Abstract: An electric machine has a housing, a rotor shaft mounted in the housing, a rotor laminate stack arranged on the rotor shaft and having axial cooling channels and radial cooling channels, and a stator laminate stack having radial cooling channels which are open radially inwards and radially outwards and interact with the radial cooling channels of the rotor laminate stack. The housing has a lateral surface to delimit the housing interior in a radial direction and radial dividers arranged between end windings of the stator winding and the axial ribs, when viewed in the radial direction, and are spaced in the radial direction from the lateral surface delimiting the housing interior and forming tangential cooling air channels for the cooling air.

Abstract: A rotor shaft (2) is mounted in the housing (1) of an electric machine so as to be rotatable about a shaft axis (3). The housing (1) has two front faces (4) which axially delimit a housing interior (6). The housing has a peripheral surface (5) which radially delimits the housing interior (6). A rotor lamination stack (7) is arranged on the rotor shaft (2), said stack having axially extending cooling channels (8) and radially extending cooling channels (9). The radially extending cooling channels (9) of the rotor lamination stack (7) are radially open to the outside and extend radially inwards to at least the axially extending cooling channels (8). The housing (1) has two axial dividers (10) which extend radially inwards starting from the peripheral surface (5) but end in front of the rotor shaft (2).; The axial dividers (10) are arranged between the rotor lamination stack (7) and the front faces (4) when seen in the axial direction.