Electric machine with indirectly-cooled stator winding

Abstract

Abstract 1. Electric machine having a casing, a stator, with indirectly cooled stator winding conductors (12) arranged in stator slots, and a rotor (10), in which arrangement the laminated stator core is built up of individual part-stacks of laminations (3) which are spaced apart by spacing ribs (15), and the intermediate spaces between two successive part-stacks of laminations form radially extending cooling slots (8, 11), the space between the laminated stator core back and the casing jacket (1) is subdivided into individual cooling gas chambers (6, 7, 14) through which, seen from both ends of the machine, cooling gas can be alternately radially supplied through first cooling slots (8) to the rotor (10) and both the gas coming from the first cooling slots and the gas heated in the rotor can be conducted away from the rotor (10) by means of second cooling slots (11), characterized in that the second cooling slots (11) are severally partitioned off with respect to the stator winding conductors (12), that additional cooling ducts (13), extending in the axial direction, are provided in the area of the second cooling slots (11) which are open towards the side face of the stator winding conductors (12) and are formed by openings in the side walls of the stator winding slots and by the partioning-off and which cooling ducts (13) are connected to one of the first cooling slots (8a) on the inlet side and to at least one of the second cooling slots (11') on the outlet side.

Inventors

• 👤 Reinhard Joho
• 👤 Klaus Weigelt

Bibliographic Details