Abstract: A wind turbine (10) is disclosed having a hub (14) with electrical power therein and at least one blade (20) attached to the hub. The blade (20) has a blade root (21), a blade tip (26) and a down-wire (30) for the conduction of lightning current to the ground. The wind turbine (10) further has a blade electrical system (99) that takes electrical power from the hub (14) and transmits electrical power into the blade (20) to at least one area located between the blade root (21) and the blade tip (26). The blade electrical system (99) if formed by a power-transfer unit (100) having a power-driver unit (110), a power-conditioner unit (130) and a dielectric (120) separating the power-driver unit (110) and the power-conditioner unit (130). The power-driver unit (110) receives electrical power from the hub (14) and transmit the electrical power through the dielectric (120) to the power-conditioner unit (130).

Abstract: A wind turbine (10) is disclosed having a hub (14) with electrical power therein and at least one blade (20) attached to the hub. The blade (20) has a blade root (21), a blade tip (26) and a down-wire (30) for the conduction of lightning current to the ground. The wind turbine (10) further has a blade electrical system (99) that takes electrical power from the hub (14) and transmits electrical power into the blade (20) to at least one area located between the blade root (21) and the blade tip (26). The blade electrical system (99) if formed by a power-transfer unit (100) having a power-driver unit (110), a power-conditioner unit (130) and a dielectric (120) separating the power-driver unit (110) and the power-conditioner unit (130). The power-driver unit (110) receives electrical power from the hub (14) and transmit the electrical power through the dielectric (120) to the power-conditioner unit (130).

Abstract: In a wind turbine comprising a tower supporting a nacelle, at least one blade rotationally attached to the nacelle and having a blade-tip section, a system for measuring the separation distance between the tower and the blade-tip-section of the wind turbine, comprising an indicator stripe on the surface of the blade-tip section, an indicator ring encircling the tower, a camera in the nacelle and positioned such that the blade-tip section and the indicator ring are within the camera's field of view when the blade-tip is at its closest approach position to the tower, the camera digitally recording an image of its field of view at this closest approach position, the distance between indicator ring and camera being essentially equal to the distance between the indicator stripe and the camera at this closest approach position, and an image processor and tip-tower clearance calculator unit receiving the digitally recorded image and calculating a physical separation distance between the indicator stripe and the indi

Abstract: The invention relates to a method for pitch angle measurement and/or for constructing a pitch angle measurement system on a rotor blade (100) of a wind turbine, the rotor blade comprising a blade root (114) and extending along a longitudinal blade axis (180). The rotor blade is rotatably mounted, by its blade root (114), to rotate about the longitudinal blade axis (180), on a rotor hub (20) of the wind turbine, the rotor hub rotating or being rotatable about a rotor axis (36). At least one chord line direction indicator (430) is firmly connected to the rotor blade (100) at a distance from the blade root (114), and defines a chord line direction indicator direction (160) indicative of a direction of a chord line (140) of the rotor blade (100) at the location of the chord line direction indicator (430).

Abstract: The invention relates to a wind power installation comprising a rotor (6) which can be turned with wind power, and has a rotor hub (10) and at least one rotor blade (11) rotatably mounted thereon, a higher-level operation control device (15) and a blade angle adjustment system (16) communicatively connected to same and having components that can be used for the emergency deactivation of the wind power installation, by means of which system the rotor blade (11) can be rotated relative to the rotor hub (10) and can be thereby positioned in different blade angle positions, wherein control commands (54) for the positioning of the rotor blade can be output to the blade angle adjustment system (16) by the operation control device (15), and the blade angle adjustment system (16) follows the control commands (54) in a normal operation of the wind power installation and correspondingly positions the rotor blade (11), and wherein the blade angle adjustment system (16) also has a monitoring unit (50) that can run in par

Abstract: In a wind turbine comprising a tower supporting a nacelle, at least one blade rotationally attached to the nacelle and having a blade-tip section, a system for measuring the separation distance between the tower and the blade-tip-section of the wind turbine, comprising an indicator stripe on the surface of the blade-tip section, an indicator ring encircling the tower, a camera in the nacelle and positioned such that the blade-tip section and the indicator ring are within the camera's field of view when the blade-tip is at its closest approach position to the tower, the camera digitally recording an image of its field of view at this closest approach position, the distance between indicator ring and camera being essentially equal to the distance between the indicator stripe and the camera at this closest approach position, and an image processor and tip-tower clearance calculator unit receiving the digitally recorded image and calculating a physical separation distance between the indicator stripe and the indi

Abstract: Method for controlling a rotor blade adjustment device (14) of a wind turbine or water hydroelectric powerplant (1), wherein the rotor blade adjustment device (14) has a drive (20) which is connected to a rotor blade (8) which is subjected to a flow of wind or water and has the purpose of rotating the rotor blade (8) about a rotor blade axis (15) relative to a rotor hub (7) on which the rotor blade (8) is mounted so as to be rotatable about the rotor blade axis (15), and an electromagnetic brake (34) which is connected to the rotor blade (8) and has the purpose of blocking rotation of the rotor blade (8) about the rotor blade axis (15), wherein the brake (34) is actuated in order to change its activation state at a brake activation time (tB), wherein the drive (20) is actuated to change its driving state at a drive activation time (tA) which has a predetermined chronological offset (?tV) with respect to the brake activation time (tB), and wherein an electric current (IB) which flows through the brake (34) is

Abstract: The invention relates to a method for pitch angle measurement and/or for constructing a pitch angle measurement system on a rotor blade (100) of a wind turbine, the rotor blade comprising a blade root (114) and extending along a longitudinal blade axis (180). The rotor blade is rotatably mounted, by its blade root (114), to rotate about the longitudinal blade axis (180), on a rotor hub (20) of the wind turbine, the rotor hub rotating or being rotatable about a rotor axis (36). At least one chord line direction indicator (430) is firmly connected to the rotor blade (100) at a distance from the blade root (114), and defines a chord line direction indicator direction (160) indicative of a direction of a chord line (140) of the rotor blade (100) at the location of the chord line direction indicator (430).

Abstract: A method is disclosed for estimating the surface condition of a blade rotating about a rotational axis in an air or fluid stream.

Abstract: The invention relates to a wind power installation comprising a rotor (6) which can be turned with wind power, and has a rotor hub (10) and at least one rotor blade (11) rotatably mounted thereon, a higher-level operation control device (15) and a blade angle adjustment system (16) communicatively connected to same and having components that can be used for the emergency deactivation of the wind power installation, by means of which system the rotor blade (11) can be rotated relative to the rotor hub (10) and can be thereby positioned in different blade angle positions, wherein control commands (54) for the positioning of the rotor blade can be output to the blade angle adjustment system (16) by the operation control device (15), and the blade angle adjustment system (16) follows the control commands (54) in a normal operation of the wind power installation and correspondingly positions the rotor blade (11), and wherein the blade angle adjustment system (16) also has a monitoring unit (50) that can run in par

Abstract: Method for controlling a rotor blade adjustment device (14) of a wind turbine or water hydroelectric powerplant (1), wherein the rotor blade adjustment device (14) has a drive (20) which is connected to a rotor blade (8) which is subjected to a flow of wind or water and has the purpose of rotating the rotor blade (8) about a rotor blade axis (15) relative to a rotor hub (7) on which the rotor blade (8) is mounted so as to be rotatable about the rotor blade axis (15), and an electromagnetic brake (34) which is connected to the rotor blade (8) and has the purpose of blocking rotation of the rotor blade (8) about the rotor blade axis (15), wherein the brake (34) is actuated in order to change its activation state at a brake activation time (tB), wherein the drive (20) is actuated to change its driving state at a drive activation time (tA) which has a predetermined chronological offset (?tv) with respect to the brake activation time (tB), and wherein an electric current (IB) which flows through the brake (34) is

Abstract: The present invention relates to a wind turbine and a measuring system for determining the pitch angle of at least one blade relative to a hub of a wind turbine.

Abstract: A sensor device for measuring aerodynamic loads of a rotor blade for a wind power installation. The sensor device includes a reflector arranged in a cavity of the rotor blade which signals a signal evaluation device arranged at a distance from the reflector. The signal evaluation device detects and quantifies physical changes of the rotor blade from the reflected signal. A cleaning device for the reflector is arranged on the reflector for activation by a centrifugal force generated during the rotation of the rotor to clean the reflector.

Abstract: A method is disclosed for estimating the surface condition of a blade rotating about a rotational axis in an air or fluid stream.

Abstract: A pitch system for a wind turbine installation having an electrically driven pitch drive associated with each rotor blade and an electric motor arranged in a rotating part of the wind turbine installation for blade adjustments. A power and control unit is associated with the motor and has line connections for the transmission of power and control data from the power and control unit to the motor and vice versa. The line connections are passed via a first rotating bushing arranged at a connecting point between the rotating part and an axially adjacent stationary region. The pitch system also includes second rotating bushing which operates mechanically and electrically separately from the first rotating bushing and is connectable to the power and control unit and to the motor for maintaining reliable transmission of the power and control data if the first rotating bushing fails.

Abstract: The invention relates to a rotor of a wind turbine, comprising a rotor hub (8), which has at least one rotor blade (9, 10) protruding perpendicularly to the rotor axis (7), which at least one rotor blade can be adjusted in an angular range about the blade axis (11, 12) of the rotor blade with respect to the the blade bearing point (32) of the blade in the hub (8), and at least one sensor (18), which is connected to at least one evaluating unit (19) arranged in the hub (8) by means of a rotatable cable connection (20) suitable for energy transmission and/or communication. The cable connection (20) has at least one or more guiding elements (23). The guiding element (23) has one fastening point (24, 25) each in the rotor hub and in the rotor blade and comprises at least one element (26, 29) that is elastic in tension.

Abstract: The disclosure relates to a wind turbine having a machine support (5), a rotor (6) which can be driven by wind (13) to rotate about the rotor axis (7) and is mounted so that it can rotate on the machine support (5) about a rotor axis (7). The rotor includes a rotor hub (8) and several rotor blades (9, 10) which extend respectively in the direction of a blade axis (11, 12) running transverse or essentially transverse to the rotor axis (7). The rotor blades (9,10) are mounted so that they can rotate on the rotor hub (8) about the respective blade axis (11, 12). Blade angle adjustable drives (17, 18) are arranged on the rotor (6) and enable the rotor blades (9, 10) to rotate about the blade axes thereof (11, 12). A blade angle control device (24) is coupled to the blade angle adjusting drives (17, 18) and can control the blade angle adjusting drives (17, 18). An electric generator (15) is mechanically coupled to the rotor (6) and can be driven by the rotor to generate electric energy.

Abstract: This disclosure relates to a device for optically measuring the curvature of a rotor blade (18) of a wind power plant (1). The rotor blade is fixed at the blade root (23) to a rotor hub (8) or a rotor (6). The device includes at least one light-emitting external marking (33) fixed to the rotor blade (18) at a distance from the blade root (23), at least one camera (27) fixed to the rotor (6) for capturing the light (35) emitted from the external marking (33). The device provides first location information as a function of the relative position of the camera (27) with respect to the external marking (33). An evaluating device (37) is coupled to the camera (27), and a position detection means detects the relative location of the camera (27) with respect to the blade root (23) and provides second location information as a function of said relative location. The evaluating device (37) determines at least one variable characterizing the curvature of the rotor blade (18) while evaluating the position information.

Abstract: The invention relates to a rotor for a wind turbine of the type having a rotor hub (8) and a set of rotor blades (9). Each rotor blade (9) is rotatably mounted on the rotor hub (8) for rotation about a blade axis (11). A threaded spindle mechanism (13) interconnects the rotor blade (9) and the rotor hub (8). The threaded spindle mechanism (13) includes a spindle nut (32), a threaded spindle (31) and a drive (21) mounted on the rotor blade (9) adjacent a transition between the rotor hub (8) and the rotor blade (9). The drive (21) is rotatable together with the rotor blade (9) about the blade axis (11) relative to the rotor hub (8) by actuation of the threaded spindle mechanism (13).

Abstract: The invention relates to a method for controlling a wind power plant having a rotor (5) driven by wind and rotating about a horizontal or substantially horizontally aligned rotor axis (6). The rotor includes a plurality of rotor blades (1, 2, 3), each extending in the direction of a blade axis (11, 12 13) which is perpendicular or substantially perpendicular to the rotor axis and about which the respective rotor blade (1, 2, 3) is rotated, wherein the rotor (5) is rotated about a vertical or substantially vertically aligned yaw axis (8) having a yaw angle velocity (?), whereby gyroscopic loads are generated on the rotor blades (1, 2, 3), and wherein the gyroscopic loads on the rotor blades (1, 2, 3) are reduced by rotating the rotor blades (1, 2, 3) about the blade axes (11, 12, 13) thereof depending on the yaw angle velocity (?) or a guide variable (?c) influencing said velocity.