A wound rotor for an electric motor comprising: - a rotor shaft rotatably 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, - stack of laminations insulators arranged so as to at least partially cover external surfaces of the stack of laminations defining the interpolar spaces, said stack of laminations insulators and said external surfaces being configured to form, therebetween, longitudinal fluid circulation channels, said longitudinal fluid circulation channels extending axially along the stack of laminations such that they open, at one of their ends, at the level of the front lateral face of said stack of laminations and, at another of their ends, at the level of the rear lateral face of said stack of laminations, said longitudinal fluid circulation channels being configured to allow the circulation of a cooling fluid; - 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 (143, 144) of the stack of laminations, said front and rear winding flanges (15, 15') each having a series of T-shaped radial branches, each of said radial branches being axially aligned with one of the poles of the stack of laminations and preferably 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 stack of laminations insulators and the radial branches of the front and rear winding flanges (15, 15'); in which the shaft is provided with at least one first internal channel for circulating a cooling fluid, called the fluid inlet channel, and at least one second internal channel for circulating a cooling fluid, called the fluid outlet channel, and in that the front winding flange, respectively the rear winding flange, is crossed by at least one front, respectively rear, connecting channel, inside which a cooling fluid can circulate, said at least one front, respectively rear connecting channel being in fluid communication with one of said fluid inlet and fluid outlet channels and with at least one of said longitudinal fluid circulation channels. - a rotor shaft rotatably 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, - stack of laminations insulators arranged so as to at least partially cover external surfaces of the stack of laminations defining the interpolar spaces, said stack of laminations insulators and said external surfaces being configured to form, therebetween, longitudinal fluid circulation channels, said longitudinal fluid circulation channels extending axially along the stack of laminations such that they open, at one of their ends, at the level of the front lateral face of said stack of laminations and, at another of their ends, at the level of the rear lateral face of said stack of laminations, said longitudinal fluid circulation channels being configured to allow the circulation of a cooling fluid; - 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 (143, 144) of the stack of laminations, said front and rear winding flanges (15, 15') each having a series of T-shaped radial branches, each of said radial branches being axially aligned with one of the poles of the stack of laminations and preferably 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 stack of laminations insulators and the radial branches of the front and rear winding flanges (15, 15');