An electric machine (1) comprises; a casing; a stator (3) fixed to the casing and including at least one electrical winding (5); a rotor (4) housed in the casing and rotatably connected to the latter; an electronic circuit (8) for powering the winding (5) at least partly housed in the casing; a cover (2a) for closing the casing to form with the latter a sealed enclosure; a terminal strip (9), accessible from outside the sealed enclosure, for controlling and powering the electronic circuit (8); a heat sink, embodied by the cover (2a), for absorbing the heat produced, in particular, by the electronic circuit (8). The machine (1) also comprises elastic elements (12) operating between the stator (3) and the electronic circuit (8) in such a way as to press the electronic circuit (8) against the heat sink.