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127 records (took 0.025 seconds)

    51.
    发明专利
    未知

    公开(公告)号：FI77092B

    公开(公告)日：1988-09-30

    申请号：FI834074

    申请日：1983-11-07

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： HARNER KERMIT IVAN ,  NIESSEN FRANK RICHARD ,  SHERMAN ROBERT

    IPC: F03D7/04 ,  F03D7/02

    Abstract: 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 generated (output power or torque and the rotational frequency of the wind turbine rotor. The output and rotor speed signals are input to a function generator which, in rsponse to such signals, provides a signal indicative of the minimum pitch angle.

    52.
    发明专利
    未知

    公开(公告)号：FI77091B

    公开(公告)日：1988-09-30

    申请号：FI831030

    申请日：1983-03-25

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： KOS JOSEPH MICHAEL ,  PATRICK JOHN PETER ,  HARNER KERMIT IVAN

    IPC: F03D7/04 ,  F03D7/02 ,  F03D13/20

    Abstract: 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 filter (4) for summation (9) with a torque/power controlled (100) blade pitch angle reference rate signal (98), the integral (104) of which provides a blade pitch angle reference signal (40) to control the pitch angle of the rotor blades (10) through a pitch change mechanism (38), thereby to provide additional, positive aerodynamic damping to the tower while modulating blade angle for constant torque/power in response to wind turbulence.

    53.
    发明专利
    未知

    公开(公告)号：NO158110C

    公开(公告)日：1988-07-13

    申请号：NO832216

    申请日：1983-06-20

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： HARNER KERMIT IVAN ,  PATRICK JOHN PETER ,  VOSSELLER KENNETH FRANKLYN

    IPC: F03D7/02 ,  F03D7/04

    Abstract: A blade feathering system for wind turbines includes a feather actuator (299), control means (330 and 335) operatively connected thereto and an adjustment means (340) operatively connected to the control means for selectively varying the rate of operation of the feather actuator for feathering the wind turbine blades (10 and 15) at a variable rate.

    55.
    发明专利
    未知

    公开(公告)号：NO864564L

    公开(公告)日：1987-05-19

    申请号：NO864564

    申请日：1986-11-17

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： DOMAN GLIDDEN SWEET ,  KOS JOSEPH MICHAEL ,  HARNER KERMIT IVAN ,  DIVALENTIN EUGENE D ,  HEALY HENRY STEPHEN

    IPC: F03D7/02 ,  F03D7/04 ,  F03D9/00 ,  H02P9/42 ,  F03D

    Abstract: 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 the power flow from the AC generator to the grid which thereby controls the air gap torque between the generator stator and rotor. The turbine speed is maneuvered to increase efficiency by precisely controlling the air gap torque according to a schedule defining sensed generator speed versus sensed generated power.

    56.
    发明专利
    未知

    公开(公告)号：FI864699A

    公开(公告)日：1987-05-19

    申请号：FI864699

    申请日：1986-11-18

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： DOMAN GLIDDEN SWEET ,  KOS JOSEPH MICHAEL ,  HARNER KERMIT IVAN ,  DIVALENTIN EUGENE D ,  HEALY HENRY STEPHEN

    IPC: F03D7/04 ,  F03D7/02 ,  F03D9/00 ,  H02P9/42 ,  F03D

    Abstract: 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 the power flow from the AC generator to the grid which thereby controls the air gap torque between the generator stator and rotor. The turbine speed is maneuvered to increase efficiency by precisely controlling the air gap torque according to a schedule defining sensed generator speed versus sensed generated power.

    57.
    发明专利
    未知

    公开(公告)号：FI864699A0

    公开(公告)日：1986-11-18

    申请号：FI864699

    申请日：1986-11-18

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： DOMAN GLIDDEN SWEET ,  KOS JOSEPH MICHAEL ,  HARNER KERMIT IVAN ,  DIVALENTIN EUGENE D ,  HEALY HENRY STEPHEN

    IPC: F03D7/04 ,  F03D7/02 ,  F03D9/00 ,  H02P9/42 ,  F03D

    Abstract: 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 the power flow from the AC generator to the grid which thereby controls the air gap torque between the generator stator and rotor. The turbine speed is maneuvered to increase efficiency by precisely controlling the air gap torque according to a schedule defining sensed generator speed versus sensed generated power.

    PREDICTED MOTION WINDTURBINE TOWER DAMPING
    58.
    发明专利
    PREDICTED MOTION WINDTURBINE TOWER DAMPING 未知

    公开(公告)号：AU552913B2

    公开(公告)日：1986-06-26

    申请号：AU1248183

    申请日：1983-03-11

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： KOS JOSEPH MICHAEL ,  HARNER KERMIT IVAN ,  PATRICK JOHN PETER

    IPC: F03D7/04 ,  F03D7/02 ,  F03D13/20 ,  F16F15/02

    Abstract: 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 angle reference signal as the integral (104) of the summation (266) of a torque/power controlling blade pitch angle reference rate signal (98) with an estimated acceleration signal (255) generated by filtering (250, 252, 254) the blade pitch angle reference signal (40) with the following transfer function

    59.
    发明专利
    未知

    公开(公告)号：BR8306078A

    公开(公告)日：1984-06-12

    申请号：BR8306078

    申请日：1983-11-04

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： HARNER KERMIT IVAN ,  NIESSEN FRANK RICHARD ,  SHERMAN ROBERT

    IPC: F03D7/04 ,  F03D7/02

    Abstract: 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 generated (output power or torque and the rotational frequency of the wind turbine rotor. The output and rotor speed signals are input to a function generator which, in rsponse to such signals, provides a signal indicative of the minimum pitch angle.

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