WIND MICROTURBINE WITH AXIAL DEVELOPMENT

A wind microturbine (1) with axial development comprising a central shaft (2) extending mainly along a vertical axis (Y) and provided with anchoring means (3) adapted to be coupled to a support structure (T), a first inner blade (4) of the dynamic resistance type, externally coupled to the central shaft (2) and adapted to be rotated about the vertical axis (Y) by the wind to which it is exposed and which impacts against it to capture the kinetic energy thereof and transform it into mechanical energy, a second outer blade (5) of the dynamic load-bearing type, coupled to the central shaft (2) and arranged externally coaxial to the first blade (4), adapted to be rotated about the vertical axis (Y) by the wind to which it is exposed and which impacts against it to capture the kinetic energy thereof and transform it into mechanical energy, electric generator means (6), applied to the central shaft (2) and operatively connected to each of the blades (4, 5), adapted to transform the mechanical energy stored therein into electrical energy to be provided to a user, and dynamic joining means (7), applied to the central shaft (2) and coupling the first blade (4) and the second blade (5) together. In particular, the dynamic joining means (7) cooperate with actuation means (8) so as to make the rotation of the second outer blade (5) independent of the rotation of the first inner blade (4) while keeping both the first inner blade (4) and the second outer blade operatively connected to the electric generator means (6) to produce electrical energy, when the angular speed of the second outer blade (5), under the action of the wind, reaches a predetermined threshold value (RpmD[threshold]), set based on the dimensions of the blades (4, 5).