A STATOR FOR AN ELECTRICAL MACHINE OF A WORKING MACHINE

摘要

A stator (100) for an outer rotor electrical machine comprises stator windings (103) and a core structure (101) comprising ferromagnetic material. The core structure comprises a yoke (102) and stator teeth connected to the yoke. The stator comprises a cooling element (104) located in a cavity constituted by the yoke and being in a heat conductive relation with the yoke. A surface of the cooling element has a mechanical contact with a surface of the cavity so as to provide the heat conductive relation. The mutually contacting surfaces of the cooling element and the cavity are conical so as to facilitate arranging the mechanical contact between the yoke and the cooling element. The conical shapes of the surfaces make it possible to maintain the heat conductive relation with the aid of tensioning devices, e.g. screws and/or springs, for generating axial force pressing the cooling element axially against the yoke.