1
Glidden S Doman, Joseph M Kos, Kermit I Harner, Eugene D DiValentin, Henry S Healy: Variable speed wind turbine. United Technologies Corporation, Francis J Maguire Jr, September 22, 1987: US04695736 (75 worldwide citation)

A variable speed wind turbine includes a frequency converter which converts variable frequency AC from a turbine driven AC generator to fixed frequency AC for delivery to a power grid. The frequency converter is typically an electronic cycloconverter or rectifier-inverter and is also used to control ...


2
Eugene D DiValentin, Henry S Healy: Torque control for a variable speed wind turbine. United Technologies Corporation, Francis J Maguire Jr, October 27, 1987: US04703189 (67 worldwide citation)

Apparatus and method for controlling a variable speed wind turbine-generator at improved efficiencies is disclosed. The method and apparatus of the invention control the rotor tip speed below the limiting torque of the wind turbine at a selected constant velocity ratio with respect to wind speed and ...



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