Patent ID: 8878403
Filing Date: 2014-11-04
Classification: F28D,F28F,H02K

Abstract:
1. An air-cooled motor-generator comprising: a rotor with a rotor shaft arranged rotatably about a machine axis and including a rotor winding arranged on the rotor shaft; a stator having a stator laminate stack and a stator winding arranged in the stator laminate stack, the stator concentrically surrounding the rotor winding; a closed cooling circuit configured and arranged for operation with cooling air, such that cooling air in said cooling circuit flows through the rotor winding and the stator winding radially from the inside outwards; coolers arranged outside the stator configured and arranged to cool the cooling air and feed back cooled cooling air to the rotor; and adjustable throttle devices configured and arranged to adjust a volume flow of the cooling air in the cooling circuit at the coolers, wherein the throttle devices comprise a plurality of throttle elements arranged distributed in a plane perpendicular to the direction of flow of cooling air through the devices, with each of the throttle elements comprising a through-opening and a throttle valve which can pivot about an axis of rotation, the throttle valve being arranged as a flap valve.