Patent ID: 6211586
Filing Date: 2001-04-03
Classification: H02K

Abstract:
A gas-cooled electrical machine comprising:a laminated stator core having slots;a stator winding arranged in the stator core slots;two stator winding bars located one above the other in a slot, constructed from mutually insulated conductor elements, and electrically connected to one another outside the laminated stator core in the winding overhang by eyes and round connections to form a winding, the eyes comprising normal eyes and discharge eyes, and having a fan for producing a cooling gas flow through the machine, a flow element of the cooling gas flow being passed through first cooling channels located within the eyes;wherein the stator winding bars in the winding overhang are provided with first cooling channels only in the region of the eyes the first cooling channels;wherein the discharge eyes have pipe connections on the outlet side of the first cooling channels between themselves and the round connections which are hollow conductors, the round connections being hollow conductors with second cooling channels which are freely connected to the first cooling channels of the discharge eyes;wherein the second cooling channels in the round connections are connected by insulating tubes to an area which is separated from the winding overhang area by a bulkhead wall; anda casing between the bulkhead wall and the ends of the eyes to force the flow in the first cooling channels through the normal eyes.