A synchronous generator VASCAT S.A. will be used in retrofit of a Kaplan micro-hydro turbine of 220kW . The main innovation introduced by this innovative design is the elimination of the mechanical rotor blade pitch system (through the use of an inverter drive), and the direct coupling of the generator to the turbine shaft. To do this, VASCAT adapted specifically for their client, a permanent magnet synchronous generator from the MDD series, which is fully integrated into the mechanical design of the submerged turbine. The main improvements provided by this design are: the increase of the turbine efficiency, reduced maintenance requirements and improving reliability of the system (thanks to their mechanical simplification). This new solution is readily applicable in existing installations and therefore is particularly suitable for the modernization of hydro power plants.