Patent ID: 8283817
Filing Date: 2012-10-09
Classification: H02K

Abstract:
1. An electric machine comprising a stator, a rotor operating as a rotor fan and comprising a shaft defining an axial direction and having radial and axial cooling channels, and an axial fan configured as a twin axial fan and arranged coaxially with the shaft and supplying a coolant to the axial cooling channels, wherein the axial fan comprises a first blade ring and a second blade ring and a funnel-shaped tube having a smaller opening, which is directly connected to the axial cooling channels of the rotor to deliver coolant to the axial cooling channels of the rotor, and a larger opening, which is non-rotatably connected to and encloses the first blade ring, and wherein the second blade ring is firmly attached at an outer circumference of the funnel-shaped tube to deliver the coolant to the stator.