Wound rotor with winding flanges and shaft with radial and axial fluid channels

A wound rotor for electric motor comprising:

• a rotor shaft rotary mounted about an axis;
• a stack of laminations mounted coaxially on the rotor shaft, said stack of laminations extending between a front lateral face and a rear lateral face and having an alternation of poles and interpolar spaces;
• a front winding flange and a rear winding flange mounted coaxially on the rotor shaft and arranged axially on either side of the stack of laminations so as to be contiguous respectively to the front and rear lateral faces of the stack of laminations, said front and rear winding flanges each having a series of radial branches in the shape of a T, each of said radial branches being aligned axially with one of the poles of the stack of laminations and having a profile similar or identical to that of said pole in a plane perpendicular to the axis of the shaft;
• windings partially surrounding the poles of the stack of laminations and the radial branches of the front and rear winding flanges;
• wherein the shaft is provided with at least one internal channel for circulating a cooling fluid, called a fluid inlet channel, and in that the front winding flange and/or the rear winding flange is crossed by several radial fluid outlet channels oriented radially relative to the axis of the shaft and inside which can circulate a cooling fluid, each of said radial fluid outlet channels being in fluid communication with said fluid inlet channel and opening at a radial fluid outlet opening located at the external periphery of said front winding flange and/or said rear winding flange, and
• wherein the front, respectively rear winding flange, is also crossed by a plurality of intermediate channels, each of said intermediate channels being orthogonally oriented to one of the radial fluid outlet channels and opening, at a first end, into said radial fluid outlet channel and, at a second end, into an axial fluid outlet channel opening at the level of an axial fluid outlet opening located on an external lateral face of said front, respectively rear winding flange.