greubel

Felix Ludwig

Erhard Derleth

Jochen Pecher

Thomas Niklaus

An electric machine includes an external rotor rotatable about a rotation axis, and a stator arranged in coaxial relationship to the rotation axis in the external rotor. The stator is comprised of a first stator portion to define a core element, and a second stator portion arranged in the form of a ring in surrounding relationship to the core element and including radially inwardly directed teeth to define a comb-shaped configuration with slots which taper towards the rotation axis for receiving a stator winding. The comb teeth have free ends which are supported on the core element.

Electric machine and method of making an electric machine

An electric machine, includes a stator with a laminated stator body having winding end portions potted in a cast, and a rotor for interaction with the stator. In order to cope with the increased heat development in the zone of the winding end portions compared to the zone of the stator body, the cast of the winding end portions is formed with surface-enlarging structures in heat-conducting contact with a cooling jacket or with a cooling medium, and/or the cast is provided at least partially with a heat-conducting envelope which carries off heat.

Electric machine with improved cooling feature

Growing community of inventors

Wollbach, Germany

Klaus Happel