A wind turbine for generating electric energy, having: a nacelle (3),- a blade assembly (5) rotatable with respect to the nacelle (3); a first and second electric machine (9, 13; 13, 9) having, respectively, a first and second stator (10, 14; 14, 10) substantially coaxial with each other, and a first and second rotor (11, 15; 15, 11) coupled respectively in rotary manner to the first and second stator (10, 14; 14, 10); a transmission assembly (17) connecting the first rotor (11; 15) to the second rotor (15; 11); and a control device (8) for controlling the wind turbine (1) and reducing oscillation on the transmission assembly (17).