Pitch-regulated vertical axis wind turbine

摘要

A cross flow wind turbine comprising a rotor mounted for rotation about a vertical axis and a plurality of blade assemblies mounted on the rotor. Each blade assembly comprises a blade of aerofoil section mounted vertically for pivotal movement about a vertical shaft. The turbine also includes a device for measuring the direction of the apparent fluid velocity, a shaft encoder for measuring the blade angle and a control system to set the blade angle such that the lift component of the aerodynamic forces on the blade contributes positively to the driving torque on the rotor.