1
Kermit I Harner, Joseph M Kos, John P Patrick: Wind turbine generator pitch control system. United Technologies Corporation, Donald F Bradley, July 3, 1979: US04160170 (100 worldwide citation)

Wind energy is used to drive a wind turbine, which is in turn connected to an electrical generator to produce electrical power. The pitch angle of the wind turbine blades is controlled in a closed loop manner to maintain either a constant generator speed for isolated power generating stations or whe ...


2
Joseph M Kos, John P Patrick, Kermit I Harner: Multi-mode control system for wind turbines. United Technologies Corporation, Donald F Bradley, March 11, 1980: US04193005 (91 worldwide citation)

A multi-mode electronic wind turbine control system establishes a reference blade angle for a two-bladed, horizontal axis, variable pitch wind turbine rotor, the blade angle being regulated by a hydraulic pitch change mechanism. The rotor, via appropriate shafts and a gearbox, is coupled to a synchr ...


3
Kermit I Harner: Wind turbine generator acceleration control. United Technologies Corporation, Donald F Bradley, February 19, 1980: US04189648 (77 worldwide citation)

A power generating system includes a wind turbine driven generator, the wind turbine having a wind turbine driven rotor with a variable pitch angle blade. Stresses on the system during startup and shutdown are minimized by scheduling the blade angle as a function of the rotor speed and wind velocity ...


4
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 ...


5
Kermit I Harner, John P Patrick, Joseph M Kos: Predicted motion wind turbine tower damping. United Technologies Corporation, M P Williams, March 6, 1984: US04435647 (64 worldwide citation)

Damping of the primary bending mode of a tower (12) mounting a wind turbine having a control (36) for providing a pitch blade angle reference signal (40) to modulate the pitch of the turbine blades (1) through a pitch change mechanism (38) for constant power is provided by generating the pitch blade ...


6
Joseph M Kos, John P Patrick, Kermit I Harner: Motion responsive wind turbine tower damping. United Technologies Corporation, M P Williams, December 13, 1983: US04420692 (52 worldwide citation)

An accelerometer (1) disposed on the support tower (12) of a wind turbine electric generating system in the vicinity of the rotor (10, 16) thereof provides a signal (1) indicative of acceleration of the tower in the direction of the rotor rotational axis. The signal (2) is passed through a band-pass ...


7
John P Patrick, Joseph M Kos, Kermit I Harner: Blade pitch angle control for a wind turbine generator. United Technologies Corporation, John Swiatocha, July 13, 1982: US04339666 (44 worldwide citation)

A blade pitch angle control for a wind turbine-generator establishing an optimum power or torque reference signal which, when operating conditions so warrant, is not limited by the nominal torque or power ratings of various turbine generator components. The reference signal is indicative of a maximu ...


8
Kermit I Harner, Roy W Schneider: Control system for variable pitch fan propulsor. United Technologies Corporation, John D Del Ponti, January 13, 1976: US03932058 (40 worldwide citation)

A control for a variable pitch fan propulsor driven by a turbine type of power plant which fan is mounted in an engine bypass duct having a variable exit nozzle. The control serves to coordinate the control of fuel flow to the engine, the area of the fan exit nozzle, and the pitch of the fan blades ...


9
Kermit I Harner, Frank R Niessen, Robert Sherman: Blade pitch angle control for large wind turbines. United Technologies Corporation, John Swiatocha, April 7, 1987: US04656362 (24 worldwide citation)

A blade pitch angle control system for a wind turbine includes an improved control means (95) for providing a minimum pitch angle reference signal indicative of desired blade pitch at wind velocities less than rated. The control means includes means (35 and 30) for providing signals indicative of ge ...


10
Kermit I Harner, Roy W Schneider: Control system for variable pitch fan propulsor with reverse pitch. United Technologies Corporation, John D Del Ponti, February 3, 1976: US03936226 (23 worldwide citation)

A coordinated fan pitch, fuel flow and fan exhaust nozzle area control for a gas turbine powered aircraft propulsor of the bypass duct, variable pitch and exhaust nozzle configuration serves to effectuate reverse pitch change through feather, by minimizing forward thrust excursion and shaft torque t ...



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