Patent ID: 6952058
Filing Date: 2005-10-04
Classification: F03D,H02K,Y02E

Abstract:
1. A wind energy conversion system comprising an upper wind turbine comprising a stator, a blade assembly mounted for rotation in a first direction about a vertical rotation axis in response to air flow through said upper wind turbine, and a rotor carried by said blade assembly for rotation past said stator to produce an electrical output; a lower wind turbine disposed beneath said upper wind turbine and comprising a stator, a blade assembly mounted for rotation in a second direction, opposite said first direction, about said vertical rotation axis in response to air flow through said lower wind turbine, and a rotor carried by said blade assembly of said lower wind turbine for rotation past said stator of said lower wind turbine to produce an electrical output, each of said upper and lower wind turbines producing a torque; a tower supporting said upper and lower wind turbines in an elevated position above the ground; and a balancing mechanism for balancing said torques to avoid a net torque.