Patent ID: 7109599

Claim:
An electrical generation system driven by the wind, comprising: supporting structure; a wind-responsive wind rotor having a vertical axis of rotation; a shaft driven by said wind rotor and; an electrical generator comprising a generator rotor and a generator stator, said generator stator being fixed relative to said structure, said generator rotor being attached to and driven by said shaft and having an axis of rotation, said wind-responsive wind rotor, said shaft, and said generator rotor being coaxial and directly connected to one another; said wind rotor comprising a plurality of vanes mounted to rings concentric with and attached to said shaft, said vanes being so proportioned and arranged that, when facing the wind, a first one of their faces generates a “lifting” force, exerted a torque on one side of the ring through at least a portion of its path around the axis, and a second face which acts as a baffle to exert a torque force on the ring derived from wind flow from the same direction, both forces being exerted in the same rotational sense on the rotor, wherein the ratio D/H of the diameter D of the wind rotor to its height H is not less than 2; said generator rotor comprising two plates, each carrying a plurality of permanent magnets, and said generator stator carrying a plurality of conductive windings, said generator stator being sandwiched between said two generator rotor plates to generate electrical current when the generator rotor is rotated, said plates being flat or ring shaped; and said current is provided to a user system by leads from said windings.