Patent ID: 7821149
Filing Date: 2010-10-26
Classification: F03D,F05B,Y02E

Abstract:
1. An airborne system for producing electricity from wind energy, comprising: at least one turbine section, each of the at least one turbine section comprising: a lifting section connected to part of the at least one turbine section for generating a lifting force to cause the at least one turbine section to be airborne at a desired altitude; a tether; an anchoring section connected by the tether to another part of the at least one turbine section to anchor the at least one turbine section to a base relative to the earth; and a conductor that conducts electricity that is generated by the at least one generator to an energy usage or an energy storage system; wherein the at least one turbine section is constructed such that the center of gravity of the at least one turbine section is approximately in the lowest possible position relative to a substantially straight line between the part of the at least one turbine section connected to the lifting section and the part of the at least one turbine section connected to the anchoring section, while the at least one turbine is at rest; wherein the at least one turbine rotates when exposed to wind and causes rotational torque to be induced on the at least one turbine section, that causes an angular deviation of the center of gravity from its lowest possible position; wherein the angular deviation of the center of gravity causes a returning torque that increases with an increase of the angular deviation; wherein the returning torque acts on the at least one turbine section, causing the at least one turbine section to reach a stabilized angular position.