Electrical machine having an internally cooled rotor

摘要

The invention relates to an electrical machine having an internally cooled rotor which has a centre opening (7) which passes through it axially and to which a cooling medium is applied. The cooling of the rotor is improved, and the degree of protection of the machine is increased in that the cooling medium is fed to the centre opening (7) from outside the machine housing, and flows through said centre opening (7) entirely in the axial direction, the cooling medium which flows through the rotor (1) being completely bounded with respect to the interior (which contains the stator) of the machine housing. <IMAGE>