Direct-drive wind turbine

A direct drive wind turbine comprising a tower with a nacelle at an upper end of the tower, a stationary frame attached to the nacelle and a hub with blades, concentric with the frame, rotative rotating about an axis of rotation in regards the frame, the axis of rotation defining an axial direction, the wind turbine further comprising:

• a succession of carriages with wheels attached thereto, each carriage of the succession of carriages being separated from the frame and fixed thereto, around the axial direction at a fixed angular position, through pre-compressed elastic fixing elements disposed circumferentially around the axis of rotation, urging each carriage of the succession of carriages in a radial direction perpendicular to the axial direction, elastically modifying the distance between the wheels and the frame in the radial direction under directionally stable gravity-induced loads during the rotation of the hub due to the fixed angular position of each carriage in regards the frame;
• rails attached to the hub, coaxial with the axis of rotation, complementary to the wheels, the rails rolling about the axis of rotation supported on the wheels, the pre-compressed elastic fixing elements ensuring a permanent contact between the wheels of the carriages and the rails of the hub;
• a plurality of electrical coils circularly disposed around the axis of rotation configuring a stator of an electrical generator, each carriage supporting at least one of the plurality of electrical coils;
• a plurality of magnets circularly disposed around the axis of rotation, attached to the hub facing the plurality of electrical coils configuring a rotor of the electrical generator, the rotor being rotatable around the axis of rotation in solidarity with the hub,
• the electrical generator being suitable for generating electrical energy from the rotation of the hub with respect to the frame.