Patent ID: 8794903
Filing Date: 2014-08-05
Classification: F03D,Y02E

Abstract:
1. A wind turbine system comprising: a shroud having an entrance portion configured to receive a fluid flow into the shroud, an exit portion configured to exhaust the fluid flow from the shroud, and a throat portion operatively coupling the entrance portion with the exit portion; a rotor assembly comprising a hub and a plurality of blades operatively coupled with the hub, the plurality of blades being positioned relative to the shroud to convert energy of the fluid flow into the shroud into rotary mechanical movement of the rotor assembly; an electric generator assembly operatively coupled with the rotor assembly and configured to convert the rotary mechanical movement of the rotor assembly into electric energy, the electric generator assembly comprising a servo motor and a position encoder; and a sensor configured to generate a signal representative of a speed of at least one of the rotor assembly or the electric generator.